0 Views
Department of Soil Science, S.V. Agricultural College, ANGRAU, Tirupati-517 502.
A field experiment was conducted at Regional Agricultural Research Station, Tirupati on groundnut based cropping systems during kharif and rabi 2023-24 under organic and ICM practices. Soil samples were collected at 0-15 and 15-30 cm and analysed for enzymatic activity. The higher urease activity (84.47 and 81.38 µg of NH +-N g-1 soil h-1), dehydrogenase activity (89.86 and 80.71 μg of TPF g-1 soil day-1), acid phosphatase activity (56.54 and 53.92 µg of NH +-N g-1 soil h-1) and alkaline phosphatase activity (76.15 and 73.90 µg of p-nitrophenol g-1 soil h-1) were noticed in organic farming (M1) compared to ICM practice (M2) at 0-15 and 15-30 cm, respectively. During kharif season, the higher mean pod (1813 kg ha-1) and haulm yield (3085 kg ha-1) were recorded in ICM practice compared to organic farming. Similarly, during rabi 2023-24, the higher mean pod /grain yield and groundnut pod equivalent yield was recorded in ICM practice (1995 kg ha-1 and 3646 kg ha-1) compared to organic farming. Among the groundnut based cropping systems adopted in the present study, the higher and lower pod yields (3127 kg ha-1 and 812 kg ha-1) were recorded in groundnut (S1) and blackgram (S2) crops, respectively. The higher pod equivalent yield (4811 kg ha-1) was recorded in groundnut-groundnut (S1) cropping system, followed by groundnut-blackgram (S2) (3038 kg ha-1) and whereas, the lowest was recorded in groundnut-foxtail millet (S4) cropping system (2653kg ha-1). Hence, groundnut-groundnut cropping system is superior over other cropping systems.
KEYWORDS: Cropping systems, groundnut pod equivalent yield, enzymatic activity.