AN INDEX OF COMPETITION FOR ESTIMATING CROP LOSS DUE TO WEEDS
- 1 November 1972
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Plant Science
- Vol. 52 (6) , 921-927
- https://doi.org/10.4141/cjps72-159
Abstract
An "index of competition" is derived that can be used to estimate crop loss due to weeds when weed and crop species, density of weed stand, and expected weed-free yield are known. Experimental data are used to derive this index for wild oats (Avena fatua L.) in barley, wheat, and flax, respectively. Loss in grams per square meter equals ab1x, where a equals expected weed-free yield (g/m2), x equals number of weeds per square meter, and b1 equals "index of competition." This index is 0.0230, 0.0339, and 0.0601 for wild oats in barley, wheat, and flax, respectively.Keywords
This publication has 5 references indexed in Scilit:
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- Competition of Wild Oat in Wheat and BarleyWeed Science, 1968
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- ECONOMIC LOSSES CAUSED BY WEED COMPETITION IN MANITOBA GRAIN FIELDS. I. WEED SPECIES, THEIR RELATIVE ABUNDANCE AND THEIR EFFECT ON CROP YIELDSCanadian Journal of Plant Science, 1960
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