NY/T 740-2003

Agricultural machinery testing agencies, farmers, and ditcher manufacturers use this standard to evaluate the quality of field ditching operations. It is used to ensure key indicators such as ditch depth, shape dimensions, and soil crushing rate meet agronomic requirements. This standard is crucial for improving farmland drainage and crop planting efficiency.

农业机械检测机构、农机用户和开沟机械制造商使用本标准来评估田间开沟作业的质量。它用于确保开沟深度、沟形尺寸和碎土率等关键指标符合农艺要求。该标准对提高农田水利和作物种植效率至关重要。

This standard specifies evaluation indicators, testing methods, and inspection rules for the field operation quality of ditchers, applicable to the evaluation of field ditching operations. It defines terms such as ditch shape, ditch depth, top width, bottom width, straightness, bottom sediment thickness, bed width consistency, soil throwing uniformity, and soil crushing rate. Technical requirements and quality indicators are provided, including ditch depth stability coefficient >80% and soil crushing rate >55%. Testing methods cover measurement point selection and calculation of various parameters. Inspection rules require item-by-item assessment, with failure in any item leading to an unqualified judgment.

本标准规定了田间开沟机械作业质量的评定指标、检测方法和检验规则，适用于开沟机械田间作业质量的评定。标准定义了沟形、开沟深度、沟面宽度、沟底宽度、开沟直线度、沟底浮土厚度、畦面宽度一致性、抛土均匀性和开沟后碎土率等术语，并给出了具体的技术要求和质量指标，如开沟深度稳定性系数大于80%、碎土率大于55%等。检测方法包括测量点选取、开沟深度、沟面宽度、沟底宽度、浮土厚度、畦面宽度及碎土率的测量和计算。检验规则要求逐项考核，任何一项不合格则判定作业不合格。