该书已不再出版。
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Hummert's Helpful Hints is a handy reference to the formulas, calculations and tables that give equivalencies, parts per million, measurements of pH, soluble salt and geometric areas. Also covers fertilizers, irrigation, light and lighting, plant structures & more.
35 pages, illustrated
出版物详细信息
- 已出版: 1999
- 出版者: Hummert International
- Dewey Decimal: 640.2
- ECHO 图书馆: 640.2 HUM