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THE INFLUENCE OF SOIL TYPE ON THE RESPONSE OF MAIZE TO UREA IN GLASSHOUSE EXPERIMENTS
Author(s) -
COURT M. N.,
DICKINS J. C.,
STEPHEN R. C.,
WAID J. S.
Publication year - 1963
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1963.tb00950.x
Subject(s) - soil water , urea , chemistry , agronomy , biuret test , ammonium , organic matter , greenhouse , dry matter , ammonium nitrate , nitrogen , nitrate , cation exchange capacity , ammonia , zoology , environmental science , soil science , biology , organic chemistry
Summary A greenhouse experiment compared the effects of ammonium nitrate and urea (1 per cent biuret), applied to forty‐two soils, on the growth and yield of maize foliage. Dry‐matter yields of maize in most soils were similar when both sources supplied 0·15 g or 0·30 g N per pot. At 0·45 and 0·60 g N per pot plants in soils with urea yielded less than with ammonium nitrate in sixteen and nineteen soils respectively. Urea adversely affected plant development to a greater extent in light soils than in heavy soils and peats. A partial correlation analysis indicated that responses to urea at the two higher rates of application were positively correlated with ammonia absorption capacity and a correlation with clay content was indicated. No significant partial correlations were obtained with organic matter content, pH, exchangeable‐hydrogen, cation‐exchange capacity, and moisture content.