Browsing by Author "Pettinger, N. A."
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- How Soil Reaction Affects the Supply of Plant FoodsPettinger, N. A.; Shear, George M. (Virginia Polytechnic Institute, Extension Service, 1947-03)This publication summarizes the effect of acidity and alkalinity on the availability of plant foods and the relation between lime and fertilizers. It features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.
- How Soil Reaction Affects the Supply of Plant NutrientsPettinger, N. A. (V.P.I. Agricultural Extension Service, 1960-05)This publication summarizes the effect of acidity and alkalinity on the availability of plant foods and the relation between lime and fertilizers. It features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.
- A Useful Chart for Teaching the Relation of Soil Reaction to the Availability of Plant Nutrients to CropsPettinger, N. A. (Virginia Agricultural Experiment Station, 1935-03)This publication features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.
- A Useful Chart for Teaching the Relation of Soil Reaction to the Availability of Plant Nutrients to CropsPettinger, N. A. (Virginia Agricultural and Mechanical College and Polytechnic Institute, Extension Division, 1935-03)This publication summarizes the effect of acidity and alkalinity on the availability of plant foods and the relation between lime and fertilizers. It features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.