2. Integrated nutrient management means combined application of
different sources of plant nutrients like organic inorganic and
bio fertilisers for sustainable crop production without degrading
the natural resources on long term basis . The objective or aim to
integrate the use of natural and man made soil nutrients to
increase crop productivity and preserve soil productivity for future
generation .
3. ⸠INM involves maintenance or adjustment of plant nutrient supply to an optimum level for
sustaining the desired crop productivity.
⸠It involves proper combination of chemical fertilizers, organic manures, crop residues,
nitrogen fixing crops and bio-fertilizers suitable to the system of land use and ecological, social
and economic conditions.
WHY INM?
â˘Unbalanced use of N:P:K have caused deleterious long term effects on soil fertility and productivity.
â˘In intensive cultivation, application of mere chemical fertilizers (N:P:K)
ďźNot sufficient for sustaining the yields
ďźLeads to deficiency in the soil for secondary nutrients and
ďźDeficiency of micro-nutrients in the soil which limit crop productivity
â˘Use of organic manures, green manures, crop residue and biodegradable rural and urban waste
â˘Supplement the major nutrients.
â˘Increase the efficiency in other nutrients supply
â˘Leading to improvement in physical and biological properties of the soil
4. GOALS OF INM
ďź To maintain soil productivity To ensure productive and sustainable agriculture
ďź To reduce expenditure on cost of purchased inputs by using farm manure and crop
residues etc.
ďź To utilize the potential benefits of green manures, leguminous crops and bio-fertilizers
To prevent degradation of the environment
ďź To meet the social and economic aspirations of the farmers without harming the
natural resource base of the agricultural production
PRINCIPLES OF INM
ď In the soil, replenishment of chemicals removed by the crop
ď Maintenance of organic matter content in the soil
ď Avoidance of weeds, pests and diseases occurrence
ď Control of soil acidity and toxicity
ď Control of soil erosion by improving soil physical properties
8. OLD LEAVES
N, P, K, Mg, Mo
With Dead Spots
K, Mo
No Dead Spots
N, P, Mg
Green Veins
Mg
Yellow veins
N
NEW LEAVES
S, Fe, Mn, Cu
Green Veins
Fe, Mg
Yellow veins
S, Cu
OLD + NEW
LEAVES
Zn
TERMINAL
BUD
Ca, B
9. Soil source Crop variety , Cultural practises
Cropping system , Legumes
intercropping
organic
source
Organic Manure
FYM, poultry manure , Neem
cake , Vermicompost, Green
Manures, Crop residue,
Inorganic
source
Chemical Fertilizer
SSP, Urea, MOP, Micronutrients
IFFCO
Biological
source
Bio-fertilizers
Microbial inoculants
Components
of
INM
Soil
Source
In-
Organic
Source
Organic
Source
Biological
Source
18. Symptoms
Pale green or yellow leaves
Not enough chlorophyll
Symptoms begin in lower leaves
Very slow growth
19. Symptoms
leaf bronzing and mottling
Thin stems, Stunted or slow growth
Little or no fruit
Possible purple spots
20. Symptoms
Leaf distortion and curling
Older foliage may show marginal leaf scorch, distortion, curling and
premature drop
Late season blotchy or irregular pattern of chlorosis
Poorly developed root systems may result in lodging of cereals
21. Symptoms
Young leaves are light green to yellow
Plants are small and stunted
Delayed maturity
Uniform pale green chlorosis
Purple vein color
Purple and reddish pigmentation
22. Symptoms
Chlorosis (abnormally yellow color of plant tissues)
Leaves have a marbled appearance
Symptoms appear in older leaves
Necrosis and dropping of older leaves
Very small fruits and flowers
23. Symptoms
Death of terminal growth
Young meristematic tissues disintegrate
Leaves are thickened, curled and brittle
Poor seed-set
Poor fruit-set, reduced flowering
Tubers, fruits and roots may become discolored, cracked and
flecked with brown spots
Small, malformed fruit
24. Symptoms
Poor root development
External and internal disorders of many
fruits and vegetables
Premature shedding of blossoms and buds
Deformed terminal leaves and fruit
Dead terminal buds
25. Symptoms
Marginal leaf yellowing and chlorosis
Shoot die-back
Dead spots and brown areas on terminal leaves
Stunted growth, undersized fruit
Mild deficiency, reduced growth and yield
Severe deficiency, tip necrosis
Small, malformed fruit
26. Symptoms
Early season patternless paling in leaf color
Later season yellowing of leaves
Young leaves show chlorotic symptoms first, may develop
interveinal chlorosis
In grasses, alternate rows of green and white
Moderate deficiency, lower crop yield and quality
Severe deficiency, stunted growth
27. Symptoms
Leaves yellow between veins
Dead spots on severely affected leaves
Stunted growth
Severe deficiency may resemble severe magnesium deficiency
29. Symptoms
Pale yellow leaves, especially in legumes
Malformed leaves with normal midribs (âwhiptailâ of Brassicas)
Interveinal chlorosis, with a glassy appearance (âyellow spotâ of
citrus)
Death of vegetative growing point often accompanied by a
brown exudate
Stunted plants with shortened internodes
32. ⢠Soil physical properties - Improvement in soil granulation, porosity, water holding and
drainage capacity, aeration etc.
⢠soil health - Prevent deterioration of better tolerance to biotic and abiotic stresses.
⢠Enrichment of soil with beneficial soil micro organisms. Improves & sustain Physical, Chemical and
biological functioning of soil.
⢠Balanced nutrition - Balanced nutrition to the crops, better nutritional uptake and hence better
plant growth and yield
⢠Nutrient demand - Enhance the availability of nutrient. Improvement in the organic matter content
in the soil - Inorganic sources insufficient for nutritional needs. -
⢠Multiple nutrient deficiency - Maintenance of soil nutrients reserve. Minimize antagonistic effects of
nutrient imbalance.
⢠Pollution. - Reduced use of chemical fertilizers , reduce nutrient losses , reduces pollution of ground
water and environment.
⢠Use of available nutrient sources for sustainable agriculture -
⢠Enhance crop yield & improve produce's quality appearance, taste and nutritional richness.
⢠Fruitful utilization of farm wastes, organic sources are cheaply available minimize production cost &
residual effect remains beneficial to succeeding crops.