APPLICATION OF COMPREHENSIVE MEASURES TO COMBAT EROSION USING IRRIGATION FOR MARKET ECONOMY IN AZERBAIJAN
Keywords:soil structure, moisture, surface slope, plowing, aggregate composition, irrigation erosion
Studies showed the productivity increases with improved the soil structured. Research explained the fact that in soils with 0.25 mm diameter water-resistant aggregates of 14%, grain yield is 22.2 cents/ha, while water-resistant aggregates are 8%. In soils, it’s decreased to 18.4 cents/ha (3.8 cents/ha), which also known that alfalfa plays a key role in improving the water-physical properties of the soil, as well as its agrochemical composition. The paper indicates the amount of water-resistant aggregates under the clover is much greater than in the cotton fields, if this seen from the comparison. Therefore, the amount of water-resistant aggregates in 0-10 cm (4.0-18.5) of soil in the cotton field, while 0.5 cm (6.5-11.2) and 20-30 cm (4.5-18.2) is in clover crops with the indicator of 35.0 is increased to 24.7 and 27.0. Plus, this revealed the accumulation of more organic and mineral substances under alfalfa cultivation occurred. The analysis of soil samples taken from the one-year and two-year plots, and resulted with 1.66% humus and 0.112% total nitrogen were accumulated in the topsoil of the annual alfalfa field. Meanwhile, the amount of humus accumulated in the topsoil in the biennial clover field was 1.70% and the total nitrogen content was 0.150%. This might be noted that the development of irrigation erosion in irrigated arable lands depends on the fact that the surface of the area is covered with a large cover. This was clearly shown by the observations and was found by both relatively weak (0.4 mm/min) and very (1.4 mm/min) heavy rains protect clover soil from further wash out. So, 0.4 mm/min in heavy rains, the depth of the furrow under alfalfa is 14.4 mm, 31 mm at 1.4 mm/min, 50.9 and 64.2 mm between rows of cotton, respectively, and 78.6 and 113 mm along the row 6 mm.
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