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Response of nodulating and nodulating peanuts arachis hypogaea to foliarly applied nitrogen


, : Response of nodulating and nodulating peanuts arachis hypogaea to foliarly applied nitrogen. Peanut Science 11(2): 60-63

Field experiments were conducted on Lakeland sand (Thermic, coated Typic Quartz-ipsaments) during 1981-1982 to determine the effect of foliarly applied N on yield, grade, and N, P, K, Ca and Mg concentration of leaves and seed of nodulating and non-nodulating peanut. Nodulating cultivars, Florunner, Early Bunch and Tifrun, and 3 non-nodulating experimental lines were sprayed 0, 1, 2 or 4 times at 13.5 kg N/ha beginning 28 days after emergence. Foliar application of N increased the yield of 'Florunner', 'Tifrun' and all non-nodulating lines, but had no effect on 'Early Bunch'. The addition of N to non-nodulating peanut increased the percent fancy pods, extra large kernels and weight of seed. Seed N concentration of non-nodulating lines increased with higher rates of N, but was higher in the nodulating cultivars. Seed of non-nodulating lines contained higher levels of P, K and Mg than seed of nodulating lines. Nodulating lines had higher concentration of leaf N than did non-nodulating lines. The leaves of the non-nodulating lines contained higher levels of P, Ca and Mg than those of the nodulating cultivars; whereas levels of K were higher for nodulating lines.

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