Research Notes : United States : Evaluation of soybean germplasm for stress tolerance and biological efficiency : To evaluate soybean germplasm and cultivars for stress tolerance toward - Soil Acidity

Field experiments conducted on a silt loam soil with six culti-vars under four pH ranges (5.9-6.7, 5.7-6.5, 5.3-6.0 and 5.0-5.6) in-dicated significant tolerance of \u27Bedford\u27 and \u27Forrest\u27 under acid soil pH ranges. The two cultivars were superior to \u27Bragg\u27, \u27Braxton\u27, \u27Co-237\u27, and \u27Tracy M\u27 in 1981 and 1982 trials. However, lowering of pH to 4.6-5.4, 4.5-5.4, 4.1-5.1, and 3.8-4.5 resulted in nullified seed formation in all the cultivars