Micronutrient Dynamics in Soil under Integrated Thermochemical Organic Fertilizer Pellet Application

A soil incubation study was carried out in the Department of Soil Science and Agricultural Chemistry, to assess dynamics of micronutrient release. Soil pots were filled with 5 kg air-dried, 2 mm sieved soil. The study was laid in Completely Randomized Design with 5 treatments and 4 replications. Treatments were, T1: Pellet formulation 1; T2: Pellet formulation 2; T3: Pellet formulation 3; T4: FYM+NPK (RDF as per POP) and T5: Control (Soil alone). The Fe, Mn, Zn, Cu and B content of soil were 10.14 mg kg-1, 8.59 mg kg-1, 1.90 mg kg-1, 2.50 mg kg-1 and 0.30 mg kg-1, respectively. Three distinct pellet formulations P1, P2 & P3 were used in study based on thermochemical organic fertilizer (TOF). Fe, Mn and Zn exhibited a gradual and progressive release pattern throughout the incubation period. Whereas Cu and B availability showed a decreasing trend from the 15th day onwards. Highest Fe, Mn and Zn availability were observed towards the end of the incubation study. While the Cu and B recorded highest on the initial 15th day of incubation. Hence it can conclude that TOF based pellets significantly impact the micronutrient availability in soil compared to the FYM based and control treatment.