. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. A B Fia. 169,—The development of good sod increases the soil organic matter. A, root develop- ment on land properly fertilized; B, root growth on same land but unfertilized. matter in the soil also improves the workability of soils and maintains good tilth. The growing of grass, pasture and deep^' rooted legumes on heavy soils greatly aids in improving their tilth. On a portion of a field (silt loam) at the University of Illinois, corn was grown continuotisly for forty years; while on anot
. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. A B Fia. 169,—The development of good sod increases the soil organic matter. A, root develop- ment on land properly fertilized; B, root growth on same land but unfertilized. matter in the soil also improves the workability of soils and maintains good tilth. The growing of grass, pasture and deep^' rooted legumes on heavy soils greatly aids in improving their tilth. On a portion of a field (silt loam) at the University of Illinois, corn was grown continuotisly for forty years; while on another portion, during the same period, a three-year rotation was prac- ticed, consisting of corn, oats and clover. The soil on the first portion has become compact, it *^runs together^' badly, and heavy. 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
