. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 258 HAHMFUL AGENTS IN SOILS AFFECTING FERTILITY disease infested -fields are remedies suggested to control these diseases or to avoid injury from them. Sometimes plants may be developed that are resistant to certain diseases. Cabbage resistant to yellows is a good illustration (Fig. 165). Too. Much Water Is Harmful.—On lowlands the harmful effect of too much water is commonly observed, but the lack of proper drainage on some upland fields having good sinrface drain- age is very often least
. Productive soils; the fundamentals of successful soil management and profitable crop production. Soils. 258 HAHMFUL AGENTS IN SOILS AFFECTING FERTILITY disease infested -fields are remedies suggested to control these diseases or to avoid injury from them. Sometimes plants may be developed that are resistant to certain diseases. Cabbage resistant to yellows is a good illustration (Fig. 165). Too. Much Water Is Harmful.—On lowlands the harmful effect of too much water is commonly observed, but the lack of proper drainage on some upland fields having good sinrface drain- age is very often least suspected. Frequently certain fields or portions of them are found to grow good crops of hay and grain. 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
