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Studies on Blended Urea for Nitrogen Economy in Grain Sorghum
Author(s) -
More S. D.,
Birajdar K. B.
Publication year - 1986
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1986.tb00053.x
Subject(s) - urea , coated urea , sorghum , dry matter , chemistry , agronomy , nitrogen , fodder , zoology , biology , biochemistry , organic chemistry
A field experiment was conducted with sorghum variety CSH‐9 in kharif season of 1983 and 1984 to find out the efficiency of coated urea fertilizers over urea alone. The coated urea fertilizers used were neem cake coated urea, neem extract coated urea, coaltar coated urea, 10% didin coated urea along with ordinary urea. Four rates of urea application viz 50, 100, 125 kg N/ha were used along with control in single and split application. The dry matter yield was recorded to be higher with ordinary urea at initial growth stage of sorghum. However the coated urea fertilizers recorded more dry matter at advancing growth stages. The dry matter accumulation increased with increasing N rates. Split application of N registered higher dry matter. The grain yield was increased due to coating of fertilizers. The neem cake coated urea and 10 % didin coated urea produced highest grain yield which was about 1.5 times more over urea alone. The grain and fodder yields were increased with increasing N rates, the highest yields being with 120 kg N/ha application. N concentration in plant was decreased with advancing growth stage. The concentration, uptake and N recovery were highest with 10% didin coated urea in 1984 and with neem cake urea in 1983. Coated urea fertilizers and split application of N resulted in increasing the N use efficiency over single application.