This study evaluated the effects of nitrogen source, fall fertilization practices, and fungicide applications on spring dead spot severity caused by Ophiosphaerella herpotricha and O. korrae in hybrid bermudagrass. Ammonium sulfate and calcium nitrate reduced spring dead spot severity compared to urea and sulfur coated urea. Disease severity was positively correlated with soil pH for O. herpotricha but negatively correlated for O. korrae. Preventive fungicide applications provided inconsistent control of spring dead spot.
Impact
We will gain a better understanding of the critical soil conditions and microbial factors that uncouple or couple nitrification from the other NH4+ consuming sinks. This will enable us to refine nitrogen models and field based management strategies that prevent excessive and/or untimely losses of soil and fertilizer N. This will reduce economic losses to farmers and reduce the potential for off-site damage to environmental quality.
Uptake and translocation of copper by mycorrhized seedlings Sterculia setiger...researchagriculture
Pot culture experiments were established to determine the effects of arbuscular mycorrhizal fungus (AMF) (Glomus fasciculatum) on tropical gum tree (Sterculia setigera Del.) grown in Copper contaminated soils. AMF and non-AMF inoculated plants were grown in sterilized substrates and subjected to different copper level (0, 200, 400,600, 800 mg kg-1) concentrations. Root and shoot biomasses of inoculated plants were significantly higher than those of non-inoculated. Copper concentrations in roots were significantly higher than those in shoots in both the inoculated and non-inoculated plants, indicating this heavy metal mostly accumulated in the roots of plants. Copper translocation efficiency from root to shoot was lower in mycorrhizal plants than in nonmycorrhizal ones at any Copper addition levels. However, at high soil Copper concentrations, shoot Copper concentration of inoculated plant were significantly reduced by about 50% compared to non-inoculated plants. These results indicated that AMF could promote tropical gum tree growth and decrease the uptake of Cu at higher soil concentrations, thus protecting their hosts from the toxicity of Copper contaminated soils.
Article Citation:
Malick Ndiaye, Cavalli Eric, Diouf Adama, Diop Tahir Abdoulaye.
Uptake and translocation of copper by mycorrhized seedlings Sterculia setigera (Del.) under Copper-contamined soil.
Journal of Research in Agriculture (2012) 1(1): 022-028.
Full Text:
http://www.jagri.info/documents/AG0012.pdf
Uptake and translocation of copper by mycorrhized seedlings Sterculia setige...researchagriculture
Pot culture experiments were established to determine the effects of
arbuscular mycorrhizal fungus (AMF) (
Glomus fasciculatum
) on tropical gum tree
(
Sterculia setigera
Del.) grown in Copper contaminated soils. AMF and non
-
AMF
inoculated plants were grown in sterilized substrates and subjected to different
copper level (0, 200, 400,600, 800 mg kg
-
1
) concentrations. Root and shoot biomasses
of inoculated plants were significantly higher than those of non
-
inoculated. Copper
concentrations in roots were significantly higher than those in shoots in both the
inoculated and non
-
inoculated plants, indicating this heavy metal mostly accumulated
in the roots of plants. Copper translocation efficiency from root to shoot was lower in
mycorrhizal plants than in nonmycorrhizal ones at any Copper addition levels.
However, at high soil Copper concentrations, shoot Copper concentration of
inoculated plant were significantly reduced by about 50% compared to non
-
inoculated plants. These results indicated that AMF could promote tropical gum tree
growth and decrease the uptake of Cu at higher soil concentrations, thus protecting
their hosts from the toxicity of Copper contaminated soils.
Effect of calcium carbide waste on the growth and biomass of Okra(Abelmoschus...iosrjce
The effects of different concentration of spent calcium carbide on the growth indexes (percentage
germination, plant height, leaf area, number of leaves, and plant biomass) on okra (Abelmoschus esculentus)
were studied at a screen house located beside the academic building of the Federal University Of Technology,
Akure, Nigeria. 5kg of soil was polluted with varying concentrations of spent carbide (100g, 200g and 300g)
with the control having 0g of spent carbide. Okra seed were introduced and completely randomized design was
used. The whole experiment was replicated 4 times. Result indicates that the plants grown in 100g spent carbide
polluted soil did better in terms of plant height when compared to other treatments and the control. At 8 weeks
after planting (WAP), 100g concentration had the highest possible mean plant height (38.25±1.59) while the
control recorded (25.78±1.76). This height was significantly higher (p<0.05)><0.05)><0.05) although 100g
plants had the highest of the treatments (5.97±1.11).Other growth indexes show okra plants in 100g polluted
soil performing better than other treatments and control. This growth reduces drastically as the concentration
of spent calcium carbide increases above 100g concentration level of spent calcium carbide. This shows that
okra (Abelmoschus esculentus) grows well in low concentration of spent carbide.
