Effect of different levels of nitrogen and potash on the growth, yield and quality of tapioca variety, H-165

Abstract

An experiment was conducted at the College of Agriculture, Vellayani, with the object of studying the effect of different levels of nitrogen (50, 100 and 150 kg H per hectare) and potash (50 100 and 150 kg KgO per hectare) on the growth yield end quality of a high yielding variety of tapioca H-165. The experiment was carried out in a 5 factorial Randomised Block Design with four replication Nitrogen and potash were supplied in the form of ammonium sulphate and muriate of potash respectively. The results of the experiment are summarised hereunder:- 1. Basal dressing of nitrogen and potash increased the number of leaves and plant height. 2. Different levels of nitrogen significantly increased the number of leaves in the early stages of growth. The maximum number of leaves wee recorded a t 120th day after planting a t 150 kg H/hectare. 3. Nitrogen significantly increased the plant height at all stages of growth. The maximum height was recorded at harvest with 150 kg N/hectare. 4. There was increase In the number of leaves on 90th and 120th day after planting due to potash application. Maximum number of leaves was produced on 120th day after planting by 150 kg K2O per hectare. 5. The different levels of potash increased the plant height at all stages of growth except at 50th day after planting. She maximum height was recorded at harvest with 150 kg per hectare.