. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. AN IMPORTANT CONTROLLABLE FACTOR 189. Fig. 125.—Sixty-nine and one-half bushels of oats per acre. Unfertilized. (See Fig. 126.) Bundles represent growth on one square rod. (Wisconsin Station.) 1. 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