Soil Nutrient Mapping for On-farm Fertility Management

Sahrawat, K L and Wani, S P and Chander, G and Pardhasaradhi, G and Krishnappa, K (2016) Soil Nutrient Mapping for On-farm Fertility Management. In: Harnessing Dividends from Drylands:Innovative Scaling up with Soil Nutrients. CABI, pp. 59-77. ISBN 9781780648156

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Feeding the projected population of 9.1 billion globally and 1.6 billion in India by 2050 is one of the greatest challenges of the century, and in this endeavour to ensure future food security, efficient soil nutrient management is crucial (Wani et al., 2003; Sahrawat et al., 2010; Chander et al., 2013). Since the era of the Green Revolution in India in the late 1960s, the focus has been on only three macronutrients, namely nitrogen (N), phosphorus (P) and potassium (K), and this has brought nutrient imbalances and widespread deficiencies of micro and secondary nutrients such as sulfur (S), boron (B) and zinc (Zn) in addition to macronutrients (Wani et al., 2009; Sahrawat and Wani, 2013; Chander et al., 2014). Most farmers and stakeholders are not aware of soil fertility issues and management alongside water and crop management, which is the main reason for large yield gaps in the semi-arid tropics (SAT). In order to ensure future food security and the future of smallholder farmers, science-led interventions are needed to bridge the yield gaps in the SAT. Some pilot initiatives such as the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)—Andhra Pradesh Rural Livelihood Programme (APRLP) initiative in Andhra Pradesh and the Bhoochetana initiative in Karnataka have shown that soil nutrient mapping is the best entry point activity to enhance productivity and livelihoods through soil-needbased fertility management (Wani et al., 2011; Chander et al., 2013; Sahrawat and Wani, 2013). This chapter therefore focuses on soil fertility management issues and the need of soil nutrient mapping for informed decisions...

Item Type: Book Section
Divisions: Research Program : Asia
Uncontrolled Keywords: Soil Nutrient Mapping, On-farm Fertility Management, Soil Infertility, Water Shortage, Soil Mappning, Soil Testing, Soil Analysis
Subjects: Others > Soil Fertility
Others > Soil
Others > Soil Science
Depositing User: Mr Ramesh K
Date Deposited: 14 Nov 2016 09:10
Last Modified: 14 Nov 2016 09:18
Acknowledgement: We thank the APRLP of Andhra Pradesh, the Department of International Development, UK, the World Bank Special Fund for Watershed Development, the Government of Karnataka and the Sir Dorabji Tata Trust for financial support. Thanks are also due to all farmers who participated in the studies reported in this chapter.
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