AN INDEX OF COMPETITION FOR ESTIMATING CROP LOSS DUE TO WEEDS

Autor:	D. A. Dew
Rok vydání:	1972
Předmět:	Index (economics) biology media_common.quotation_subject Plant Science Horticulture biology.organism_classification Crop species Competition (biology) Square meter Agronomy Yield (wine) Crop loss Avena fatua Weed Agronomy and Crop Science Mathematics media_common
Zdroj:	Canadian Journal of Plant Science. 52:921-927
ISSN:	1918-1833 0008-4220
DOI:	10.4141/cjps72-159
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::383db0954879bdbb8871ce2e46a14ddb https://doi.org/10.4141/cjps72-159 Zobrazit plný text záznamu