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The effects of rates of application and sources of nitrogen on nitrate concentration in oat forage
Author(s) -
JOSHI B. S.,
PRASAD RAJENDRA
Publication year - 1977
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1977.tb01436.x
Subject(s) - urea , nitrate , forage , chemistry , nitrogen , avena , ammonium nitrate , calcium nitrate , ammonium , zoology , agronomy , coated urea , dry matter , sulfur , calcium , biology , biochemistry , organic chemistry
A field experiment was conducted during the winter seasons of 1972–73 and 1973–74 to study the effects of rates of application (0, 100, 200 kg ha −1 ) and sources of nitrogen (ammonium sulphate, calcium ammonium nitrate, urea, sulphur‐coated urea and sulpha‐thiazole‐treated urea) on nitrate‐N concentration in oat ( Avena sativa L.) forage. N application increased the nitrate‐N concentration, the effects being more marked when the rate was increased from 100 to 200 kg ha −1 than when it was raised from 0 to 100 kg ha −1 . The highest nitrate‐N concentration in the dry matter (> 0·16%) was obtained when calcium ammonium nitrate was applied at 200 kg ha −1 N. Sulphur‐coated urea gave the lowest nitrate‐N concentration. In one year treatment of urea with sulphathiazole reduced nitrate‐N concentration in oats forage.