6Opez M.V. L, Arrhe J.L. Growth, yield and water use efficiency of winter barley in response to conservation tillage in a semi-arid region of Spain[J]. Soil & Tillage Research,1997(44):35-54.
7Dama R.F, Mehdia B.B, Burgessb M.S.E, C.A. et al.Soil bulk density and crop yield under eleven consecutive years of corn with different tillage and residue practices in a sandy loam soil in central Canada[J].Soil & Tillage Research ,2005,84:41 - 53.
8Abbas Hemmat, Iraj Eskandari. Dry land winter wheat response to conservation tillage in a continuous cropping system in northwestern Iran[J]. Soil & Tillage Research. 2006, 86:99-109.
9S. Sarkar, M. Paramanick, S.B. Goswami.Soil temperature, water use and yield of yellow sarson (Brassica napus L. var. glw.wa) in relation to tillage intensity and mulch management under rainfed lowland ecosystem in eastern India[J]. Soil & Tillage Research, 2007(93): 94-101.
10Su Ziyou, Zhang Jinsong, Wu Wenliang. Effects of conservation tillage practices on winter wheat water-use efficiencyand crop yield on the loess plateau, China. Agriculture water management, 2007, 87:307-314.
