Abstract
Background: Irrigation and proper nutrient management that determines the productivity of the groundnut especially during the critical stages of the crop growth. Methods: The experiments laid out in split plot design comprising of three levels of irrigation scheduling [0.8 IW/CPE ratio (I1), 0.6 IW/CPE ratio (I2) and 0.4 IW/CPE ratio (I3)] in main plots and four nutrient management practices viz., N1- 75% of RDF with 5 t of charred rice husk, N2 - 50% of RDF with 5 t of charred rice husk, N3 - 75% of RDF with 5 t of charred rice husk along with seed treatment of Abuscular mycorrhiza and N4 - 50% of RDF with 5 t of charred rice husk along with seed treatment Arbuscular mycorrhiza in sub plots and replicated thrice. Result: Highest pod yield (2003, 2099 and 2063 kg ha-1 during summer, kharif and rabi 2017, respectively) of groundnut was registered with irrigation scheduling at 0.8 IW/CPE ratio along with 75% of RDF and 5 t of charred rice husk as basal with seed treatment of Arbuscular mycorrhiza. The maximum water use efficiency was also recorded under of the same treatment (4.16, 7.07 and 4.86 kg ha-1 mm-1 during the various seasons respectively). The highest B:C ratio of 2.2, 2.4 and 2.2 was recorded during summer, kharif and rabi 2017, respectively were also registered with same combination irrigation and nutrient management.
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