Macronutrient status and yield stability of arecanut (Kahikuchi) under integrated nutrient management practice in Assam
A long term field Â experiment was carried out in clay-loam soil at ICAR-CPCRI, Kahikuchi campus, Â Guwahati, Assam during 2000-2012 with arecanut variety Kahikuchi with seven Â nutrient combinations. The treatments included control (T1), 100 per cent Â vermicompost (T2), 200 per cent vermicompost (T3), 100 per cent chemical Â fertilizer (T4), 50 per cent vermicompost + 50 per cent chemical fertilizer Â (T5), 1/3rd vermicompost + 2/3rd chemical fertilizer Â (T6) and 2/3rd vermicompost + 1/3rd chemical fertilizer Â (T7). The treatment T7 produced highest fresh ripened arecanut yield of 16.7 Â kg i.e., about 3.6 kg dry chali per palm. Positive correlations were Â obtained between yield of arecanut and soil available N, P, K content. Â Significant and positive correlation was found between leaf N, P, K and Â available N, P, K content in surface and sub-surface soil. Available N, P and Â K content increased over the year under nutrient applied plot that reflected Â in yield of arecanut. The average yield in various treatments followed in the Â order of T7 > T5 = T6 > T2 = T3 > T4 > T1. The application of Â targeted, sufficient and balanced quantities of organic and inorganic Â fertilizer will be the need of the hour to make nutrients available for Â higher yield, soil fertility maintenance and agricultural sustainability Â without polluting environment.