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Allelopathy is the chemical inhibition of one plant (or other organism) by another, due to the release into the environment of substances acting as germination or growth inhibitors.
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Introduction
enlist of problematic soil
Salt affected soil
Characteristic of salt affected soil
Comparison between salt affected soil
Reclamation of Saline soils
Reclamation of sodic soils
Reclamation of saline-sodic soils
Acidic soils
Reclamation of acidic soil
Acid Sulphate soils and its management
Calcareous soil
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Introduction
enlist of problematic soil
Salt affected soil
Characteristic of salt affected soil
Comparison between salt affected soil
Reclamation of Saline soils
Reclamation of sodic soils
Reclamation of saline-sodic soils
Acidic soils
Reclamation of acidic soil
Acid Sulphate soils and its management
Calcareous soil
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Situation of land holding in India….
Problems….
Solution….
-Multi layer farming….
Project introduction
Selected crop information
Project description
Basic principle of multi-layer farming
Benefits of multi layer farming
Conclusion
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http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
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2. Common Problems in sloping agriculture land
1. Degradation of land
2. Top soil erosion leading to nutrient losses.
3. Declining crop yield
4. Increasing food insecurity
3. SALT
• There are several traditional ways of controlling soil erosion, such as
reforestation, terracing, multiple cropping, contouring and cover
cropping.
• The Asian Rural Life Development Program has developed an erosion
control technique that is both easier and less expensive to implement than
the traditional methods. This technology is known as SALT Sloping Land
Agricultural Technology.
• SALT is a package technology on soil conservation and food production,
integrating different soil conservation measures in just one setting .
• Basically, SALT is a method of growing field and permanent crops in 3-
meter to 5-meter wide bands between contoured rows of nitrogen fixing
trees are thickly planted in double rows to make hedgerows.
• When a hedge is 1.5 to 2 meters tall, it is cut down to about 40
centimeters and cuttings (tops) are placed in alleyways to serve as
organic fertilizers.
4. SALT: An agroforestry scheme
• SALT is a diversified farming system which can be considered
agroforestry since rows of permanent shrubs like coffee, cacao,
citrus and other fruit trees are dispersed throughout the farm
plot.
• The strips not occupied by permanent crops, however, are
planted alternately to cereals (corn, upland rice, sorghum, etc.) or
other crops (sweet potato, melon, pineapple, castor bean, etc.)
and legumes (soybean, mung bean, peanut, etc.).
• SALT also includes planting of trees for timber and firewood on
surrounding boundaries. Examples of trees species for
“boundary forestry in SALT are sesbanias, cashew nuts, etc.
5. History of SALT
• In 1971, the Asian Rural Life Development Program conducted
by Mindanao Baptist Rural Life Center (MBLRC)started to
employ contour terraces in the Philippines.
• From testing different intercropping schemes and observing ipil-
ipil based farming systems in Hawaii and at the Center, the
SALT was finally verified and completed in 1978.
6. Objective of SALT
• Conversion of hilly land to green and stable land.
• To increase productivity of slopy land.
• To enrich the soil and reduce soil erosion and replace the eroded
hillside with terraced green landscape.
• To conserve soil moisture.
• To reduce pest and diseases and reduce the need for expensive
inputs such as chemical fertilizers.
7. Advantages of SALT
• It is a simple, applicable, low-cost, and timely method of
farming upland.
• It is a technology developed for farmers with few tools, little
capital, and little learning in agriculture.
• Contour lines are run by using an A-frame transit that any farmer
can learn to make and use.
• A farmer can grow varieties of crops he is familiar with and old
farming patterns can be utilized in the SALT system.
8. Observations made about SALT
• SALT is for small family farm raising both animals, food crops
and permanent crops.
• The farmers’ income is increased by 3 folds only after 5 years.
• This technology is now accepted throughout many hilly
countries across the globe.
• MBLRC was awarded ‘Roman Magassase Award’.
• SALT has been modified over years and different types of SALT
has been evolved.
9. The Ten Steps of
Sloping Agricultural Land Technology
Step One : Make An A-Frame
• Students have already dealt in the practicals.
10. Step Two: Locate Contour Lines
• Try to locate as many contour lines as possible.
• The contour lines should be spaced from 4-6 m in steep slopes
and 7-10 m in gradual slopes.
11. Step Three: Prepare the Contour Lines
• After the contour lines are found, they are prepared by plowing
and harrowing until ready for planting.
• The width of the area to be prepared should be one meter.
12. Step Four: Plant Seeds of Nitrogen Fixing hedge rows or shrubs
• On each prepared contour line make 2 furrows 50 cm apart.
• Plant at least 2-3 seeds per hill at a distance of 1 cm between hills. Cover
the seeds firmly with soil. (Ipil-ipil seeds should be soaked overnight in
water before planting.)
• The ability of nitrogen fixing plants to grow on poor soils and in areas
with long dry seasons makes them good plants for restoring forest cover
to watersheds, slopes and other lands that have been denuded of trees.
• Through natural leaf drop they enrich and fertilize the soil. In addition,
they compete vigorously with coarse grasses, a common feature of many
degraded areas that have been deforested or depleted by excessive
agriculture.
