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Effect of Rate of Nitrogen Application upon a Sudan Grass Green Manure Crop and Its Influence upon the Yield and Nitrogen Requirement of Potatoes 1
Author(s) -
Viets F. G.
Publication year - 1950
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1950.00021962004200110003x
Subject(s) - irrigation , crop , yield (engineering) , manure , nitrogen , agronomy , agriculture , mathematics , geography , chemistry , biology , archaeology , physics , organic chemistry , thermodynamics
Ibs./acre 3,240 5,920 6,300 6,240 2,520 ONLEGIJMES, particularly cereals, are frequently N used in the irrigated sections of the West as green manure and cover crops. Since they are easily and cheaply established, they may have a place in fitting the desert soils of the Columbia Basin for crop production under irrigation. These soils, generally coarse in texture and unag-' gregated, are inclined to blow when first plowed and leveled. Since they generally contain less than 1 % organic matter and only 0.03 to 0.04% total nitrogen, growing a nonlegunie and returning it to the soil may seriously reduce the nitrogen supplying power of the soil for the following crop. This paper reports the results obtained in two field experiments on widely differing soils in which Sudan grass was grown with various rates of nitrogen fertilizer in the summer of 1946. The following spring the Sudan grass was plowed under and early potatoes were plantecl. Animonium nitrate was applied to the potatoes at four rates on each of the nitrogen treatments previously applied to the Sudan grass. One experiment was conducted at the Umatilla Field Station, Hermiston, Oreg. on virgin Ephrata loamy fine sand. The other was located on Ritzville very fine sandy loam at the Irrigation Experiment Station, Prosser, Wash.