The effects of nitrogen, potassium level, and planting density on the growth and productivity of cabbage (Brassica oleracea L. var. capitata) in summer.
1988
Kang C.K. | Oh E.Y. | Yoon P.S. | Lee D.W.
This experiment was conducted to investigate the effects of nitrogen, potassium level and planting density on growth and productivity of cabbage (Brassica oleracea L. var. capitata) in summer. The cabbage cv. Uzi no.1 was grown with 3 nitrogen levels (15, 30, and 45kg per 10a), 3 potassium levels (12, 24, and 36kg per 10a) and 3 row spacings (55, 65, and 75cm). Plants given 15, 30kg per 10a were smaller than those given nitrogen of 45kg per 10a in the no. of inner leaf, head height, head diameter, head weight, total fresh weight, and yield, while a little effect was found in potassium levels. Yield increased with higher nitrogen levels and at higher plant densities but average yield components were greater at wider spacing. As a conclusion, the optimum level of nitrogen, potassium, and plant density for maximum yield of summer cultiviation on cabbage is regarded as a best way to apply N 45kg, P 20kg, K 24kg per 10a and to transplant 55x45cm or 65x45cm plant density.
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