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CNAA / Theses / 2018 / July /

The argumentation of constructive and technological parameters of working parts of ploughshare gutter for row crops

Author: Nazar Boris
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 6 July, 2018
Approved by NCAA on the 23 November, 2018


Adobe PDF document1.21 Mb / in romanian


CZU 631.331.81:633.1

Adobe PDF document 6.96 Mb / in romanian
196 pages


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


The work goal: The main goal of the work is to reduce traction parameter and improve the quality of seeding process through improvement of dosing process and incorporation seeds in the soil.

The research was focused on following major work objectives:

Scientific novelty of results:the work scientific innovation consists in solving important scientific issue addressed in this work: determination of optimum operating mode of implement the distribution apparatus with the internal dosing surface, gutter shape and constructive parameters in order to improve the quality of precision seeding and reduce tension parameter.

The theoretical significance of the work: consists in theoretical argumentation of the seed dosage conditions, and to determine the theoretical traction parameter and conditions which ensures gutter stable operating process.

The applicative value of the work: is ensured by theoretical and experimental recommendations regarding the construction of the seed distribution system and coulter, which allows an improvement in quality precision seeding and a reduction of 12-15% of traction parameter.

Implementation of scientific results:research were implemented in the experimental didactic resort ”Petricani” in the State Agrarian University of Moldova, as well as agricultural enterprises in the Republic of Moldova