Study of nitrate adsorption characteristics on red soileSAT Journals
Abstract
In this research, adsorption of Nitrate (N-Adsorption) on Red soil has been studied through using batch adsorption techniques. Main
objectives of this study are, to study the physical properties of Red soil, detection of Nitrate removal by adsorbent as a function of
contact time, adsorbent dosage and pH, to study sorption kinetics. The results of this study showed that the Optimum contact time,
dosage and pH for adsorption of Nitrate on Red soil reached to equilibrium after 130mins, with removal efficiency of (86%), 1400mg
as optimum dosages. Higher adsorption of Nitrate was observed at higher pH, obtained at pH 6.0, the rate of adsorption of Nitrate
obeys first order rate equation. The obtained results of the batch experiments are best fit to Langmuir and Freundlich adsorption
isotherms. From the experimental analysis it is concluded that Red soil shows good removal efficiency and hence can be used as
adsorbents.
Keywords: N-Adsorption, characteristics, Batch Experiments, Freundlich Isotherm, Langmuir Isotherm.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Impact
We will gain a better understanding of the critical soil conditions and microbial factors that uncouple or couple nitrification from the other NH4+ consuming sinks. This will enable us to refine nitrogen models and field based management strategies that prevent excessive and/or untimely losses of soil and fertilizer N. This will reduce economic losses to farmers and reduce the potential for off-site damage to environmental quality.
Uptake and translocation of copper by mycorrhized seedlings Sterculia setiger...researchagriculture
Pot culture experiments were established to determine the effects of arbuscular mycorrhizal fungus (AMF) (Glomus fasciculatum) on tropical gum tree (Sterculia setigera Del.) grown in Copper contaminated soils. AMF and non-AMF inoculated plants were grown in sterilized substrates and subjected to different copper level (0, 200, 400,600, 800 mg kg-1) concentrations. Root and shoot biomasses of inoculated plants were significantly higher than those of non-inoculated. Copper concentrations in roots were significantly higher than those in shoots in both the inoculated and non-inoculated plants, indicating this heavy metal mostly accumulated in the roots of plants. Copper translocation efficiency from root to shoot was lower in mycorrhizal plants than in nonmycorrhizal ones at any Copper addition levels. However, at high soil Copper concentrations, shoot Copper concentration of inoculated plant were significantly reduced by about 50% compared to non-inoculated plants. These results indicated that AMF could promote tropical gum tree growth and decrease the uptake of Cu at higher soil concentrations, thus protecting their hosts from the toxicity of Copper contaminated soils.
Article Citation:
Malick Ndiaye, Cavalli Eric, Diouf Adama, Diop Tahir Abdoulaye.
Uptake and translocation of copper by mycorrhized seedlings Sterculia setigera (Del.) under Copper-contamined soil.
Journal of Research in Agriculture (2012) 1(1): 022-028.
Full Text:
http://www.jagri.info/documents/AG0012.pdf
Uptake and translocation of copper by mycorrhized seedlings Sterculia setige...researchagriculture
Pot culture experiments were established to determine the effects of
arbuscular mycorrhizal fungus (AMF) (
Glomus fasciculatum
) on tropical gum tree
(
Sterculia setigera
Del.) grown in Copper contaminated soils. AMF and non
-
AMF
inoculated plants were grown in sterilized substrates and subjected to different
copper level (0, 200, 400,600, 800 mg kg
-
1
) concentrations. Root and shoot biomasses
of inoculated plants were significantly higher than those of non
-
inoculated. Copper
concentrations in roots were significantly higher than those in shoots in both the
inoculated and non
-
inoculated plants, indicating this heavy metal mostly accumulated
in the roots of plants. Copper translocation efficiency from root to shoot was lower in
mycorrhizal plants than in nonmycorrhizal ones at any Copper addition levels.
However, at high soil Copper concentrations, shoot Copper concentration of
inoculated plant were significantly reduced by about 50% compared to non
-
inoculated plants. These results indicated that AMF could promote tropical gum tree
growth and decrease the uptake of Cu at higher soil concentrations, thus protecting
their hosts from the toxicity of Copper contaminated soils.
Effect of calcium carbide waste on the growth and biomass of Okra(Abelmoschus...iosrjce
The effects of different concentration of spent calcium carbide on the growth indexes (percentage
germination, plant height, leaf area, number of leaves, and plant biomass) on okra (Abelmoschus esculentus)
were studied at a screen house located beside the academic building of the Federal University Of Technology,
Akure, Nigeria. 5kg of soil was polluted with varying concentrations of spent carbide (100g, 200g and 300g)
with the control having 0g of spent carbide. Okra seed were introduced and completely randomized design was
used. The whole experiment was replicated 4 times. Result indicates that the plants grown in 100g spent carbide
polluted soil did better in terms of plant height when compared to other treatments and the control. At 8 weeks
after planting (WAP), 100g concentration had the highest possible mean plant height (38.25±1.59) while the
control recorded (25.78±1.76). This height was significantly higher (p<0.05)><0.05)><0.05) although 100g
plants had the highest of the treatments (5.97±1.11).Other growth indexes show okra plants in 100g polluted
soil performing better than other treatments and control. This growth reduces drastically as the concentration
of spent calcium carbide increases above 100g concentration level of spent calcium carbide. This shows that
okra (Abelmoschus esculentus) grows well in low concentration of spent carbide.
