Abstract
AbstractA need exists for information on effects of altitude on yield and other characteristics of soybeans (Glycine max (L.) Merr.). Accordingly we evaluated the response of several imported varieties and a local variety for 2 years at altitudes of 1,394 and 1,636 m.Soybean growth and development was retarded at the higher altitude, and plants were shorter, lodged less, and had fewer nodes. Seeds with better quality were produced at the higher altitude. Seed weight varied with years at the two altitudes. Yield of most varieties was lower at the higher altitude. Seed yield differences among varieties were not consistent between years.The higher altitude prolonged the intervals from planting to first flowering 3 to 13 days, and planting to maturity 2 to 24 days. Dates of first flowering and maturity of groups V through VII soybeans were delayed more than those of earlier maturing groups.
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