[Wang, L. H.] Baicheng Normal Univ, Coll Tourism & Geog Sci, Baicheng 137000, Jilin, Peoples R China.
[Guan, J. N.] Shenyang Agr Univ, Rice Res Inst, Shenyang, Peoples R China.
[Wei, J.; Wei, J] Jilin Agr Univ, Sch Agr, Jilin, Peoples R China.
[Rasheed, A.] Hunan Agr Univ, Coll Agron, Changsha 410128, Peoples R China.
[Mahmood, A.] Univ Agr Faisalabad, Dept Agron, Faisalabad, Pakistan.