Integrated Nutrient Management (INM) combines organic and inorganic sources to enhance soil fertility and crop productivity while maintaining ecological balance. It emphasizes the efficient use of fertilizers, organic manures, legumes, and biofertilizers to achieve nutrient balance and optimize crop yields. The approach aims to restore soil health, improve nutrient use efficiency, and sustain agricultural productivity.

1. INM - IPNS
PRESENTED BY,
VISHALI NS

2. INTRODUCTION
Integrated nutrient management (INM) is an age-old practice when almost all the
nutrient needs were met through organic sources to supply secondary and
micronutrients besides primary nutrients.
In scientific literature, a few terminology variants like integrated plant nutrient
supply (IPNS) and integrated nutrient supply and management (INSAM) are also
used to convey almost similar meaning as that of INM

3. DEFINITION OF IPNS
Integrated Plant Nutrition System is a holistic approach to plant nutrition by
obtaining the nutrients from both inorganic and organic sources to maintain and
sustain soil fertility and enhance crop productivity in a framework of an
ecologically compatible, socially acceptable and economically viable situation.
IPNS is used to maintain or adjust soil fertility and plant nutrient supply to
achieve a given level of crop production. This is done by optimizing the benefits from
all possible sources of plant nutrients.

4. NEED FOR INTEGRATED USE
❏ Organic manures sustain soil fertility at a low level of production.
❏ Chemical fertilizers have concentrated forms of nutrients.
❏ Application results in leaching,fixation and build-up of certain nutrients at the expense
of others,resulting in nutrient imbalances.
❏ Fertilizer use efficiency (FUE) is low in all chemical fertilizers and organic manure
when used singularly.
❏ Combine use of organic manures and chemical fertilizers increases FUE

5. OBJECTIVES OF IPNS
❏ Increasing the fertilizer use efficiency.
❏ Increasing the return to investment on fertilizers.
❏ To use a balanced system of crop nutrition management.
❏ To account for the different amounts of plant nutrients, in a budget sheet giving the
following:
1. Available in the soil.
2. Available from organic sources.
3. Available in crop residues.
4. Derived from biological fixation.
5. Derived from fertilizers and their residual effects.

6. COMPONENTS OF IPNS
Fertilisers, organic manures, legumes, crop residues, and bio-fertilisers are the main
ingredients of INM.
Suitable Organic Materials For IPNS
Many materials that are organic in nature are suitable for IPNS. Materials that can be used are
classified into:
i. Plant residues - Crop residues ,Green manure
ii. Animal wastes - Animal manure ,Slaughter house wastes.
iii. Compost - Consists of both plant and animal materials which are wastes which also includes
city garbage.

9. FERTILIZERS
❏ Fertilisers continued to be the most important ingredient of INM.
❏ Utilization of fertiliser nutrients by the crops vary from 30-50% in case of N,
15- 20% in case of P and less than 5% in case of micronutrients.
❏ The quantity of mineral fertilizers to be applied has to be decided on soil test
values for P and K.
❏ Correct application practices in basel and top dressing applications of both
organic and chemical fertilizer have to be adopted.

10. ORGANIC MANURES
❏ Organic manures like urban compost, FYM, crop residues, human excreta, city refuse,
rural compost, sewage-sludge, pressmud and other agroindustrial wastes have large
nutrient potential.
❏ Compost and FYM have traditionally been the important manures for maintaining soil
fertility and ensuring yield stability.
❏ Out of the cattle dung and other farmyard wastes recycled lack to the soil as manure,
substantial nutrients are lost due to faulty methods of manure preparation and its amount of
application.
❏ Organic manures not only supply macro and micronutrients, but also help improving the
physical, chemical and biological properties of the soils.

11. LEGUMES
❏ Legumes have a long-standing history of being soil fertility restorers due to
their ability to obtain N from the atmosphere in symbiosis with Rhizobia.
❏ Legumes could prove an important ingredient of INM when grown for grain or
fodder in a cropping system, or when introduced for green manuring.
❏ Legumes grown as green manure, forage or grain crops improved the
productivity of rice-wheat cropping system (RWCS) and rejuvenated soil
fertility .

12. BIOFERTILIZERS
Biofertilisers are the materials containing living or latent cells of agriculturally beneficial
microorganisms that play an important role in
❏ Improving soil fertility and
❏ Crop productivity due to their capability
❏ To fix atmospheric N,
❏ Solublize/mobilize P and
❏ Decompose farm waste resulting in the release of plant nutrients.

13. ❏ Bacterial cultures like Rhizobium, Azospirillium and Azotobacter have the ability to fix
atmospheric N which in turn increase N supply to the crops.
❏ Bacterial cultures of Pseudomonas and Bacillus species and fungal culture of
Aspergillus species help to convert insoluble P into plant usable forms and thus
improve phosphate availability to the crops.
❏ Similarly, fungi like Vesicular Arbuscular Mycorrhizae (VAM) increase nutrient
uptake particularly that of P due to increased contact of roots with larger soil volume.
❏ Rhizobium is the most well-known bacterial species that acts as the primary symbiotic
fixer of N
SOME OF THE BIOFERTILIZERS

14. CROP RESIDUES
❏ Rice straw, corn stover and
vegetable residues can be applied
directly or after composting.
❏ Direct application is difficult some
and due to high C:N ratio ofthe
materials, it takes a longer time to
decompose in the soil.

15. GREEN MANURES
Are of two types
❏ Which are grown in situ and ploughed into the soil.
❏ Lopped leaves and tender stems which are applied to the soil.
Grown insitu
❏ Plants like Crotalaria juncea and Sesbania rostrata can be grown before
establishing crops and ploughed in at flowering during land preparation.
❏ Soils with low content soil organic matter will lose more carbon if N high green
manure is used.

16. ANIMAL WASTES
Animal dung and urine of large animals found mixed with bedding and feed stuff are
used as farm yard manure (FYM). Poultry litter can be used both as a basal and top
dressing. The material content of the FYM and litter varies considerably on many
factors.
CITY GARBAGE
City garbage can be composted and used. It is high in extraneous materials like silica
but is a useful material if properly composted. It can be used for floriculture and fruit
culture in places close to cities.

17. ADVANTAGES OF IPNS
The advantages of INM can be broadly enumerated as
i) restoration and sustenance of soil fertility and crop productivity,
ii) prevention of secondary and micronutrient deficiencies,
iii) economizing in fertiliser use and improvement in nutrient use efficiency and
iv) favourable effect on the physical, chemical and biological health of soils

18. CONCLUSION
IPNS attempts to keep a balance between crop removal and nutrient addition to
the soil.Use of chemical fertilizers along withorganic manure gives a soil rich in
nutrients with good physical and microbiological properties. This will increase the
availability of nutrients.

19. REFERENCE
Vinod Kumar Sharma, Chiranjeev Kumawat and Rajendra Kumar Yadav. 2016 .
Integrated Nutrient Management: Concept and Components.
Roy, R.N. and Ange, A.L., In Integrated Plant Nutrition System (IPNS) and
Sustainable Agriculture, pp. SV/1-1-SV/1-12, FAI, New Delhi (1991).
Singh, M., Dwivedi, B.S. and Datta, S.P., Integrated nutrient management for
enhancing productivity, nutrient use efficiency and environmental quality. In: Soil
Science in the Service of Nation, pp. 55-67, ISSS, New Delhi (2012).

20. THANK YOU