SITE SPECIFIC NUTRIENT MANAGEMENT FOR POTATO BASED CROPPING SYSTEMS IN SOUTHEREN TRANSITION ZONE OF KARNATAKA
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Date
2023-02-22
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University of Agricultural Sciences, Bangalore
Abstract
Field experiments were conducted on “Site specific nutrient management for potato based cropping systems in Southern Transition Zone of Karnataka” at Agricultural Research Station (ARS), Madenur, Hassan during Kharif and Rabi seasons of 2017 and 2018. The experiments were laid out in a randomized complete block design with twelve treatments in potato based sequential and eight treatments in potato + pigeon pea based intercropping systems replicated thrice. The results revealed that application of 50 % K through Bio-K + 50 % K through K2SO4 + balance NP through fertilizers for targeted yield of 25 t ha-1 recorded significantly higher potato equivalent yield of finger millet (29431 kg ha-1) and field bean (29945 kg ha-1) as compared to other treatments as influenced by site specific nutrient management in potato based sequential cropping systems. Higher nutrient uptake, gross returns (Rs.361984 and 361096), net returns (Rs.274820 and 269277) and B:C ratio (4.15 and 3.93) were observed in potato-finger millet and potato-field bean cropping systems, respectively. In potato + pigeon pea based intercropping system, 50 % K through Bio-K + 50 % K through K2SO4 + balance NP through fertilizers for targeted yield of 25 t ha-1 recorded significantly higher potato equivalent yield of finger millet
(27821 kg ha-1) and field bean (28386 kg ha-1) as compared to other treatments. Similar trend was observed in nutrient uptake, gross returns (Rs.340773 and 340180) net returns (Rs.258972 and 254655) and B:C ratio (4.17 and 3.98) were observed in potato + pigeon pea-finger millet and potato + pigeon pea-field bean cropping systems respectively. Thus it is concluded that supply of potassium through combination of Bio-K and K2SO4 under SSNM approach is beneficial and inclusion of pulses in the potato based cropping system was found to be effective in maintaining soil fertility, getting higher system productivity and economics.