Diagnosis of nitrogen nutrition of spring wheat under conditions in the Irkutsk region

Kudyarov, V.N.; Rynks, I.N.

Agrokhimiya (4): 13-21

1967


ISSN/ISBN: 0002-1881
Accession: 014417685

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Abstract
Maximum unfertilized wheat yields (31.2 q/ha) were obtained on meadow chernozem soil, minimum (10.5 q/ha) on light-gray forest soil. PK had no effect on growth or yield on either soil, N(30-90kg/ha) PK affected growth positively, but only on the gray forest soil had it any effect on yield (from 17-23 q/ha with 60 kg/ha N). Nitrification was active in chernozem, especially at midsummer, and a negative correlation was found between N response and nitrate content of the top- and subsoil in spring.