B. Suguna, B. Vajantha, G.P. Leelavathy, U. Vineetha and M.V.S. Naidu
Abstract
A study was carried out during 2021-22 in SPSR Nellore district of Andhra Pradesh, India to know the impact of major cropping systems on soil chemical properties. A total of 240 soil samples (120 surfaces and 120 sub-surface) under six major cropping systems viz., paddy-paddy, fallow-paddy, groundnut-paddy, paddy-cotton, paddy-greengram and paddy-blackgram were collected and analysed for chemical properties. The results revealed that the highest available N, P and K was noticed with paddy-blackgram cropping system in surface and sub-surface soils (259 and 230 kg ha-1 of available N, 46.87 and 42.07 kg ha-1 of available P, 448 and 429 kg ha-1 of available K, respectively). The lowest available nitrogen was observed in paddy-cotton (126 kg ha-1) cropping system in surface soils and paddy-paddy (109 kg ha-1) cropping system in subsurface soils, available phosphorus reported lowest in soils of paddy-cotton cropping system (24.51 and 19.98 kg ha-1) in both surface and sub-surface soils, respectively and available potassium recorded lower in paddy-paddy cropping system (271 and 245 kg ha-1) in both surface and sub-surface soils, respectively.