Study of nitrate adsorption characteristics on red soileSAT Journals
Abstract
In this research, adsorption of Nitrate (N-Adsorption) on Red soil has been studied through using batch adsorption techniques. Main
objectives of this study are, to study the physical properties of Red soil, detection of Nitrate removal by adsorbent as a function of
contact time, adsorbent dosage and pH, to study sorption kinetics. The results of this study showed that the Optimum contact time,
dosage and pH for adsorption of Nitrate on Red soil reached to equilibrium after 130mins, with removal efficiency of (86%), 1400mg
as optimum dosages. Higher adsorption of Nitrate was observed at higher pH, obtained at pH 6.0, the rate of adsorption of Nitrate
obeys first order rate equation. The obtained results of the batch experiments are best fit to Langmuir and Freundlich adsorption
isotherms. From the experimental analysis it is concluded that Red soil shows good removal efficiency and hence can be used as
adsorbents.
Keywords: N-Adsorption, characteristics, Batch Experiments, Freundlich Isotherm, Langmuir Isotherm.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Brachiaria spp. are the most widely planted tropical forage with niches from Southeast
Asia, Sub-Saharan Africa, Latin American and the Caribbean. This tropical forage grass have a mechanism known as biological nitrification inhibition (BNI) able to inhibit nitrifiers activity. This study analyzes the behavior of inorganic N dynamics, microbial activity and CH4 and N2O in Brachiaria spp. on a tropical pasture.
Assessment of remediation Potentials of maize (Zea mays) on sites co-contamin...IJAEMSJORNAL
Phytoremediation is a promising technology for the remediation of sites co-contaminated with inorganic and organic pollutants. A pot experiment was conducted to evaluate the remediation potential of Z.mays in soil co- contaminated with Pb and antracene. Pristine sandy loam soils were polluted with Pb chloride salt and antracene at three different levels (50mg/kg of Pb, 100mg/kg of Pb, and 100mg/kg of Pb+100mg/kg of antracene) and laid out in completely randomized design with 3 replicates. Shoot dry matter weight was significantly reduced (p≤0.05) when compared with control treatments by 40% when exposed to100mg kg-1 of Pb. There was a 48% inhibition of shoot dry matter of Z.mays relative to control treatments when 100 mg Pb kg-1 was mixed with 100 mgkg-1 antracene. Root and shoot metal concentration in Zea mays increased with increasing concentration of Pb. The average Translocation Factor (TF < 1 (0.69) obtained suggests that Zea mays predominantly retains Pb in the root portion of the plant. There was a 5% increase in shoot Pb concentration when soil was contaminated with Pb and antracene. The extractable antracene decreased significantly (p≤0.05) in soil planted with Z.mays as well as in pots without maize plant. This accounted for 65 and 72% of antracene dissipation in planted soil and 40-46% dissipation in unplanted soil. This result suggested that Zeamays is a promising candidate for uptake Pb and dissipation of antracene in co-contaminated soils.
Arsenic in Tube Well Water in Six Blocks of Supaul District, Bihariosrjce
An experimental estimation of arsenic in a large number of samples by Field Test Kits and by
Hydride Generation Atomic Absorption Spectrophotometer (HGAAS) was done. Water samples were collected
from the following blocks of Supaul district, viz., Raghopur, Basantpur, Supaul, Nirmali, Saraigarh-Bhaptiyahi
and Triveniganj. The aim of this study was to analyze the total arsenic concentration in tube well water of these
regions at different locations. Twenty water samples were randomly selected from each block (n=120) for the
determination of Arsenic concentration, using Field Test Kits. Few samples (n=11) found with higher
concentration of arsenic, were also estimated and confirmed by HGAAS method for comparative observation.
The maximum concentration of arsenic was found to be 0.10 mg/l by using Field Test Kits method and the
average concentration of arsenic of the selected samples was 0.02 mg/l, whereas around 20% of these tube
wells had arsenic concentration above 0.05 mg/l. It was observed that the results obtained by usingField Test
Kits showed less measurement as compared to those obtained by HGAAS method for the same samples, when
the arsenic concentration measured ≤0.10 mg/l. Arsenic concentration was significantly (p<0.0001) higher in
HGASS results than the value obtained by Field Test Kit method.
A New Value Framework for Creative Businesses - BBH Labs at SPOT Conference 2014Agathe Guerrier
A talk given by Agathe Guerrier, Head of BBH Labs in London, at SPOT conference in Aarhus in May 2014, outlining a point of view on new types of ideas that can drive growth for creative businesses.
Second atelier gratuit autour des technologies HTML5 / CSS3 / Javascript organisé par La Coopérative des Tilleuls.
Au menu cette fois-ci une initiation à l'intégration web grâce aux feuilles de style CSS.
Après avoir appris lors du premier atelier à créer et à structurer des pages web grâce à HTML, nous verrons comment les mettre en forme avec les feuilles de style en cascade CSS.
Nous découvrirons ensembles :
- les fondements du langage CSS (syntaxe, cascade, sélecteurs)
- quelques balises et attributs HTML utiles pour la CSS
- le formatage de texte (police, couleur, gras, italique...)
