CORN HYBRID SELECTION AND CLIMATIC VARIABILITY: GAMBLING WITH NATURE?

Autor:	Robert Blain, Philip D. Keddie, Barry Smit
Rok vydání:	1997
Předmět:	Range (biology) business.industry Geography Planning and Development food and beverages Growing season Climatic variability respiratory tract diseases Biotechnology Geography Agronomy Heating energy business Selection (genetic algorithm) Earth-Surface Processes Hybrid
Zdroj:	The Canadian Geographer/Le Géographe canadien. 41:429-438
ISSN:	1541-0064 0008-3658
DOI:	10.1111/j.1541-0064.1997.tb01325.x
Popis:	Farmer adaptation to climatic variability is explored via an analysis of corn hybrid selection in southern Ontario. Corn hybrid varieties are available for a wide range of conditions, including accumulated heat, measured as Corn Heat Units (CHUS). Hybrids with higher CHU ratings generally have higher yields, so long as there is sufficient heat for them to mature. Farmers choose their hybrid varieties prior to the growing season, in the face of uncertainty about the CHUS that will accumulate at their location. Farmers in the sample counties showed a consistent tendency to adjust their hybrid selection on the basis of the previous year's growing conditions. After the high CHU year of 1991, farmers chose significantly more longer-maturing and potentially higher-yielding, but riskier varieties. After the lower CHU years of 1992 and 1993, farmers' hybrid selections became markedly more conservative.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc0bb51901db5b83bb35306be4a62d7f https://doi.org/10.1111/j.1541-0064.1997.tb01325.x Zobrazit plný text záznamu Plný text