Vol. 12, Issue 7 (2023)

Author(s):
K Shekar, P Laxminarayana, G Manjulatha, G Padmaja and S Narender Reddy

Abstract:
Groundnut in different land configurations and phosphorus management in high phosphorus soils influenced the growth and yield. A field experiment was carried out at ARS, Karimnagar. PJTSAU in rabi, 2019-20 to investigate the impact of land configurations and phosphorus management in high phosphorus soils on the performance of groundnut. This was laid out in strip-split plot design and replicated four times. The main plots treatments were raised and flatbeds in the subplot, various phosphorus levels viz., as S_1: 100% RDP (60 kg ha^-1), S₂: 75% RDP (45 kg ha^-1), S₃: 50% RDP (30kg ha^-1), S₄: 25% RDP (15 kg ha^-1) and S₅: 0% RDP (0 kg ha^-1) applied to kharif maize and were sub divided into sub-sub plots to study residual effect of as P_1: 75% RDP (30kg ha^-1) and P_2: 50% RDP (20kg ha^-1) applied to groundnut. Study revealed that phosphorus management in high phosphorus soils under raised beds resulted significantly higher in plant growth (plant height, number of branches/plant), yield attributes (Number of pods plant^-1, shelling percentage), and pod yield. The experiment led to a notable increase in plant growth (plant height and number of branches per plan), yield attributes (pods per plant, shelling percentage) and pod yield. The higher pod yield (2654 kg/ha) recorded under raised beds over flatbeds (2203 kg/ha). Among the phosphorus management S₁ (100% RDP) has recorded higher pod yield (2638 kg/ha) which was on par with S₂ (2535 kg/ha) followed by S₃ (2448 kg/ha) which was on par with S₂. The lowest pod yield was recorded with S₅ (2190 kg/ha) followed by S₄ (2333 kg/ha). In groundnut application of P₂ (50% RDP) produced comparable growth, yield attributes and pod yield with that of application of P₁ (75% RDP) in high phosphorus soils.