Soil Nutrient Mapping for On-farm Fertility Management uri icon

abstract

  • Feeding the projected population of 9.1 billion globally and 1.6 billionin India by 2050 is one of the greatest challenges of the century,and in this endeavour to ensure future food security, efficient soilnutrient management is crucial (Wani et al., 2003; Sahrawat et al.,2010; Chander et al., 2013). Since the era of the Green Revolution inIndia in the late 1960s, the focus has been on only three macronutrients,namely nitrogen (N), phosphorus (P) and potassium (K), andthis has brought nutrient imbalances and widespread deficiencies ofmicro and secondary nutrients such as sulfur (S), boron (B) and zinc(Zn) in addition to macronutrients (Wani et al., 2009; Sahrawat andWani, 2013; Chander et al., 2014). Most farmers and stakeholders arenot aware of soil fertility issues and management alongside water andcrop management, which is the main reason for large yield gaps inthe semi-arid tropics (SAT). In order to ensure future food securityand the future of smallholder farmers, science-led interventions areneeded to bridge the yield gaps in the SAT. Some pilot initiativessuch as the International Crops Research Institute for the Semi-AridTropics (ICRISAT)?Andhra Pradesh Rural Livelihood Programme(APRLP) initiative in Andhra Pradesh and the Bhoochetana initiative inKarnataka have shown that soil nutrient mapping is the best entry pointactivity to enhance productivity and livelihoods through soil-needbasedfertility management (Wani et al., 2011; Chander et al., 2013;Sahrawat and Wani, 2013). This chapter therefore focuses on soil fertilitymanagement issues and the need of soil nutrient mapping forinformed decisions

publication date

  • 2016