(Ndlitelxnye stacionarnye opyty w re{enii problemy powy{eniq plodorodiq po~w i produktiwnosti zemledeliqs - (N{elganow(B,(Ni(B. (Ni(B.s; (Ndomanow(B,(Nn(B. (Nm(B.s; (Nsolowi~enko(B,(Nw(B. (Nd(B.s; (Npotrqsaew(B,(Na(B. (Na(B.s (2009)
Keywords: (Ngruntis; (Npolewye opytys; (Nsewooborots