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Filtering by: Advisor Powers, W. L. Decade 1920-1929 Rights Statement No Copyright - United States

Improvement in percolation of water thru soils having a high clay content and restrict...

The relation of calcium ion requirement of alfalfa to the calcium content of the soil

Removal of plant nutrients in percolate from lysimeter tanks

The crop producing power of limited quantities of essential plant nutrient

Studies of economic rates, forms, and combinations of use of sulfur as a fertilizer