The article presents the analytical materials on irrigated soils in serozem belt within the Andijan region, their morphogenetic properties have been studied and the diagnostic features of soils in eastern part of the Fergana Valley have been presented.

On the base of soil investigations of South-East of Kazakhstan area, soil data base was created. Structure and characteristic of soil data base was shown.

Influence of different of green manures, alfalfa growth and the short rotation on the dynamics of common and labile humus, mobile nutrition elements and agrophysical capacities of light chestnut soil of piedmont zone of plains Zailiskii Alatau are studied.

The work deals with the results of Rhizobium genus national strain search from leguminous plants, cultivated on soil samples, taken on southern and usual chernozems of Northern Kazakhstan and with general enzyme and biogenic activity as well.

Research works were carried out on southern chernozems, ploughed with minimal, zero and traditional technologies of soil tillage. The prime advantage of resource-saving technologies is yielding ability equalization of cereals on rotation fields as a consequence of effective moisture accumulation, restoring of soil fertility, reduction of humus mineralization rate and rise of farming standards.

It was determined, that insertion of manure in to the fallow field is an effective way of soil fertility and winter wheat yield increasing on the serozem and lightchestnut soils of South East Kazakhstan.

The indication of human impacts on environmental components, based on the comparison of the correlation of concentration of micro elements in the landscapes in relation to the clarks and soils in relation to the background regional (local) geochemical characteristics based on the example of Bishkek city have been considered.

Applying phosphorous fertilizer improves phosphate regime of the soil. Nitrogen, potash, and organic fertilizers, made in conjunction with phosphorus, also contribute to the content of the movable phosphorus in the soil, which in turn affects the increase crop yields and maintaining soil fertility.

In given article experimental data on influence of potash fertilizers on a food mode of irrigated light grey soils, dark-chestnut both rice-marsh soils are presented and productivity of a clap-raw, tubers of a potato and grain of fig. Efficiency of various doses of potash fertilizers is shown in all studied soils depending on their security exchange potash.

In article results of researches on working out короткоротационных schemes of hlopkovo-ljutsemovo-grain crop rotations on the maintenance and dynamics усвояемых nitrogen forms in soil with reference to features of a soil-climatic zone of the south of Kazakhstan are resulted

Based on the results (1999-2001yy.) studies on saline soils under paddy cultivation of rice in the application of different doses of nitrogen fertilizers and the types of flooding has been established that the soil is composed different nitrogen conditions, providing different levels of mineral nutrition of rice plants. The optimal nutrition of rice achieved fertilization N₁₂₀ and N₆₀+N₆₀ against P₉₀.

Soil protective measures for the irrigated eroded piedmont dark-chestnut soils have been worked out in the conditions of vegetable rotation based on the researches devoted to the peculiarities of soil cover, relief, nature of irrigation erosion displaying. Theoretical calculations for the choice of optimal elements on soil protective technologies of irrigation including the irrigations with allowable (according to the conditions of soil unbreaking) rates and water discharge in irrigation furrows.