DONNAN EMF MEASUREMENTS IN SUSPENSIONS
MEASUREMENT AND CONTROL OF WATER POTENTIAL IN A SOIL-PLANT SYSTEM
LONG-TERM EFFECTS OF PHOSPHORUS, SULFUR, AND MOLYBDENUM ON A SUBTERRANEAN CLOVER PASTURE
EFFECTS OF 6 N HCl HYDROLYSIS ON THE ANALYTICAL CHARACTERISTICS AND CHEMICAL STRUCTURE OF HUMIC ACIDS
FRACTIONATION OF SOIL HUMATE WITH PHENOLIC SOLVENTS AND PURIFICATION OF THE NITROGEN-RICH PORTION WITH POLYVINYLPYRROLIDONE
THE RELATIONSHIP BETWEEN SOIL pH, ORGANIC MATTER, AVAILABLE PHOSPHORUS, EXCHANGEABLE POTASSIUM, CALCIUM, MAGNESIUM, AND NINE ELEMENTS IN THE MAIZE TISSUE
SOME FACTORS AFFECTING THE DETERMINATION OF ANTIBIOTICS IN SOIL
LABILE POOL AND PLANT UPTAKE OF MICRONUTRIENTS
SODIUM RELATIONS IN DESERT PLANTS
Methods for Research on the Ecology of Soil-Borne Plant Pathogens
Recent Advances in Plant Nutrition
The Chemistry and Biochemistry of Nitrogen Fixation
Conserving American Resources
Erosion and Sediment Pollution Control
Micronutrients in Agriculture
Soil and Crop Productivity
Role of Fertilization in the Intensification of Agricultural Production
Advanced Soil Physics
Origin of Sedimentary Rocks