The work of many investigators has demonstrated the fact that nitrate nitrogen disappears from soils to which organic materials of a high carbon-nitrogen ratio have been added. Doryland in 1916 claimed that soils have a definite nitrate consuming power and that additions of organic matter such as straw, dextrose, or other soluble sugars stimulated the disappearance of the nitrates. He attributed this disappearance to the fact that the nitrates were assimilated by microorganisms but not lost from the soil.
Proceedings of the Iowa Academy of Science
©1929 Iowa Academy of Science, Inc.
Pendleton, Ray A. and Smith, Frederick B.
"Studies on Methods of Measuring the Nitrate Assimilating Power of Soils,"
Proceedings of the Iowa Academy of Science, 36(1), 75-78.
Available at: https://scholarworks.uni.edu/pias/vol36/iss1/10