Improving the patency of sprinkler machines on moistened soil on the basis of experimental and theoretical studies of the system “irrigation rate-soil-sprinkler machine”

Abstract

A feature of the work of wide-reach sprinkler machines is that the supporting surface when moving is moistened, and waterlogged soils in case of significant irrigation rates. At the same time, the wheeled running systems themselves are not well adapted to moving on waterlogged soils, water-saturated, low-bearing soils. The reliability of the sprinkler machines with an increase in irrigation rates is significantly reduced due to a decrease in their patency and forced downtime. The aim of the study was to increase the patency of sprinkler machines on moistened soil on the basis of experimental and theoretical studies of the system “irrigation rate – soil – sprinkler machine”. On the basis of the conducted studies, the regularities of track formation after the passage of wide-reach sprinkler machines of circular action were revealed. The model of interaction of the wheel with the soil is presented. The dependences of the depth and width of the track on the bearing capacity of the soil and the distance from the main support for sprinkler machines with rigid wheels of the “Fregat” type and pneumatic wheels of the “Kuban-LK1M” (KASCAD) sprinkler machine, “Kuban-LK1” MDEK 212 and “KASCAD” DM type are obtained. The conducted studies allowed to determine the optimal ratio of the pipeline diameter, span width and type of running systems, depending on the load-bearing capacity of the soil.

The influence of spatial heterogeneity of the properties of agricultural fields on productivity

“…Accordingly, the humidity is from 25% to 17%. The decrease in the yield of alfalfa green mass reaches 40 c/ha [13][14].…”

“…The simplified approach was primarily due to the lack of technical and technological capabilities, appropriate digital technologies, and sensor systems. Nevertheless, modern domestic and foreign researchers have proven the relatively low effectiveness of this approach [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Technical and technological Solutions for environmentally safe Irrigation with wide-reach Sprinklers

“…Studies of scientists [1][2][3][4][5][6][7][8][9][10] have established that the average intensity of rain at the beginning of the DM "Frigate" varies from 0.05 to 0.10 mm/min and reaches 0.45 mm/min at the end of the car when calm and increases to 0.6...0.8 mm/min with wind. The average actual rain intensity varies along the pipeline from 1.5 to 2.6 mm/min.…”

“…The average diameter of the droplets increases with distance from the fixed support from 0.2 to 2.8 mm [1][2][3][4][5][6][7]. Almost 70% of the irrigation norm is formed by drops of 0.8...2.0 mm.…”

“…They form a fine-drop rain with a small height of the rain cloud rise. The radius of capture by rain reaches 6-18 meters, with an average intensity of 0.3-0.8 mm/min [1][2][3][4].…”