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Changes in Breaking Strength of Straw of Wheat Varieties from Heading to Maturity 1
Author(s) -
Bartel A. T.
Publication year - 1937
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/agronj1937.00021962002900020007x
Subject(s) - heading (navigation) , agricultural science , division (mathematics) , maturity (psychological) , straw , citation , agriculture , business , political science , agronomy , biology , library science , mathematics , computer science , arithmetic , engineering , law , ecology , aerospace engineering
R to lodging merits consideration in any program of improving small grains. Several workers in recent years have studied the relation between resistance to lodging in wheat varieties and the breaking strength of the straw. These measurements were made on plants harvested at or near maturity without determining whether the comparative breaking strength was the same as at earlier stages when lodging usually occurs. The present investigations of the breaking strength of straw at intervals from preheading to maturity were undertaken in an attempt to answer this question, and to ascertain the strength of straw in wheat plants harvested or dried prematurely as under drouth conditions. Salmon (4) ~ has described an apparatus for determining the breaking strength of straw. He found a relationship between lodging and breaking strength in winter wheat varieties. A similar relationship was reported by Salmon and Laude (5). Davis and Stanton (2), ing the same type of apparatus, made determinations on a large number of oat varieties at Aberdeen, Idaho. In general, the stiffer-strawed varieties, as determined by field observations, showed the highest resistance to breaking. Clark and Wilson (x) described a straw-breaking machine and tested numerous varieties of wheat and barley. They found no significant correlation between breaking strength of straw and lodging. Helmick (3) obtained differences in straw strength between two varieties of winter wheat by using an apparatus he devised. METHODS