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Cultivators stir and pulverize the soil, either before planting (to aerate the soil and prepare a smooth, loose seedbed) or after the crop has begun growing (to kill weeds—controlled disturbance of the topsoil close to the crop plants kills the surrounding weeds by uprooting them, burying their leaves to disrupt their photosynthesis or a ...
Soil loses nutrients, like nitrogen and fertilizer, and its ability to store water. [17] [note 2] Decreases the water infiltration rate of soil. (Results in more runoff and erosion [17] [19] as the soil absorbs water more slowly than before) [note 3] Tilling the soil results in dislodging the cohesiveness of the soil particles, thereby inducing ...
Harrows differ from cultivators in that they disturb the whole surface of the soil, while a cultivator instead disturbs only narrow tracks between the crop rows to kill weeds. There are four general types of harrows: disc harrows , tine harrows (including spring-tooth harrows , drag harrows , and spike harrows), chain harrows, and chain-disk ...
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It uses many flexible iron teeth mounted in rows to loosen the soil before planting. A drag harrow more specifically refers to a largely outdated type of soil cultivation implement that is used to smooth the ground as well as loosen it after it has been plowed and packed. It uses many flexible iron teeth usually arranged into rows. It is set on ...
For example, in mechanical weed control, controlling cultivator tooth depth is practical only with a decently flat soil contour, and in combining, controlling combine head height is practical only with a decently flat soil contour. Rolling is also believed to help reduce moisture loss from cultivated soil.