Evaluation of the controlled hydrological-meliorative state in the irrigated soils of the Shirvan plain in Azerbaijan

A direct impact of the hydrogeological-meliorative condition elements that can be quickly changed, subsoil waters level and productivity was analyzed in the article. Management of subsoil waters in the Shirvan plain, development, projecting of the irrigated farming in agriculture, fulfilment, restoration of the work assumes a great importance in agriculture and irrigation systems exploitation. Currently, 1.309 km of inter-farm and 7449 km of intra-farm drains are used, the share of which is 50.1 m/ha. Experience and calculations have also shown that the replacement of pipelines, concrete troughs and channels of existing earthen canals gives 20-30% savings in irrigation water, largely prevents the rise of the groundwater level and the deterioration of irrigated lands.