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The Response of Quack Grass to Variations in Height of Cutting and Rates of Application of Nitrogen 1
Author(s) -
Johnson A. A.,
Dexter S. T.
Publication year - 1939
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/agronj1939.00021962003100010009x
Subject(s) - citation , section (typography) , library science , computer science , mathematics , operating system
Q grass, Agropyron repens (L) Beauv., occupies large land acreages in Michigan and other northern states and has become a plant of considerable importance. The plant has a tenacious rhizomatic habit of growth and is difficult to eradicate. Several methods of quack grass control are practiced nearly all of which involve the exhaustion of root reserves and removal of photosyn-. thetic tissue. The following paper reports a study of defoliation o~ quack grass cultures, some high and some low in nitrogen. These were defoliated at various heights for a considerable period o~ time and the various effects on roots and rhizomes and new top growth were observed.