Research was conducted during 2009–2011 at the Lithuanian University of Agriculture (since 2011 Aleksandras Stulginskis University), Experimental Station. The soil of the experimental field was Calc(ar)i-Epihypogleyic Luvisol LVg-p-w-cc (Buivydaitė ir kt., 2001; IUSS Working Group WRB, 2007) with a texture of silty light loam on heavy loam. Experimental object – different species of living mulch plants and maize monocrop. One-factor, stationary field experiment was conducted. Different living mulches inter-seeded in maize inter-rows were tested.