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The Recovery of Plowed‐Under Ammonium Sulfate by Corn
Author(s) -
Ohlrogge A. J.,
Krantz B. A.,
Scarseth G. D.
Publication year - 1944
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/sssaj1944.036159950008000c0035x
Subject(s) - agricultural experiment station , library science , agriculture , political science , engineering , management , geography , archaeology , computer science , economics
N ITROGEN is the limiting nutrient in the production of corn on many of the light-colored soils of the Midwest. Investigations during the past 5 years at the Purdue University Experiment Station (4)* have shown that plowed-under ammonium or ammonium-forming fertilizers are effective in supplying the needed nitrogen. One phase of .these investigations was concerned with the effect which the applied nitrogen had on the composition of the grain and stover. The composition gives information on.the physiology of the plant, and, in conjunction with the yield, gives the recovery of the applied nitrogen. Recovery data gives information on the efficiency of the method of application. Few data exist on the immediate recovery of nitrogenous fertilizers applied to corn in field experiments. Studies in nitrogen economy which have been reported may be classified into three groups, viz., (a) long-time fertility plots, (b) lysimeter tank and cylinder experiments, and (c) greenhouse experiments. The results from the long-time fertility experiments are generally subject to the greatest errors. The results from the cylinder and greenhouse experiments of New Jersey (3) and other states have indicated an approximate maximum of 60% recovery of the applied nitrogen in the aerial parts of the plant. Most investigators in field studies with crops other than corn have obtained about 40 to 50% recovery of the applied nitrogen.