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Nutrient
Management Issues
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Integrated
Nutrient Management (INM) is a major thrust area of research
for the Consortium partners. The activities in this area are
focused to develop a better understanding of the areas and extent
of yield declines, stagnating yields, and/or factor productivity
declines in the rice-wheat systems in the Indo-Gangetic Plains.
In addition, an improved understanding of changes in the soil
biological activity and physical properties that have occurred
in intensive rice-wheat production systems are being integrated.
This is expected to lead the development of effective soil nutrient
supply assays/tests that will lead to more effective fertilizer
recommendations/practices for rice-wheat systems. Another aspect
of INM research is to catalogue and standardize data collection
from long-term experiments in the region.
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Nutrient
management research is being carried at most of the sites and
the existing talent and infrastructure in the participating
NARS and IARCs are used to carry out the work. Additionally,
a more integrated system of nutrient management research at
selected sites based on multidisciplinary teams planning and
implementing activities is under process.
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Major
objectives of INM research are:
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To
determine the extent of, and the reasons for low yields,
declining yields, stagnating yields, or declining factor
productivity of rice-wheat systems
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To
understand the long- and short-term nutrient processes
that influence the maintenance and enhancement of soil
fertility and productivity of rice-wheat systems
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Develop
Site-Specific Nutrient Management (SSNM) practices for
optimizing nutrient use efficiency of all nutrient sources
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