Abstract:
Stochastic distribution of precipitation in the area of reference and their insufficient revaluation on sloping lands make
that the water is not provided to the physiological requirements of crop plants, irrigation being necessary even in some
rainy years. The analysis of soil humidity in the period 2007-2011, allowed the adjustment of irrigation system
components in a manner that will produce economically efficient crops, while maintaining the control of erosion
process.
There were differences in the vertical variation of soil moisture content of different land use types, and the greatest
variation of soil moisture content distribution was in 0-40 cm range of soil layer, it was a common feature of the profile
distribution of soil moisture that amplitude of variation of soil moisture becomes smaller with the increase of soil layer
depth.
Soil humidity deficit control in the phenophase of maize panic appearance - grain development, and in stages of 6-8
leaves and milk ripening, by distributing relatively low volumes of water (60 mm), determines the average production
increases of 1400 kg / ha, with variations between 900-1700 kg / ha, producing a water stress between this stages, not
influencing visibly the crops.
