Studies on nitrogen, phosphorus and potassium fertilization of violet, viola odo
Shoushan, Abdel-Alim M., Kabeel, M.T.
Studies on nitrogen, phosphorus and potassium fertilization of violet, viola odo - Cairo 1956 - 18 p. & 1 pl. - No. 92; Cairo University, Facu .
Studies on nitrogen, phosphorus and potassium fertilization of violet, viola odo - Cairo 1956 - 18 p. & 1 pl. - No. 92; Cairo University, Facu .