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Research of Its Displacement after Seeds Touching Soil Controlled by the Furrow Opener of Precision Planter and Its Parts

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Tutor: MaXu
School: Jilin University
Course: Agricultural Mechanization Engineering
Keywords: precision planting,furrow opener,computer simulation,touching soil of seed,displ
CLC: S223.2
Type: PhD thesis
Year:  2006
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Abstract:
The precision planting is an advanced planting method, a necessary way to achieve agricultural modernization and also an important step to increase crop yield, income, and decrease cost of grain production. The precision planting provides accurate placement of seeds to soil at equal interval within rows and seeding depth; it is a complicated process comprising of profile modeling, ditching, fertilizing, planting, covering and suppressing; the requirements of its field performance are quite strict; its design is difficult and cost of its trial-manufacture and field test is high. The presently used design mothod is repeated field tests and improvement. For a long time scientists have studied hard on fundamental theory of precision planting, but their researches focus on mainly whether seeds are given in an even space distribution, a simulation research of seeds distribution in field by Monte Carlo theory(statistic simulation method), and theoretical analysis of single component and practical experiment of whole machine. All of these researches studied little on the position change of the seed, the displacement of seed bouncing and rolling after its touching soil in analyzing seeds distribution in field using precision planting machine. JiLin University of Technology has studied and calculated the displacement of seed bouncing and rolling after it touching soil, but only analyzed the process in static view.This paper researched on displacement control of seed bouncing and rolling after it touching soil and design of furrow opener. After reviewing the research development of precision planting technology, design of furrow opener, and application computer simulation technology on farm machinery, the mathematical relation model of seed bouncing and rolling displacement after it touching soil influenced by ditch shapes and
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