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Influence of rates and sources of nitrogen on growth nitrogen uptake and yield of cotton gossypium hirsutum

Seshadri, V.; Prasad, R.

Zeitschrift fuer Pflanzenernaehrung und Bodenkunde 142(5): 731-739

1979


Accession: 005690762

Field experiments on cotton with different forms of urea applied at rates of 40 and 80 kg N/ha were carried out. Application of N increased plant height, dry matter accumulation, number of bolls per plant, seed cotton yield and N uptake. The proportion of dry matter and N in the stem was increased and that in the leaves was reduced by N application. S-coated urea (all applied at sowing) was about the same in effect as N-Serve treated urea and gave significantly more seed cotton yield than untreated urea, neem cake treated urea and S-coated urea (applied in 2 portions). N efficiency as expressed by kilogram seed cotton production per kilogram N applied was greater with 40 kg N/ha rate than with 80 kg N/ha. S-coated urea (all applied at sowing) gave the highest N efficiency, followed by N-Serve treated urea.

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