- le positionnement des éléments
- les couleurs et images de fond
Ce cours introduit aux trois langages de programmation du Web que sont l'HTML, le CSS et le Javascript. L'HTML est un langage de balisage qui permet de décrire un document et sa structure. Le CSS est un langage qui permet de définir des règles de style à appliquer à un document. Enfin, Javascript est un langage permettant d'ajouter un aspect dynamique à une page web.
Exploration et visualisation de fichiers XML avec BaseXEmmanuelle Morlock
Atelier de formation "Humanités numériques" du laboratoire HISoMA (UMR 5189) - Séance 2 - 19/11/2014 - Exploration et visualisation de fichiers XML avec BaseX.
Numbered sticky notes - students stuck these small sticky notes into their book at the appropriate spot. Helped them annotate the play.
Read the each scene aloud and then went back highlighting and annotating
Brachiaria spp. are the most widely planted tropical forage with niches from Southeast
Asia, Sub-Saharan Africa, Latin American and the Caribbean. This tropical forage grass have a mechanism known as biological nitrification inhibition (BNI) able to inhibit nitrifiers activity. This study analyzes the behavior of inorganic N dynamics, microbial activity and CH4 and N2O in Brachiaria spp. on a tropical pasture.
Assessment of remediation Potentials of maize (Zea mays) on sites co-contamin...IJAEMSJORNAL
Phytoremediation is a promising technology for the remediation of sites co-contaminated with inorganic and organic pollutants. A pot experiment was conducted to evaluate the remediation potential of Z.mays in soil co- contaminated with Pb and antracene. Pristine sandy loam soils were polluted with Pb chloride salt and antracene at three different levels (50mg/kg of Pb, 100mg/kg of Pb, and 100mg/kg of Pb+100mg/kg of antracene) and laid out in completely randomized design with 3 replicates. Shoot dry matter weight was significantly reduced (p≤0.05) when compared with control treatments by 40% when exposed to100mg kg-1 of Pb. There was a 48% inhibition of shoot dry matter of Z.mays relative to control treatments when 100 mg Pb kg-1 was mixed with 100 mgkg-1 antracene. Root and shoot metal concentration in Zea mays increased with increasing concentration of Pb. The average Translocation Factor (TF < 1 (0.69) obtained suggests that Zea mays predominantly retains Pb in the root portion of the plant. There was a 5% increase in shoot Pb concentration when soil was contaminated with Pb and antracene. The extractable antracene decreased significantly (p≤0.05) in soil planted with Z.mays as well as in pots without maize plant. This accounted for 65 and 72% of antracene dissipation in planted soil and 40-46% dissipation in unplanted soil. This result suggested that Zeamays is a promising candidate for uptake Pb and dissipation of antracene in co-contaminated soils.
Arsenic in Tube Well Water in Six Blocks of Supaul District, Bihariosrjce
An experimental estimation of arsenic in a large number of samples by Field Test Kits and by
Hydride Generation Atomic Absorption Spectrophotometer (HGAAS) was done. Water samples were collected
from the following blocks of Supaul district, viz., Raghopur, Basantpur, Supaul, Nirmali, Saraigarh-Bhaptiyahi
and Triveniganj. The aim of this study was to analyze the total arsenic concentration in tube well water of these
regions at different locations. Twenty water samples were randomly selected from each block (n=120) for the
determination of Arsenic concentration, using Field Test Kits. Few samples (n=11) found with higher
concentration of arsenic, were also estimated and confirmed by HGAAS method for comparative observation.
The maximum concentration of arsenic was found to be 0.10 mg/l by using Field Test Kits method and the
average concentration of arsenic of the selected samples was 0.02 mg/l, whereas around 20% of these tube
wells had arsenic concentration above 0.05 mg/l. It was observed that the results obtained by usingField Test
Kits showed less measurement as compared to those obtained by HGAAS method for the same samples, when
the arsenic concentration measured ≤0.10 mg/l. Arsenic concentration was significantly (p<0.0001) higher in
HGASS results than the value obtained by Field Test Kit method.
A New Value Framework for Creative Businesses - BBH Labs at SPOT Conference 2014Agathe Guerrier
A talk given by Agathe Guerrier, Head of BBH Labs in London, at SPOT conference in Aarhus in May 2014, outlining a point of view on new types of ideas that can drive growth for creative businesses.
Second atelier gratuit autour des technologies HTML5 / CSS3 / Javascript organisé par La Coopérative des Tilleuls.
Au menu cette fois-ci une initiation à l'intégration web grâce aux feuilles de style CSS.
Après avoir appris lors du premier atelier à créer et à structurer des pages web grâce à HTML, nous verrons comment les mettre en forme avec les feuilles de style en cascade CSS.
Nous découvrirons ensembles :
- les fondements du langage CSS (syntaxe, cascade, sélecteurs)
- quelques balises et attributs HTML utiles pour la CSS
- le formatage de texte (police, couleur, gras, italique...)
- le positionnement des éléments
- les couleurs et images de fond
Ce cours introduit aux trois langages de programmation du Web que sont l'HTML, le CSS et le Javascript. L'HTML est un langage de balisage qui permet de décrire un document et sa structure. Le CSS est un langage qui permet de définir des règles de style à appliquer à un document. Enfin, Javascript est un langage permettant d'ajouter un aspect dynamique à une page web.
