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Adjustment of sowing rate of corn/soybean precision seeder


The traditional sowing method of corn and soybean is hole sowing or drill sowing, which not only causes waste of seeds but also causes competition for water and fertilizer between seedlings after emergence, which affects yield. Mechanical precision on-demand technology can realize equidistant, single-grain on-demand, saving labor, time, cost, and robust seedling emergence. Here is an introduction to the use and adjustment technology of the corn/soybean precision planter.

The working status of the planter has a great impact on the quality of planting and has a direct impact on the increase in agricultural production and income. From the inspection and maintenance of the planter and the adjustment of the seeding rate, how to ensure the good working condition of the planter is described to ensure that the quality of the work is improved. Operational efficiency.

Seeding is one of the important links to crop cultivation. There are roughly the following sowing methods in my country: broadcast seeding, drill seeding, hole seeding, precision seeding, film seeding, and no-tillage seeding. The types of corn/soybean precision seeders are divided into spreaders, drill seeders, hole seeders, precision seeders, film seeders, no-till seeders, etc. according to different seeding methods. The quality of sowing has a direct impact on the increase in agricultural production and income, and the planter has a direct effect on the quality of sowing. If the technical status of the planter does not meet the requirements, it will reduce the quality of seeding, increase energy consumption, and affect agricultural benefits. Therefore, we must check and adjust the planter correctly to keep it in a good technical state. This is an indispensable work to ensure the quality of the work and improve the efficiency of the work.

Adjustment of sowing rate of corn/soybean precision seeder

1. Adjustment of seeding volume. At present, grain planters mostly use outer groove wheel type metering devices, and there are two ways to adjust the seeding amount. One is to change the working length of the metering wheel, and the other is to change the transmission ratio. The two methods are used together when adjusting. In order to ensure the uniformity of the sowing volume of each row, the working length of each groove wheel must be adjusted uniformly. Adjustment method: Turn the indicator plate to the 0 positions, and the end face of the blocking wheel is in contact with the grooved wheel retaining ring. Check the blocking wheel one by one. For the seed metering device that is not in contact, loosen the nuts of the clamps at both ends a little bit. Knock the blocking wheel inward, adjust it to contact and then tighten it.

2. Test calibration of the amount of corn/soybean precision planter. After selecting the transmission ratio, the working length of the sheave wheel, and the opening of the valve, the amount of seeding is only approximate, and an accurate value can be obtained after testing and correction.

3. Field sowing rate correction. When sowing, the seeding rate must be retested and corrected in the field. Method: Put seeds with a depth of 8-10 cm in the seedbox first, flatten the surface, and draw horizontal lines on the contact between the seed layer and the four walls of the seedbox with chalk. Calculate the number of seeds that should be sown according to the planned number of acres. Weigh all the seeds that should be sown and add them to the seedbox before sowing. After sowing the predetermined number of acres, stop the machine and scrape the remaining seeds in the seedbox. If the seed surface is higher than the horizontal line at this time, it indicates that the seeding rate is insufficient. On the contrary, it indicates that the amount of sowing is too much, and the working length of the sheave must be re-adjusted and retested until it meets the requirements.

4. Adjust the position of the seeding tongue. For the lower row type outer groove wheel seed meter, the adjustment of the seeding tongue position is determined according to the size of the seed particles sowed. When adjusting, the split pin is inserted into the selected one of the 3 small holes on the wall of the seeding box. In the hole, 3 small holes correspond to 3 different openings, and the top hole has the smallest opening, which is suitable for sowing small seeds, such as millet and rapeseed. The middle hole is suitable for sowing medium-grain seeds, such as wheat and sorghum. The bottom hole has the largest opening and is suitable for sowing large seeds such as soybeans and corn.


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