Evaluation of mature coconut water on soil nutrient availability and stimulation plant growth and yield of Greengram

Abstract

The pot culture study was conducted in completely randomized design (CRD) with nine treatments replicated three times. The surface soil (0-15 cm) collected from the field no 37, Eastern block, TNAU farm was utilised for the study. The recommended dose of fertilizers adopted was 25:50:25 N: P2O5:K2O kg per ha-1 and the test crop was greengram (Var. Co8). The mature coconut water (MCW) was added in the soil at the time of 0, 15, 30 and 45thdays after sowing. The highest soil available nitrogen (170.8 kg ha-1), phosphorus (33.2 kg ha-1)and potassium (1098 kg ha-1 ) was noticed in treatment T9 receiving MCW 2000 l ha-1.The application of mature coconut water resulted in increased number of pods per pot, grain yield and stover yield of Greengram. The number of pods per pot was observed to be highest (16.33) in T9 receiving MCW 2000L ha-1 and remained on par with T8 (16.33), T7 (16.33), T6 (16.00), and T5 (16.00) and T4 (15.67) receiving MCW 1750, 1500, 1250, 1000 and 750 L ha-1 respectively.