“seedling gradation”的概念、定义、翻译、参考文献-科学参考

单词	seedling gradation
释义	seedling gradation Encyclopedia 农学〔苗木培育〕释 seedling gradation苗木分级对需要出圃的苗木按苗木质量标准进行等级划分。目的是使出圃苗达到国家规定标准，保证用壮苗造林，减少造林后的苗木分化现象，提高造林成活率和林木生长量。
随便看	ultrasonic probe ultrasonic processing tools ultrasonic processing transducer ultrasonic Q switching ultrasonic Q-switching ultrasonic reactor ultrasonic rock specimen tester ultrasonics ultrasonic sensor ultrasonic soldering ultrasonic sound ultrasonic spectrum analysis ultrasonic stage recorder ultrasonic stroboscope ultrasonic surface treatment ultrasonic testing ultrasonic test instrument ultrasonic therapy ultrasonic thickness meter ultrasonic tissue phantom ultrasonic transducer ultrasonic vibration assisted laser machining ultrasonic vibration drilling ultrasonic vibration extrusion strengthening ultrasonic vibration finishing

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