Exploration et visualisation de fichiers XML avec BaseXEmmanuelle Morlock
Atelier de formation "Humanités numériques" du laboratoire HISoMA (UMR 5189) - Séance 2 - 19/11/2014 - Exploration et visualisation de fichiers XML avec BaseX.
Numbered sticky notes - students stuck these small sticky notes into their book at the appropriate spot. Helped them annotate the play.
Read the each scene aloud and then went back highlighting and annotating
Fate of manure nitrogen applied for grass silage productionLPE Learning Center
The full proceedings paper is at: www.extension.org/72781
Previous research conducted in western Washington State has demonstrated that when manure N is applied at rates greater than needed for grass uptake, excess N in soil in the form of nitrate-N can leach to shallow groundwater during the months of high rainfall. In a prior study, it was evident that tillage and reseeding of the cropland was a contributor to loss of nitrate–N from soil to underlying groundwater. The objective of this study was to characterize the effect of re-seeding of cropland using minimum tillage and conventional tillage methods on crop uptake of nitrogen, soil nitrate-N concentration, nitrate concentration in shallow ground water underlying the field, and the relationships between these matrices.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Influence of Sodium Chloride on germination, and Zinc, Copper, Zinc-Copper mi...Premier Publishers
Seed germination and seedling performance of Dorke and Omankwa corn varieties were investigated under varying salinity, copper and zinc concentrations. Sample analyses were done using AAS. Germination of both seeds decreased with increasing Sodium chloride. When NaCl was increased from 3 to 6ppm, the range of germination of Dorke seeds reduced from 33 - 20% while that of Omankwa seeds reduced from 20% to 13.3%. 85.5% germination in 60mMNaCl was the highest in Dorke and 72.2% germination in 90mMNaCl was the lowest. 87.8% germination in 30mMNaCl was the highest for Omankwa hybrid, 30% in 90mM being its lowest. Cu2+ accumulated more in the roots than shoot of both hybrids, while Zn2+ accumulated more in their shoots than the roots. Highest mean fresh weight of Dorke was recorded in moderate Cu2+ and Zn2+. Also highest mean fresh weight of Omankwa hybrid occurred under low Cu2+ level and moderate Zn2+ levels, but was highest in higher levels of Zn2+ and Cu2+ mixture. From the study, farmers are advised against planting the two hybrids in alkaline soils and to apply Cu2+/Zn2+ based fertilizers to improve photosynthetic activity and biomass.
Delivering Micro-Credentials in Technical and Vocational Education and TrainingAG2 Design
Explore how micro-credentials are transforming Technical and Vocational Education and Training (TVET) with this comprehensive slide deck. Discover what micro-credentials are, their importance in TVET, the advantages they offer, and the insights from industry experts. Additionally, learn about the top software applications available for creating and managing micro-credentials. This presentation also includes valuable resources and a discussion on the future of these specialised certifications.
For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Thinking of getting a dog? Be aware that breeds like Pit Bulls, Rottweilers, and German Shepherds can be loyal and dangerous. Proper training and socialization are crucial to preventing aggressive behaviors. Ensure safety by understanding their needs and always supervising interactions. Stay safe, and enjoy your furry friends!
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
Digital Artefact 1 - Tiny Home Environmental Design
Impact of Fertilization Programs and Preventive Fungicide Applications On Spring Dead Spot in Hybrid Bermudagrass
1. Impact of Fertilization Programs and Preventive
Fungicide Applications On Spring Dead Spot in
Hybrid Bermudagrass
L.P. Tredway, M.D. Soika, and E.L. Butler
Department of Plant Pathology
North Carolina State University
NC STATE TURFGRASS PATHOLOGY
2. Spring Dead Spot
• most severe disease of
hybrid bermudagrasses in
transition zone climates
• preventive fungicides erratic
in their performance, and
often not economical
• influence of soil properties
and fertilization programs
not well understood
3. Spring Dead Spot
• caused by root, rhizome,
and stolon infections by
Ophiosphaerella species
• fungal infections reduce
bermudagrass tolerance to
freezing temperatures
• ‘patch diseases’ typically
enhanced by high soil pH
• fall potassium applications
often recommended to
improve cold tolerance
4. How does soil pH influence take-all patch development?
• the take-all patch pathogen,
Gaeumannomyes graminis var. avenae,
facilitates infection by sequestering Mn on
the root surface
• lower pH increases the solubility of Mn in
the soil, allowing the root to better resist
infection
• lower pH also increases population of
fluorescent Pseudomonads, which
produce antifungal compounds on the
root surface
5. Previous Research: Fertilization and Spring Dead Spot
• Dernoeden, Crahay and Davis (1991) studied impact of nitrogen
source and potassium on spring dead spot development
• in greenhouse, ammonium sulfate or potassium chloride
increased bermudagrass survival after inoculation with O. korrae
• in field studies, ammonium sulfate, ammonium chloride, and
ammonium chloride + potassium chloride provided up to 46%
suppression
• significant correlation between SDS and soil pH detected
6. Previous Research: Fertilization and Spring Dead Spot
• McCarty, Lucas and DiPaola (1992) investigated the effect of fall
nitrogen and potassium applications
• late fall applications of sulfur coated urea (98 kg N/ha) or
potassium sulfate (269 kg K/ha) significantly increased SDS
severity
• Vincelli, Doney and Powell (1994) evaluated sulfur, lime, and KCl
• significant suppression of O. herpotricha from applications of
elemental sulfur at rates of from 6.9 to 10.4 lbs/M
• concomitant with reduction in soil pH
7. O. herpotricha O. korrae
Spring dead spot is caused by three Do these species respond to
management practices
species of Ophiosphaerella similarly?
