Abstract
An experiment was conducted at the College of Agriculture, Padannakkad (Kerala) to study the effect of integrated nutrient management practices and summer irrigation on growth and root yield of Ashwagandha (Withania somnifera L. Dunal.) The experiment was laid out in RBD with 14 treatments. The treatments were T1-HDP in trenches mulched with polythene and filled with enriched growing medium, T2-T1 + Recommended dose of NPK, T3-T1 + Liquid organic manures, T4-T2 + Azospirillum, T5-T3 + Azospirillum, T6-T4 + B and Mg, T7-T5 + B and Mg, T8-T6 + Summer irrigation at 15 mm CPE, T9-T7 + Summer irrigation at 15mm CPE, T10-T6 + Summer irrigation at 30mm CPE, T11-T7 + Summer irrigation at 30 mm CPE, T12 - HDP in trenches filled with enriched growing medium, T13- NRP in trenches filled with enriched growing medium, T14- Broadcasting in trenches fileld with enriched growing medium. The results revealed that high density planting of Azospirillum inoculated seedlings of Ashwagandha in trenches followed by basal dressing of recommended dose of NPK and, B and Mg application with summer irrigation at 30 mm CPE enhanced the growth and root yield and affected the highest benefit: cost ratio cultivation.
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