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通过对黑龙江垦区二道河农场引进美国约翰·迪尔公司的Ｊ．Ｄ．－４４５０拖拉机运用９年的情况调查，采用统计分析和农业机器管理理论，辅以微机运算分析，得出了该机型在黑龙江垦区运用的主要技术经济性指标随机龄的变化规律、为该机型的运用管理、更新换代的决策提供了理论参考依据。
Through the Heilongjiang Reclamation Erdaohe Farm to introduce the United States John Deere Company J. D. -4450 tractor using nine years of investigation, the use of statistical analysis and agricultural machinery management theory, supplemented by computer operations analysis, the model obtained in Heilongjiang reclamation area of the main technical and economic indicators of random variation of age, for the aircraft Type of management, replacement decision-making provides a theoretical basis for reference.