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Effect of Spacing in Winter Versus Spring Grain Companion Crops and Its Relation to Nitrogen Fertilization of the Winter Type 1
Author(s) -
Blackmon Clinton R.,
Snell Robert S.
Publication year - 1954
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/agronj1954.00021962004600110003x
Subject(s) - relation (database) , citation , agricultural experiment station , agronomy , agriculture , mathematics , sociology , library science , history , biology , computer science , archaeology , database
EEDING rates and spacings of small grains in relation s to grain and forage yields have been investigated in the Midwest and Southern Great Plains (1, 2, 4, 6, 7). Although the results have varied, close spacings generally have given better grain yields but less thrifty forage stands. Applications of nitrogen fertilizer have usually given significantly higher grain and straw yields (3, 5 ) . The present study was organized to determine the effect of 7-, alternate 7and 14-, and 14-inch spacings on winter grain and the associated red clover-timothy forage. Preliminary research during the 1949 and 1950 seasons had indicated a better grain yield at 7than at 14-inch spacings but better forage establishment at 14 inches. As originally outlined, the study sought to relate spacing to fertilizer practice, but due tu difficulty in establishing the desired levels of phosphorus and potassium within the period of the study, the relationship has been limited to nitrogen fertilization. To determine the effect of spacing on spring grains, oats were grown as a companion crop to alfalfa in 1951, 1952; and 1953. Thsame three spacings were used with the spring oats as with the winter wheat. Uniform applications of fertilizer were made.