一、根据需要选型　　由于机车型号、性能特点不同，应根据当地交通状况、地理环境、货源及用途等情况来选择。选购耕作机械时，还应考虑土壤性质及田间通过性能。不要购已停产或淘汰的车型，以及当地少见的车型，以防今后配件供应不上，影响作业。对已进入报废期的、来源不明 First, according to the needs of selection As locomotive models, different performance characteristics, should be based on local traffic conditions, geographical environment, supply and use of such circumstances to choose. When purchasing tillage machinery, soil properties and field performance should also be considered. Do not buy the models have been discontinued or eliminated, as well as the rare local models to prevent future parts supply is not on, affecting homework. Has entered the period of retirement, the source unknown