![](http://assets.echocommunity.org/book/439f5d89-7ebc-4e0e-a1b0-8e0a50256a98/hummert-s-helpful-hints_thumbnail.jpg?w=400)
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
Chi tiết Ấn phẩm
- Phát hành: 1999
- Nhà Xuất Bản: Hummert International
- Dewey Decimal: 640.2
- Thư viện ECHO: 640.2 HUM