(NpO^WY ~ERNOWICKOJ OBLASTI I OPREDELENIE POTREBNOSTI IH W UDOBRENIQH (B:s (NMETOD(B. (NPOSOBIE DLQ AGRONOM(B. (NLAB(B. (NAGRONOM(B. (NPERSONALA KOLHOZOW I U^ITELEJ(B-(NHIMIKOW SRED(B. (N[KOL (B/s - (NkU^INSKIJ(B, (Np(B.(Na(B.s; (NqNEWSKAQ(B, (Nl(B. (Np(B.s ((NlXWOW (B:s (NkAMENQR(B,s, 1965)