Plant availability of added phosphorus in different Iowa soils /
by Oetit Koswara and John J. Hanway.

APA Citation

Koswara, O., Hanway, J. J. (1969). Plant availability of added phosphorus in different Iowa soils. Ames, Iowa: Iowa Agriculture and Home Economics Experiment Station, Iowa State University of Science and Technology.

MLA Citation

Koswara, Oetit, and John J Hanway. Plant Availability of Added Phosphorus In Different Iowa Soils. Ames, Iowa: Iowa Agriculture and Home Economics Experiment Station, Iowa State University of Science and Technology, 1969.