The main efforts of post-harvest tillage should be focused on:- depriving the vital forces of fragments of harvested crops;- creation of a favorable environment for the biotransformation of plant residues into organic matter; - control of fungal pathogens, insect pests and weeds; - preservation and accumulation of moisture;- creating conditions for a high-quality sowing campaign and the growing season of subsequent crops.Disk harrows (DB) are optimally suited for solving these tasks. DB is an agricultural equipment that performs special tillage - harrowing. It is considered the most efficient tillage unit.The DB design is based on the central and two side frames, as well as a trailer device connected to the central frame. The DB's working tools are discs that are attached to the side frames and have a modular (battery-powered) design. Each battery can include 10 or more discs. For classic DB's, they have one common shaft, while for DB's with rollers, the discs are mounted on individual racks. In this case, the discs are positioned at certain angles to the direction of movement (angle of attack) and the horizon line (angle of clipping).The functionality of the rear rollers consists in crushing the soil, compacting and leveling the surface, as well as keeping the harrow at the set working depth.An important element of the design of a disc harrow with rollers is the integrated strippers located between the discs and the rollers. Their task is to slow down the flow of soil ejected by the discs.The modern agricultural machinery market provides a huge selection of disc harrows from both domestic and foreign manufacturers. The distinguishing features of various DB models are:- type of aggregation;- shape and size of disks;- the type of mounting discs to the frame;- row-by-row;- working depth and width of the grip;- the type of location of the working modules, etc.According to the type of attachment to the tractor, there are mounted, semi-mounted and trailed DB with folding or solid frames.The discs of different models may differ in their shape (flat, hemispherical, conical), the cutting blade may be solid or have cutouts of different shapes (trapezoidal, crowned, sickle-shaped, etc.). In thickness, the discs can be standard (6 mm) and reinforced (9 mm), made of their usual, hardened or alloyed steel boron.The diameter of the discs also varies, depending on the depth of processing. For loosening to a depth of 60 mm, discs with a diameter of 450-490 mm are used, up to 120 mm - with a diameter of 500-590 mm, and up to 180-200 mm - with a diameter of more than 600 mm. According to these indicators, disc harrows are divided into light, medium and heavy.The depth of processing, the number of crop fragments, humidity and soil density determine the number of discs and the number of DB. They can be one-, two-, three-, and four-row.The width of the disc harrow, first of all, should correlate with the size of the cultivated areas. On plots of up to 1000 hectares. the harrow with a width of 5.2-8.2 m is considered the most effective, from 1000 to 1500 ha. - 8.2-10.2 m, and on larger areas wide-ranging folding DB (12-16 m) are needed.In addition to the usual multi-row DB with parallel rows of disk batteries, the working modules can be positioned at an angle to each other. Tandem (X-shaped) and offset (V-shaped) harrows serve as such examples.The operational requirements for DB are recommended:- strictly observe the speed limit;- do not allow U-turns in place with sunken discs;- do not operate the units on rocky soils. Many bookmakers claim to love cricket, but only a few offer hundreds of markets for associate nations like Nepal and UAE. A dedicated cricket fan receives a specialized list of platforms that provide player-specific lines for test matches, not just IPL. The true best cricket betting sites on our list, including Parimatch and MelBet, offer top batsman, top bowler, and highest opening partnership markets for every international game. Our rankings prioritize bookmakers with ball-by-ball live stats and local currency support for Indian rupees, Bangladeshi taka, and Pakistani rupees. You same respect as an Ashes series.
