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魯斗鉉,南基桓,沈在燮 충북대학교 엽연초연구소 1971 煙草硏究 Vol.1 No.-
This experiment was a split-plot design of 8 treatment with a combination of 3 levels of N, P and K fertilizers and 4 levels of 50% increase, 50% decrease, nullity and standard dressing (N:14, P:21, and K:28 per 10acr) per 8m2. Y.S.A was selected as a sample variety. The experiment plots were properly managed in accordance with the standard practices employed in the local tobacco fields. The results obtained are as follows: 1.No difference was among the treatments during the early stages of the disease occurence. 2.1.5N plots, K deficiency plots and 1.5N, 1.5P and 1.5K plots have shown the larger number of lesions than those of the standard plots. 3.1/2N, 1/2P and 1/2K plots, 1.5P plots, 1.5K plots and P deficiency plots showed almost no difference in the rate of disease occurence as compared with standard plots. Therefore, excess of N and K deficiency of fertilizers seemed to be closely related with tobacco brown spot disease infection.