9. Research Objectives: Spring Dead Spot
Management
1. Determine the effects of nitrogen source and fall fertilization
practices on spring dead spot development in bermudagrass
fairways/athletic fields
10. Research Objectives: Spring Dead Spot
Management
1. Determine the effects of nitrogen source and fall fertilization
practices on spring dead spot development in bermudagrass
fairways/athletic fields
2. Evaluate fungicides for preventive control of spring dead spot in
inoculated plots
11. Research Objectives: Spring Dead Spot
Management
1. Determine the effects of nitrogen source and fall fertilization
practices on spring dead spot development in bermudagrass
fairways/athletic fields
2. Evaluate fungicides for preventive control of spring dead spot in
inoculated plots
3. Compare and contrast the response of O. korrae and O. herpotricha
to the above management practices
12. Bermudagrass Establishment and Inoculation
• 10,000 ft2 plot established
with ‘Tifway’ sprigs on
Appling fine sandy loam
• 5’ x 10’ plots inoculated with
O. korrae and O. herpotricha
in October 2004
• at each inoculation point, 10
cc of infested ryegrain was
placed underneath a 2”-
deep cup-cutter plug
13. Bermudagrass Establishment and Inoculation
• 10,000 ft2 plot established 1.52 m
with ‘Tifway’ sprigs on
Appling fine sandy loam
Ok Oh
• 5’ x 10’ plots inoculated with
O. korrae and O. herpotricha
in October 2004 Ok Oh
3.05 m
• at each inoculation point, 10
cc of infested ryegrain was
placed underneath a 2”- Ok Oh
deep cup-cutter plug
14. Bermudagrass Establishment and Inoculation
• 10,000 ft2 plot established
with ‘Tifway’ sprigs on
Appling fine sandy loam
• 5’ x 10’ plots inoculated with
O. korrae and O. herpotricha
in October 2004
• at each inoculation point, 10
cc of infested ryegrain was
placed underneath a 2”-
deep cup-cutter plug
15. Bermudagrass Establishment and Inoculation
• 10,000 ft2 plot established
with ‘Tifway’ sprigs on
Appling fine sandy loam
• 5’ x 10’ plots inoculated with
O. korrae and O. herpotricha
in October 2004
• at each inoculation point, 10
cc of infested ryegrain was
placed underneath a 2”-
deep cup-cutter plug
16. Bermudagrass Establishment and Inoculation
• 10,000 ft2 plot established
with ‘Tifway’ sprigs on
Appling fine sandy loam
• 5’ x 10’ plots inoculated with
O. korrae and O. herpotricha
in October 2004
• at each inoculation point, 10
cc of infested ryegrain was
placed underneath a 2”-
deep cup-cutter plug
17. Experiment 1: Nitrogen Source and Fall Fertilization
Nitrogen Sources (Main Plots) Fall Fertilizers (Subplots)
• 1 lb N applied 4X per year • applied in Sept and/or Oct each
1. ammonium sulfate year
2. calcium nitrate 1. dolomitic lime (10 lb, 1 app)
3. sulfur coated urea 2. elemental sulfur (2 lb, 1 app)
4. urea 3. gypsum (10 lb, 1 app)
4. potassium chloride (1 lb, 1
- Split-plot, randomized complete block app)
with 4 replications 5. potassium chloride (0.5 lb, 2
- Treatments initiated in May 2006 apps)
- Applied to same plots in 2006, 2007, 6. potassium chloride (1 lb, 2
and 2008
apps)
- entire study fertilized with 0.33 lb P and
0.66 lb K at time of each N application
18. Experiment 2: Preventive Fungicide Applications
Fungicide Treatments Application Details
1. Banner Maxx (4 fl oz, 2 apps) • randomized complete block with 4
2. Eagle (2.4 fl oz, 2 apps) replications
3. Headway (3 fl oz, 2 apps) • fungicide treatments were applied
in September and/or October in
4. Heritage (0.4 oz, 2 apps)
2006, 2007, and 2008
5. Lynx (2 fl oz, 2 apps)
• applications made in water
6. Rubigan (6 fl oz, 1 app) equivalent to 5 gallons per 1000 ft2
7. Rubigan (4 fl oz, 2 apps)
• CO2 powered sprayer at 40 psi
8. Rubigan (6 fl oz, 2 apps) using TeeJet 8004 nozzles
19. Assessment of Spring Dead Spot Severity
• average diameter of each patch
recorded at 100% greenup
