COTTON PLANT OF MUGHAN – SALYAN ECONOMIC DISTRICT ANCIENT WATERED TUND USED UNDERNEATHEFFECT OF EROSION PROCESS ON AGROCHEMICAL INDICATORS AND STRUCTURE-AGGREGATE COMPOSITION OF GRAY-GRASS SOILS

Abstract

The changes happening in the structural-aggregate composition and agrochemical indications of soil on separate genetic layers of the dark gray-meadow soils profile have been determined on the basis of the field-soil and cameral-laboratory materials performed in the experimental area of the zone of state Sort-Test Station in the part of the Salyan district in the structure of Mughan-Salyan economic region. The agrochemical indications and structural-aggregate composition in the experimental area were studied as a result of the analysis of the soil samples taken from genetic layers of the section with structural-aggregate composition and agrochemical indices in the experimental area. An amount of the dry and wet atructural-aggregate particles larger than 0.25 mm, and also humus, nitrogen phosphorus which are basic-fertility indices on genetic layers of Dark-grey-meadow soils was investigated. A result of the laboratory analyzes rendered that the humus quantity on the upper layer of the section was 3.6% and it gradually decreases towards the lower layers. It is 1.8%. An amount of total nitrogen gradually decreases towards lower layers and changes by 0.113-0.225%. The highest index (0.225%) is at the first layer, the lowest indication (0.113%) is in the last layer. A sum of dry structural particles more than 0.25 mm is 97.9-98.75%, but a sum of the wet structural particles changes by 75.00-81.68%. A sum of the dry structural oarticles more than 0.25 mm doesn`t differ in the separate genetic layers of profile, the lowest index (97.49%) was observed at the first layer, the highest index (98.75%) at the second layer, but in the wet structural particles the lowest index is (75.00%) at the last layer, the highest index (81.18) is at the first layer.