Optimal fertility indices of ordinary chernozem for maize and improvement of its cultivation technology in crop rotations of the Zavolzhye forest-steppe
Tsirulev, Anatoliy Pavlovich, 1995, Candidate of Sciences dissertation
Optimal fertility indices of ordinary chernozem for maize and improvement of its cultivation technology in crop rotations of the Zavolzhye forest-steppe — Tsirulev, Anatoliy Pavlovich — 1995 — Russian Dissertation Library