. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. Fig 82.—A subsoil plow in jbiG. aa.—ine worK; ot a subsoil plow. when any ''raw" subsoil is turned up, it becomes thoroughly weathered before planting time. 10. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Weir, Wilbert Walter, 1882-. Philadelphia London, J. B. Lippincott company

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsoils, bookyear1920