@ARTICLE {LAL:1978g, title = {Effects of no-tillage and ploughing on efficiency of water use in maize and cowpea}, author = {Lal, R. and Maurya, P. R. and Osei-Yeboah, S. }, journal = {Experimental Agriculture}, year = {1978}, volume = {14}, pages = {113--120}, issn = {0014-4797}, }