tailieunhanh - An incubation experiment to study potassium fractions using azolla, vermicompost and muriate of potash as potassium sources in inceptisol of Bihar

To explore the suitability of various sources of potassium (K) application on K fractions (watersoluble K, Exchangeable K, 1 N HNO3 soluble K, Non-exchangeable K) through incubation study. An incubation experiment was conducted at department of soil science and agricultural chemistry, Bihar Agricultural University, Sabour, Bhagalpur in completely randomized block design with 8 treatments viz., T1 (no K application), T2 (50 per cent RDK), T3 (100 per cent RDK), T4 (150 per cent RDK), T5 (50 per cent RDK + 50 per cent K by Azolla), T6 (50 per cent RDK + 50 per cent K by vermicompost), T7 (100 per cent K by Azolla) and T8 (100 per cent K by vermicompost) replicated thrice and kept in incubator at 25 deg. Celsius and used to assess various forms of K in soil at 0, 35, 70 and 105 days of incubation. Full dose of N and P were applied in all the treatments through urea and SSP respectively. However, potassium was supplied through muriate of potash (MOP ; 60 per cent K2O), vermicompost ( per cent K) and Azolla ( per cent K on dry wt. basis). | An incubation experiment to study potassium fractions using azolla vermicompost and muriate of potash as potassium sources in inceptisol of Bihar