Effect of Organic Wastes and NPK Levels on Nutrient Uptake and Yield of Groundnut in Coastal Sandy Soil

摘要

An experiment was conducted in sandy soil to study the effect of organics and NPK levels on the nutrient uptake and yield of groundnut. The soil (0-15 cm) had the following characteristics viz., organic carbon- 0.27%, pH - 8.39, EC-1.61 dS m~(-1) available alkaline KMnO_4-N 128.32 kg ha Olsen P-10.23 kg ha1 and NH_4OAc-K 196.74 kg ha~(-1). Four levels of NPK viz., no NPK, NPK (100%), NPK (125%) and NPK (150%) were the treatments under Factor A. Different sources of organics viz., control, compostedcoir pith (CCP) @ 12.5 t ha ~(-1) and pressmud (PM) @ 12.5 t ha~(-1) were the treatments under Factor B. The treatments were replicated thrice in a Factorial Randomized Block Design (FRBD). The test crop was groundnut var. VRI2. The experimental resultsindicated that 150% NPK level among the inorganics and composted coirpith @ 12.5 t ha~(-1) was significantly superior in increasing the uptake of nutrients by groundnut. This treatment combination also proved efficient in increasing the yield of groundnut by recording 2196 and 2930 kg ha~(-1) of pod and haulm.