Drain Your Way To Profit
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✎ Suggest a correctionShows the dangers of over-saturation which allow no air-space in soil for necessary nitrogen. Tells how clay tile drainage can improve root depth, speeds germination and facilitates cultivation.
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- A-V Online (National Information Center for Educational Media). CD-ROM database of educational and documentary media, compiled and maintained by the National Information Center for Educational Media (NICEM). — title, year, creator, length, format, sound, description
- 16mm Filmography (legacy record) — catalog record
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