• digital image of each plot
captured from overhead for
digital analysis of disease
incidence
• SEVERITY INDEX (Average
Patch Diameter x Disease
Incidence) calculated separately
for O. korrae and O. herpotricha
20. Assessment of Spring Dead Spot Severity
• average diameter of each patch
recorded at 100% greenup
• digital image of each plot
captured from overhead for
digital analysis of disease
incidence
• SEVERITY INDEX (Average
Patch Diameter x Disease
Incidence) calculated separately
for O. korrae and O. herpotricha
21. Assessment of Spring Dead Spot Severity
• average diameter of each patch
recorded at 100% greenup
• digital image of each plot
captured from overhead for
digital analysis of disease
incidence
• SEVERITY INDEX (Average
Patch Diameter x Disease
Incidence) calculated separately
for O. korrae and O. herpotricha
22. Assessment of Spring Dead Spot Severity
• average diameter of each patch
recorded at 100% greenup
• digital image of each plot
captured from overhead for
digital analysis of disease
incidence
• SEVERITY INDEX (Average
Patch Diameter x Disease
Incidence) calculated separately
for O. korrae and O. herpotricha
23. Additional Data Collection (Fertility Study Only)
• leaf tissue samples collected from
each plot with a reel mower in mid-
September 2006, 2007 and 2008 for
nutrient analysis
• soil samples collected from each
plot in December 2006, 2007 and
2008 for measurement of soil pH
using 1:1 soil:water ratio
25. Impact of Nitrogen Source on O. herpotricha
90
Sulfur Coated Urea a a
Calcium Nitrate a
75 Urea
a
Spring Dead Spot Index
Ammonium Sulfate
(diameter*incidence)
60
a
a
45 a a
a
b
a a b
a
30 ab
b ab
b
15 b
b b
b
0
c
c
2007 2008 2009
Waller-Duncan k-ratio t-
test
26. Impact of Nitrogen Source on O. korrae
30
Sulfur Coated Urea
Calcium Nitrate a
25 Urea
a
Spring Dead Spot Index
Ammonium Sulfate
(diameter*incidence)
a
20 a a
a
15
a a a a b
a
10
ab
b
ab
5
a ab
a b
a b b
0 c
2007 2008 2009
Waller-Duncan k-ratio t-
test
28. Pearson Correlation Coefficients
log (spring dead spot index)
Factor O. herpotricha O. korrae
r=0.31 r=-0.45
soil pH
p=<0.0001 p<0.0001
r=-0.10 r=-0.07
N
p=0.88 p=0.3080
r=0.21 r=0.02
P
p=0.0016 p=0.7748
r=0.08 r=0.04
K
p=0.2448 p=0.5779
r=0.21 r=-0.36
Ca
p=0.0014 p=<0.0001
r=0.23 r=0.07
Mg
p=0.0006 p=0.3309
r=0.11 r=0.04
S
p=0.0996 p=0.5471
r=-0.08 r=-0.06
Fe
p=0.2428 p=0.4051
r=-0.29 r=0.28
Mn
p=<0.0001 p=<0.0001
r=-0.005 r=0.24
Zn
p=0.9443 p=0.0003
r=0.06 r=0.17
Cu
p=0.3665 p=0.0123
29. Pearson Correlation Coefficients
log (spring dead spot index)
Factor O. herpotricha O. korrae
r=0.31 r=-0.45
soil pH
p=<0.0001 p<0.0001
r=-0.10 r=-0.07
N
p=0.88 p=0.3080
r=0.21 r=0.02
P
p=0.0016 p=0.7748
r=0.08 r=0.04
K
p=0.2448 p=0.5779
r=0.21 r=-0.36
Ca
p=0.0014 p=<0.0001
r=0.23 r=0.07
Mg
p=0.0006 p=0.3309
r=0.11 r=0.04
S
p=0.0996 p=0.5471
r=-0.08 r=-0.06
Fe
p=0.2428 p=0.4051
r=-0.29 r=0.28
Mn
p=<0.0001 p=<0.0001
r=-0.005 r=0.24
Zn
p=0.9443 p=0.0003
r=0.06 r=0.17
Cu
p=0.3665 p=0.0123
30. Pearson Correlation Coefficients
log (spring dead spot index)
Factor O. herpotricha O. korrae
r=0.31 r=-0.45
soil pH
p=<0.0001 p<0.0001
r=-0.10 r=-0.07
N
p=0.88 p=0.3080
r=0.21 r=0.02
P
p=0.0016 p=0.7748
r=0.08 r=0.04
K
p=0.2448 p=0.5779
r=0.21 r=-0.36
Ca
p=0.0014 p=<0.0001
r=0.23 r=0.07
Mg
p=0.0006 p=0.3309
r=0.11 r=0.04
S
p=0.0996 p=0.5471
r=-0.08 r=-0.06
Fe
p=0.2428 p=0.4051
r=-0.29 r=0.28
Mn
p=<0.0001 p=<0.0001
r=-0.005 r=0.24
Zn
p=0.9443 p=0.0003
r=0.06 r=0.17
Cu
p=0.3665 p=0.0123
31. Pearson Correlation Coefficients
log (spring dead spot index)
Factor O. herpotricha O. korrae
r=0.31 r=-0.45
soil pH
p=<0.0001 p<0.0001
r=-0.10 r=-0.07
N
p=0.88 p=0.3080
r=0.21 r=0.02
P
p=0.0016 p=0.7748
r=0.08 r=0.04
K
p=0.2448 p=0.5779
r=0.21 r=-0.36
Ca
p=0.0014 p=<0.0001
r=0.23 r=0.07
Mg
p=0.0006 p=0.3309
r=0.11 r=0.04
S
p=0.0996 p=0.5471
