Vol. 3 No. 1
Relative performance of complex and straight chemical fertilizer in conjunction with and without organic manure in Potato-Jute crops sequence.
Abstract: Field experiments were carried out during 1999-2002 in Entisol soil of nearly neutral reaction (pH 6.8), sandy clay loam in texture, of the instructional Farm of the Bidhan Chandra Krrishi Viswavidyala, West Bengal, India to evaluate the relative performance of two complex fertilizers and one straight nitrogenous fertilizer in conjunction with and without farm yard manure under potato jute crop sequential cropping system. Seven manurial treatments were applied to potato crop and two fertilizer doses given to jute crop in sequence. Altogether 14 treatment combinations replicated thrice in split plot design. Seven manurial treatments given to potato crop were in main plot and two fertilizer doses given to jute crop were in subplot. Except control treatment, all treatments of Potato crop received 150 kgN, 100 kg P2O5 and 100 kg K2O ha-1. Experiment was started with potato crop during 1999- 2000. In potato-jute sequential cropping maximum yield of potato tuber (24.96 t ha-1) and jute crop (4.63 tha-1) was recorded where potato crop received IFFCO NPK (10:26:26) along with 25% N as farm yard manure and jute crop was fertilized with 40 kg N, 20 kg P2O5 and 20 kg K2O ha-1. Both the crops in sequence when fertilized with same manual treatment earned maximum net return (Rs 48,578.00 per year) and return per rupee investment (Rs. 2.21). In addition to that total uptake of nitrogen, phosphorus and potassium by jute and potato crops in sequence per annum was also maximum (390.3 kg ha-1 year-1) under the same treatment conditions. Addition of farm yard manure in conjunction with complex (IFFCO NPK) mineral fertilizer tested in improvement of nitrogen (10.5%), phosphorus (6.4%) and potassium (4.3%) status of soil over the initial value after fifth crop in the cropping sequence.
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