Plant and Soil · 1981 · 112 citations · 20 references
AgricultureAgronomySoil SciencesMicronutrient NutritionNutrient ManagementSoil FertilityCopper NutritionCrop NutritionIron NutritionManganese NutritionPhosphorus NutritionSoil-plant Nutrient RelationsFoliar Phosphorus NutritionManganese AvailabilityZinc Availability
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L J Hardin · Journal of AOAC INTERNATIONAL · 1958 · 6K citations · Full text
R. L. Flannery · American Journal of Potato Research · 1972 · 1.1K citations