ROTARY TINE OF AGRICULTURAL TRACTOR CAPABLE OF OPTIMIZING MOISTURE OF CULTIVATED SOIL

摘要

PURPOSE:To purposefully deform the shape of a plow sole, guide water in the lower layer of cultivated soil in a constant direction, improve water draining and facilitate succeeding work or crop cultivation, by tilting or curving a line connecting tips of rotary tines consisting of at least one group of an agricultural tractor relatively to the tine shaft. CONSTITUTION:Rotary tines of an agricultural tractor are placed so that, e.g. a tine 4 having the shortest tine radius is arranged on the side of a chain case 3 of a tine shaft 2 and tines 6 having a gradually longer tine radius are subsequently arranged in the direction of a tine shaft receiver 5. Thereby a line 1 connecting the tine tips is tilted or curved relatively to the tine shaft 2 to constitute the rotary tines. Tillage is then carried out with the rotary tines to level the surface 8 of cultivated soil with a land grading plate 7 and the plow sole 9 is formed into an inclined surface from the side of the chain case 3 to the side of tine shaft receiver 5. As a result, water draining property of cultivated soil is ensured even in the autumn season with a large amount of precipitation and cultivation of even winter crops,such as barely or wheat, is carried out with stabilized crop situation.