V.P. VAMSIDHAR*, A. PRASANTHI, Y. BALACHANDRA, N.V. SARALA AND M.V.S. NAIDU

Department of Soil Science and Agricultural Chemistry, S.V. Agricultural College, ANGRAU, Tirupati-517 502.

ABSTRACT

A field experiment was conducted on sandy clay loam soils at Wetland farm, ANGRAU, S.V. Agricultural College, Tirupati during rabi 2023-2024 in groundnut crop to study the effect of application of organic manure, chemical fertilizers and biofertilizer of potassium on potassium use efficiency in groundnut. The experimental results revealed that application of 75 per cent RDK through FYM + seed treatment with KRB @ 10 ml kg-1 seed + spraying of Multi K @1 per cent at 45 DAS (T₄), being statistically at par with application of 75 per cent RDK through MOP + soil application with KRB @ 1.25 L ha-1+ spraying of Multi K @1 per cent at pod development (T₇) and 50 per cent RDK through FYM and MOP each + soil application with KRB @

1.25 L ha-1(T₁₀)significantly promoted higher growth parameters viz., plant height, leaf area, dry matter production at all stages of crop, yield attributes viz., number of filled pods per plant, number of illfilled pods per plant, hundred pod weight, hundred kernel weight, shelling per cent age,pod yield(1690 kg ha-1) and haulm yield (3102 kg ha-1).

KEYWORDS: Potassium Use Efficiency, growth parameters and yield attributes.