Potassium and plant health
Perrenoud, S.
Potassium and plant health - 2nd rev. ed. - Bern 1990 - 365 p. - No. 3; Switzerland, I.P.I. Res .
631.811.3
Potassium and plant health - 2nd rev. ed. - Bern 1990 - 365 p. - No. 3; Switzerland, I.P.I. Res .
631.811.3