• Ipil-ipil (Leucaena leucocephala) is the best example of nitrogen fixing
trees for hedgerow on the SALT farm. Other examples of nitrogen fixing
trees are Flemingia congesta, Acacia villosa, Gliricidia sepium, Leucaena
diversifolia (the so-called acid-tolerant ipil-ipil).
13. Step Five: Cultivate Alternate Strips
• The space of land between the thick rows of nitrogen fixing
trees where the crops are planted is called a strip.
• If you wish to prepare the soil for planting before the nitrogen
fixing trees are fully grown, do it alternately, on strips 2, 4, 6, 8
and so on.
• Alternate cultivation will prevent soil erosion because the
unplowed strips will hold the soil in place.
• When the nitrogen fixing trees are fully grown, you can proceed
with cultivation on every strip.
14.
15. Step Six: Plant Permanent Crops
• Permanent crops may be planted at the same time the seeds
of nitrogen fixing trees are sown.
• Only the spots for planting are cleared and dug; later, only
ring weeding is employed until the nitrogen fixing trees are
large enough to hold the soil so full cultivation can begin.
• Coffee, banana, citrus, cacao, and others of the same height
are good examples of permanent crops.
• Tall crops are planted at the bottom of the hill while the
short ones are planted at the top.
16.
17. Step Seven: Plant Short - Term Crops
• Plant short and medium - term income producing crops between strips of
permanent crops as a source of food and regular income while waiting for
the permanent crops to bear fruit.
• Suggested short and medium – term crops are pineapple, ginger, castor bean,
peanut, mung bean, melon, sorghum, corn, upland rice, etc.
• To avoid shading, short plants are planted away from tall plants.
18.
19. Step Eight: Trim Nitrogen Fixing Hedge rows
• About once a month the continuously growing N-fixing trees are cut down
at a height of one to one and a half meters from the ground.
• Cut leaves and twigs are always piled at the base of the crops. They serve
as an excellent organic fertilizer for both the permanent and short – term
crops.
• In this way only a minimal amount of commercial fertilizer ( about ¼ of
the total fertilizer requirements) is necessary.
20. Step Nine: Practice Crop Rotation
• A good way of rotating is to plant grains ( corn, upland rice,
sorghum, etc.), tubers (cassava, gabi, etc.) and other crops
(pineapple, castor bean, etc.) on strips where legumes
(mung bean, peanut, etc.) were planted previously and vice
versa.
• This practice will help maintain the fertility and good
condition of your soil.
• Other management practices in crop growing like weeding
and pest and insect control should be done regularly.
21.
22. Step Ten: Build Green Terraces
• Apart from providing adequate food and sufficient income,
another more important benefit of using SALT is the control
of soil erosion.
• This is done by the double thick rows of nitrogen fixing
trees and the natural terraces being formed along the
contour lines of the hill.
• As you go on farming the sloping land, keep gathering and
piling up straw, stalks, twigs, branches, leaves, rocks, and
stones at the base of the rows of nitrogen fixing trees.
• By doing this regularly as the years go by, you can build
strong, permanent, naturally green and beautiful terraces
which will reliably anchor your precious soil in its right
place.
23.
24. SALT economics
• Location: Kinuskusan, Bansalan, Davao del Sur
• Area: 1 hectare
• Slope: 25%
• Climate: Type D (with about 100-125 inches rainfall per year)
• Soil: Miral Clay Loam
• pH: 5.5; low N: low P: Medium K
• Total length of Ipil-ipil hedgerows = 1,804 linear meters
• Ipil-ipil yield of 1 linear meter = 1 kilo green leaves
• Ipil-ipil yield per harvest per hectare = 1,804 kilos of green leaves
25. One year harvest of ipil-ipil =
a. 258.5 kilos of N or about 11 bags of Urea
b. 120.2 kilos of P about 12 bags of 0-20-0 (Solophos)
c. 90.1 kilos of K or about 3 bags of 0-0-60 (Muriate of Potash)
Corn yield per hectare:
a. Without fertilizer = 1.5 tons
b. With ipil-ipil only = 3.3 tons
c. With commercial fertilizer = 4.3 tons (100-50-0)
Per P=1.00 investment SALT will give you a net return about:
a. P= 0.05 or 5% during the first year
b. P= 1.04 or 104% during the second year
c. P= 1.31 or 131% during the third year
d. P= 2.07 or 207% during the fourth year
e. P= 4.15 or 415% during the fifth year
26. Characteristics of various SALT models
Production sys SALT1 SALT 2 SALT 3 SALT 4
Also called Small Agro-
livestock Land
Technology
Sustainable
Agroforest Land
Technology
Base crop Staple food
crops
Fodder crops Trees Fruit crops
Major product Food grains Meat, milk,
manure
Fodder, fuel,
timber
Fruits
Planting area
a. Staple food
crop
75% 20% 20% 40%
b. Cash crop 25% 20% 20% 60%
c. Forage,
fodder
- 40% - -
d. Forestry - 20% 60% -
Source: Pratap and Watson (1994), ICIMOD