Effect of the base ratio of upland soils on the yield of mungbean
1986
Kim, J.C. | Ree, D.W. (Kyonggi Provincial Rural Development Administration, Hwasong (Korea R.)) | Park, Y.K. (Chungbuk National Univ., Chongju (Korea R.))
To provide useful information on the improving cultural practices of mungbean, investigations were made on Ca/Mg and K/ square root (Ca + Mg) ratio in soil and plant grown under three fertilizer levels of N, P, K with different upland soils, using variety, Kyonggijaerae 5. Highly significant possitive correlation was observed between the soil extracted molar Ca/Mg ratio, K/ square root (Ca + Mg) ratio at flowering time and yield, number of pods per plant, respectively. Soil extracted Ca/Mg ratio at flowering time ranged from 1.9 to 6.4 and K/ square root (Ca + Mg) ratio ranged from 0, 17 to 0.33. Yield decreased rapidly as extracted soil Ca/Mg ratio became smaller than the ratio of 3.9, and yield was the highest the K/ square root (Ca + Mg) ratio adjusted to 0.23 at flowering time
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