Abstract
Cotton and wheat seeds were soaked in various salt solutions (including ammonium phosphates). The seeds were then allowed to germinate. With increasing salt concentration, the germination of cotton did not decrease, whereas the germination of wheat decreased in most cases. Soaking cotton seeds in 0.25m (NH4)2SO4 solutions adjusted to pH levels between 7.2 and 9.0 showed germination injury above pH 7.8. The harmful effect of diammonium phosphate treatment was largely alleviated by subsequent soaking of seeds in dilute solutions of MgSO4. Germination injury from (NH4)2HPO4 appeared to be largely due to the inactivation of Mg in seeds.
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