What's In The Bag
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Explains how plant foods are produced and describes their functions in plant growth. Discusses the sources of raw materials for the primary plant foods, how they are processed and how they are combined to produce complete chemical fertilizers.
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Sources
- 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, creator, length, format, sound, description
- 16mm Filmography (legacy record) — year, catalog record
Original permalink · Record added 2023-02-27 06:47:36