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Interpretive Summaries:
2012 - Site-Specific Nutrient Management for Rice-Wheat in Punjab
2011 - Site-Specific Nutrient Management for Rice-Wheat in Punjab
2010 - Site-Specific Nutrient Management for Rice-Wheat in Punjab
2009 - Site-Specific Nutrient Management for Rice-Wheat in Punjab
Site-Specific Nutrient Management for Rice-Wheat in Punjab, 2009
Punjab, with only 1.5% of the geographical area of India, contributes about 11% of rice production and 20% of wheat production in the country. This rice-wheat system is practiced in more than 60% of the cultivable area in the state. Current assessment of yield gaps showed that average yield of rice and wheat are 43% and 17% lower, respectively, than the maximum attainable yields observed in field experiments. Lack of site specificity and inadequacy of nutrient application is one of the main reasons for such yield gaps. Presently, wheat establishment under no-till is gaining popularity in the state. However, nutrient management strategies under such no-till systems are not well defined. The current work was initiated under the Cereal Systems Initiative in South Asia (CSISA) project to develop and implement site-specific nutrient management (SSNM) in this rice-wheat system with reference to both conventional and no-till establishment systems.
Farmer participatory trials (29) were initiated in wheat under conventional and no-till. Three different sets of trials are currently in progress in the state, including: 1) a nutrient omission trial to identify N, P, K supplying capacity of soils under different establishment practices, 2) a nutrient omission trial to estimate P and K draw down potential of soils under conventional system, and 3) a validation trial for the first version of a rice-wheat Nutrient Manager software system. This Nutrient Manager software is a fertilizer recommendation tool that is based on existing knowledge of SSNM. It is being developed to help extension workers implement SSNM in cereal crops in farmers’ fields even under situations where soil testing facilities are not available. The farmers’ field validation of the initial version of software will be helpful to understand the limitations of the current version, while inputs from the two types of omission plot trials are expected to help modify and improve its efficacy under different tillage practices. NWZ India-75
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