TY  - PRO
AU  - Yushenko,N.
AU  - Baitassov,A.
AU  - Iskakov,Z.
AU  - Karabayev,M.
AU  - Shpigun,S.
AU  - Yushenko,D.
TI  - Perennial grasses cropping system  and its ecological aspects in the drylands management of  Central Kazakhstan
PY  - 2009///
ER  -