本工程实践提供了与工程中有用数量相关的国际单位制计量单位 描述用于农业工程应用的所有类型的辐射。有助于建立统一的 在农业工程文献中，它还提供了代表这些内容的公认符号 以及适用于这些辐射量的国际单位制单位的批准符号。这个 还列出了用于辐射量的主要常用单位，并提供了系数 用于将这些常用单位转换为国际单位制。

This Engineering Practice provides the SI units of measurement associated with quantities useful in describing all types of radiation for agricultural engineering applications. As an aid in establishing uniformity in the agricultural engineering literature, it also provides the generally accepted symbols which represent those quantities and the approved symbols for the units of the SI system applicable to those radiation quantities. The principal customary units that have been used for radiation quantities are also listed and factors are provided for conversion of those customary units to SI units.