Studies and researches concerning possibility of increasing precision at sowing machines in nests
2020
Saracin, I., University of Craiova (Romania) | Glodeanu, M., University of Craiova (Romania) | Vasile, C., University of Craiova (Romania) | Negulescu, V., University of Craiova (Romania) | Pandia, O., University of Agronomic Sciences and Veterinary Medicine of Bucharest (Romania)
Precision sowing importance, as a factor influencing the development of crops determined the specialists in the field to do sustained research to find ways to mechanize the sowing work with high precision, to ensure the number of plants per unit area, respectively, the necessary space for plant development. Increased precision of agricultural sowing machines has direct implications on the germination, emergence and development of plants. The paper presents researches on precision sowing machines, equipped with pneumatic distributors, these being the most used models, manufactured by foreign and Romanian companies. The purpose of the experimental research was: determining the influence of certain physical characteristics, as the seed form, MMB on sowing accuracy; establishing the way in which these characteristics influence the free fall speed of the seeds from the distribution apparatus to the ground, taking into consideration the possibility of increasing this parameter, in order to reduce the travel times of the distance to the ground; determining the floating speed of seeds from several crops, this being an important parameter, which influences the design and adjustments of the sowing machines. The laboratory tests were performed on a stand with fixed sowing body. The seed distribution disk was driven with rotational speeds, corresponding to the working conditions, without slipping. Within the experimental laboratory researches, measurements were made in order to determine the uniformity of distribution of seeds on the row. Following the tests performed, it was found that the values of this parameter falls within the requirements imposed for sowing hoeing plants. The experimental results allow the elaboration of useful recommendations for farmers using this technical equipment.
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