Effect of applied calcium-boron ratio on the availability of each to Radish (Raphanus sativus L.)
2007
Tariq, M. (NWFP Agricultural Univ., Peshawar (Pakistan). Dept. of Soil and Environmental Sciences) | Mott, C.J.B. (University of Reading (England). Dept. of Soil Science)
The present study was based on the hypothesis whether Ca/B ratio is significant in soil solution terms or in applied terms. A green house study was carried out in sandy heath land soil, growing radish (cv. French breakfast) as a test crop during 1997 at the University of Reading, England. The experiment was laid out in a randomized complete block design and replicated three times. Varying Ca/B ratios i.e. 2000:1, 1000:1, 500:1, 250:1, 125:1 and 25:1 were applied, corresponding to soil solution ratios 7959:1, 4369:1, 1035:1, 851:1, 486:1 and 45:1 along with a basal dose of all essential nutrients. Results revealed that significant treatment effects were observed in the growth response of radish plants and maximum fresh and dry matter yields were recorded Ca/B ratio of 1035:1 in soil solution or applied 500:1, corresponding to Ca/B ratio in tops and roots were found to be 187 and 41, respectively. The concentration of Ca decreased and B increase d significantly with decreasing the Ca/B ratio in the soil. While, the total uptake of Ca and B showed similar response to radish yield as affected by varying Ca/B ratio either in soil solution or applied. Direct correlations were found between the Ca/B ratio in the soil solution or applied with the Ca/B ratio in radish plants, suggested that both Ca/B ratios are significant from the soil fertility and plant nutrition point of view. Soil pH significantly increased as the Ca/B ratio in soil solution or applied decreases.
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