Effects of plant spacing on growth and yield of white yam (Dioscorea alata L.)
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Abstract
The cultivation of white yam (Dioscorea alata L.) at appropriate planting spacing can reduce production costs for farmers and increase crop productivity, income and economic value in the region. The purpose of this experiment was to study the appropriate plant spacing for white yam production. The experiment was designed in a randomized complete block design with five spacings and four replicates. The spacings were 100x100 cm, 100x80 cm, 80x80 cm, 80x50 cm and 50x50 cm. The experiment was conducted under field conditions at Chaiyaphum Agricultural Research and Development Center, Na Fai Subdistrict, Mueang District, Chaiyaphum Province, from April to December 2023. Data on growth parameters, tuber yield, production costs, income and the benefit-cost ratio (BCR) were recorded. White yam plant spacing significantly affected vine length, leaf width, leaf length, and leaf number. For white yam, a plant spacing of 50x50 cm resulted in the highest values for vine length, leaf width, leaf length and leaf number, and this spacing was also high for other growth parameters. The plant spacings were also differed significantly in the tuber yield of white yam. Planting white yam at 50x50 cm spacing gave the highest tuber yield and was the most rewarding investment. Planting white yam at 50x50 cm spacing was most suitable for white yam production, both in terms of yield and investment value.
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