|Author:||Edwards, J. T. ; Purcell, L. C. ; Vories, E. D. ; Shannon, J. G. ; Ashlock, L. O.|
|Book Group Author:||NA|
The midsouthern USA often experiences a drought from mid-June through late-August. Short-season soyabean (Glycine max) cultivars of different maturity groups (MG 00, 0, I, II, III and IV) were evaluated in narrow rows and at high populations for their ability to avoid drought at several locations in the mid-South in 1999, 2000 and 2001. When planted in early May under nonirrigated conditions, MG 00 and 0 cultivars generally had lower yields than later-maturing cultivars. Within an irrigation treatment, cultivars from MG I, II, III and IV generally produced similar yields under irrigated or nonirrigated conditions, but MG I and II cultivars required considerably less irrigation than cultivars from MG III and IV. April and early-May planting dates required less irrigation and generally yielded more than late-May or June planting dates for all MG and locations. This research demonstrates that yield potential in the mid-South is similar for cultivars from MG I, II, III and IV under favourable conditions, that irrigation needs can be decreased by use of early-maturing cultivars planted in April or early May and that risk of exposure to drought can be decreased by including MG I and II cultivars in a nonirrigated, early production system.
|Pages:||0 - 7|
crop yield, cultivars, drought, drought resistance,irrigation, maturity groups, plant water relations, planting date,soyabeans, USA, Glycine (Fabaceae), Glycine max, Papilionoideae,Fabaceae, Fabales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, Glycine (Fabaceae), North America, America, DevelopedCountries, OECD Countries, cultivated varieties, drought tolerance,soybeans, United States of America, watering, Field Crops (FF005) (NewMarch 2000), Plant Breeding and Genetics (FF020), Plant Water Relations(FF062), Plant Production (FF100), Environmental Tolerance of Plants(FF900), Soil Water Management (Irrigation and Drainage) (JJ800)(Revised June 2002) [formerly Soil Water Management]