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Losses of Nitrogen from Solution Materials¹

ABSTRACT

The effect of temperature, soil moisture, and methods of application on the loss of ammonia from solutions of ammonium nitrate and ammonia in water have been measured in the laboratory and by wheat yields in the field. The loss of ammonia was increased as soil moisture was lowered and temperatures were raised. Losses were less when applied on soil than on crop residues. These solutions gave increases in wheat yields equivalent to solid forms of nitrogen when applied under the surface of the ground.

¹ Contribution from the Department of Soils, Missouri Agr. Exp. Sta., Journal Series No. 1478. Presented before Div. IV, Soil Science Society of America, St. Paul, Minn., Nov. 10, 1954.

² Assistant in Soils and Professor of Soils, respectively.

Received for publication October 20, 1954.