r=-0.08 r=-0.06
Fe
p=0.2428 p=0.4051
r=-0.29 r=0.28
Mn
p=<0.0001 p=<0.0001
r=-0.005 r=0.24
Zn
p=0.9443 p=0.0003
r=0.06 r=0.17
Cu
p=0.3665 p=0.0123
32. Prevention of Spring Dead Spot with Fungicides
• significant fungicide effects were Rubigan (6 fl oz, 1X) Untreated
detected in 2007 (p=0.0017) and
2008 (p=0.0098), but not in 2009
(p=0.1264)
• a significant fungicide x species
interaction was detected in 2007
(p=0.0042) due to low index
values induced by O. korrae
• no significant fungicide x species
interaction was detected in 2008
(p=0.1111) or 2009 (p=0.0727)
33. Prevention of Spring Dead Spot with Fungicides
Spring Dead Spot Index (diameter*incidence)
Dunnett’s
Test
34. Prevention of Spring Dead Spot with Fungicides
Banner Maxx (4 fl oz, 2X)
Eagle (2.4 fl oz, 2X)
Headway (3 fl oz, 2X)
Heritage (0.4 oz, 2X)
Lynx (2 fl oz, 2X)
Rubigan (6 fl oz, 1X)
Rubigan (4 fl oz, 2X)
Rubigan (6 fl oz, 2X)
Untreated
0 5 10 15 20 25
Spring Dead Spot Index (diameter*incidence)
Dunnett’s
Test
35. Prevention of Spring Dead Spot with Fungicides
Banner Maxx (4 fl oz, 2X) *
Eagle (2.4 fl oz, 2X) *
Headway (3 fl oz, 2X) *
Heritage (0.4 oz, 2X)
Lynx (2 fl oz, 2X) *
Rubigan (6 fl oz, 1X) *
Rubigan (4 fl oz, 2X) *
Rubigan (6 fl oz, 2X) *
Untreated
0 5 10 15 20 25
Spring Dead Spot Index (diameter*incidence)
Dunnett’s
Test
36. Prevention of Spring Dead Spot with Fungicides
Banner Maxx (4 fl oz, 2X) *
Eagle (2.4 fl oz, 2X) *
*
Headway (3 fl oz, 2X) *
*
Heritage (0.4 oz, 2X)
Lynx (2 fl oz, 2X) *
*
Rubigan (6 fl oz, 1X) *
*
Rubigan (4 fl oz, 2X) *
*
Rubigan (6 fl oz, 2X) *
*
Untreated
0 5 10 15 20 25
Spring Dead Spot Index (diameter*incidence)
Dunnett’s
Test
38. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
39. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
• O. korrae was effectively suppressed by calcium nitrate
40. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
• O. korrae was effectively suppressed by calcium nitrate
• O. herpotricha was suppressed most effectively by ammonium sulfate
41. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
• O. korrae was effectively suppressed by calcium nitrate
• O. herpotricha was suppressed most effectively by ammonium sulfate
• O. korrae was negatively correlated with soil pH and foliar Ca content,
whereas O. herpotricha was positively correlated with these factors
42. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
• O. korrae was effectively suppressed by calcium nitrate
• O. herpotricha was suppressed most effectively by ammonium sulfate
• O. korrae was negatively correlated with soil pH and foliar Ca content,
whereas O. herpotricha was positively correlated with these factors
• Fall applications of potassium, dolomitic lime, gypsum, and elemental
sulfur had no effect on either spring dead spot pathogen
43. Conclusions: Fertilization Programs and Preventive
Fungicides for SDS Management
• Spring dead spot pathogens exhibited a differential response to nitrogen
sources
• O. korrae was effectively suppressed by calcium nitrate
• O. herpotricha was suppressed most effectively by ammonium sulfate
• O. korrae was negatively correlated with soil pH and foliar Ca content,
whereas O. herpotricha was positively correlated with these factors
• Fall applications of potassium, dolomitic lime, gypsum, and elemental
sulfur had no effect on either spring dead spot pathogen
• Spring dead spot pathogens responded similarly to preventive fungicide
applications
44. Acknowledgements
Technical Assistance • Bob Erickson
• Michael Soika • Lake Wheeler Turfgrass
• Lee Butler Field Lab
• Casey Reynolds
• Jim Kerns Financial Support
• David Lee • North Carolina Turfgrass
Foundation
• Patrick Gregg
• Center for Turfgrass
• Joseph Roberts
Environmental Research
• Troy Taylor
and Education at NC State
NC STATE TURFGRASS PATHOLOGY