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Loss of Nitrogen from Flooded Soil as Affected by Changes in Temperature and Reaction
Author(s) -
Willis William H.,
Sturgis M. B.
Publication year - 1945
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1945.036159950009000c0017x
Subject(s) - citation , baton rouge , nitrogen , library science , history , art history , chemistry , computer science , fin de siecle , organic chemistry
T nitrogen nutrition of rice has been studied by workers at the Louisiana Agricultural Experiment Station for the past 12 years. It has been repeatedly observed that rice growing in soils low in nitrogen fails to respond proportionately to the nitrogen added in fertilizers. The relatively low response of the crop to the added nitrogen has been explained as largely due to two causes, first, an increase in the growth of weeds which may use the nitrogen before the young rice is big enough to compete for it, and, second, the'loss of the nitrogen from the soil which may occur either by diffusion of soluble nitrogen into the irrigation water from which the rice plant cannot absorb it very effectively or by loss of the nitrogen completely through volatilization. It has been the purpose of this study to determine conditions and mechanisms of the loss of nitrogen from soil subjected to treatments similar to those found in rice fields. Obviously, the amount and forms of nitrogen, the moisture 'content, the temperature and the hydrogen-ion concentration of the. soil and water are of primary importance.