evaluating energy efficiency of site-specific tillage in maize in ne italy. | this paper examine the efficiency of energy use of three conservation tillage practices (sst - sub-soil tillage; mt - minimum tillage; and nt - no tillage) performed within two management zones, previously identified in a field according to the stability of yield variability. experiments were carried out in 2003 in ne italy, on a farm near rovigo, on a 8-ha field with clay soil, in maize (zea mays, l.). the purpose of the paper is (i) to investigate the energy variability due to these tillage pr ... | 2008 | 18304805 |