Dollhopf, D. J.2015-05-122015-05-121971https://scholarworks.montana.edu/handle/1/5057enSoilsChemistryGypsumIrrigationPhysicsSaltsThe effects of gypsum rates and irrigation regimes on soil physical and chemical properties of a saline-alkali soilThesisCopyright 1971 by Douglas John Dollhopf