Аuthors: G. YULDASHEV, doctor of agricultural sciences, professor,
S. ZAKIROV, candidate of agricultural sciences, associate professor,
M. HOLDAROVA, applicant,
Ferghana State University (19 Usmanhodzhaeva Str., 712000, Ferghana, Uzbekistan)
Abstract: The article presents the results of a study on the impact of artificial barrier properties of sand and cotton plants. It was found, that a change in bulk density changes water permeability sands. An artificial barrier has had a positive impact on the moisture content of sand. For example, in the control the moisture content in the layer 30–40 cm is equal to 5.8 %, with the introduction of 400 t/hectare fine earth in the second option ― increased to 16.4 %. A further increase of the introduced fine earth to 1.000 t/hectare had a proportional impact on the moisture content of the soil. Studies have shown that mechanical composition and water- physical properties of the soil significantly influenced by consolidation, migration and the availability of nutrients. The introduction of fine earth increases in proportion to the nutrient application rates of earth. The greatest amount of nutrients noted in option with 1,000 t/hectare. The highest accumulation of nutrients honored at a depth of 30–50 cm, above and below this depth concentration of N-NO3 , P2 O5 , K2 O is much lower than in the horizon of 30–50 cm. Phenological observations over growth and development of cotton during the growing season in the experimental field showed that in the control cotton significantly lagged behind in growth and development. With the creation of an artificial screen variants with plowing of fine earth 40 cm cotton had the advantage in growth and development, it is much superior to the control variant. Creating of the artificial mechanical barrier in the sand had a positive effect on cotton yield. The crops in years of research and subsequently show the effectiveness of the tested reception in a reclaimed sands. As a result of researches it is established that creation of an artificial barrier on sand at a depth of 40 cm from a fine earth in norm of 400–1000 t/hectare increases productivity of a cotton relatively to control, beginning from 1.4 c/hectare to 9.1 c/hectare.
Keywords: sand, screen, water penetration, barkhan sand, productivity, phenology, barrier, planning.
