Feibert, E. B. G., Shock, C. C., & Saunders, L. D. (2001). Evaluation of humic acid and other non-conventional fertilizer additives for onion production. OSU Agricultural Experiment Station - Special Report 1029. pp. 41-51.
Feibert, E. B. G., Shock, C. C., & Saunders, L. D. (2001). Evaluation of humic acid and other non-conventional fertilizer additives for onion production. OSU Agricultural Experiment Station - Special Report 1029. pp. 41-51.