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
รายละเอียดสิ่งพิมพ์
- ตีพิมพ์แล้ว: 1999
- ผู้ตีพิมพ์: Hummert International
- Dewey Decimal: 640.2
- ห้องสมุด ECHO: 640.2 HUM