Tunisian agriculture is subject to an arid to semi-arid climate. Water erosion has caused losses of soils and deterioration of soil quality. Mechanization has also worsened the situation. Soil conservation has become a major objective of national development plans and important funds have been used to sustain natural resources. Direct drilling (sowing) technique is being applied as an alternative to conventional sowing mainly in marginal lands. Literature shows direct drilling saves between 24 and 26.