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The argumentation of constructive and technological parameters of seeder ploughshare for the cereal crops

Author: Gadibadi Mihail
Degree:doctor of engineering
Speciality: 05.20.01 - Agricultural Engineering
Scientific adviser: Vladimir Serbin
doctor habilitat, professor, Agrarian State University of Moldova
Institution: Agrarian State University of Moldova


The thesis was presented on the 19 December, 2013
Approved by NCAA on the 13 February, 2014


Adobe PDF document0.67 Mb / in romanian


ploughshare gutter, sowing, technological process, technological parameter, seeder, seeding machine, resistance, dependence


The thesis is composed of introduction; four chapters; general conclusions and recommendations; bibliography from 123 titles; 11 annexes; 120 pages of essential text; 82 figures and 22 tables. The obtained results are published in 12 scientific works.

The work goal: the theoretical argumentation of the technological – mechanical processes and elaboration on the basis of these an effective methods of cereal crops seeding.

The work task: The information synthesis concerning the methods and technical means for unfolding the sowing of the cereal crops, their classification as well as their functional capacity evaluation in the limits of agrotechnical requirements imposed to the machines seeding cereal crops.

The elaboration of the theoretical bases of the functioning process of work organs for incorporating in the soil of the seeds of cereal crops. The elaboration of the theory of gutters formation by the ploughshare in working conditions at increased speeds. The studying of exploiting characteristics of incorporating organs of the cereal crops seed. The elaboration on the bases of research results of the experimental samples and effectuation of laboratory and field trials with evaluation of agrotechnical and energetical indexes. The elaboration and determination of economical efficiency of studied ploughshares for cereal crop sowing. The argumentation on the basis of obtained results, the necessity of modernization the technological process of cereal crops sowing.

Scientific novelty: they were elaborated the theoretical bases of cereal crops sowing at increased working speeds. It was motivated the form and parameters of the seeds incorporating organs in the soil. In the basis of laboratory and field researches they were obtained analytics and experimental dependences that offer the possibility of optimization technological and constructive parameters of organs for incorporating in the soil of cereal crops seeds.

Scientific problem solved: was justified and demonstrated the possibility of qualitative sowing a cereal crops at increased working speeds, in the framework of production technologies with low power consumption.

The theoretical significance and applicative value of the work consists in elaborating of the theoretical bases of sowing new working organs that provide the implementation in agriculture of energoeconomical technologies.

The obtained results are on the basis of a tried experimental model on the fields of Experimental Didactic Stations “Petricani” and implemented in production within SRL “Vadalex-Agro”.