Some Bacteriological and Chemical Effects of Calcium and Magnesium Limestones on Certain Acid Iowa Soils. / The Effects of Liming on the Liberation of Potassium in Some Iowa Soils.
Häftad bok.
Nyskick. Ames (Iowa), 1936. (30) + (24) s. + tryckta omslag. Särtryck med egna titelsidor. (Research Bulletin, 196-7.) [A1554]