. Diseases and decays of Connecticut tobacco. Tobacco. 144 Connecticut Experiment Station Bulletin 432 Calcium Deficiency Calcium oxide makes up to 8 percent of the dry weight of the tobac- co plant and performs very necessary functions in metabolism. Most of our soils contain a large supply of calcium naturally and more is added in lime or land plaster as well as in bone phosphates and some of the other fertilizer materials. Consequently it is only very rarely that acute shortage of calcium occurs to a degree resulting in calcium starvation symptoms in the plant. Calcium leaches very easi
. Diseases and decays of Connecticut tobacco. Tobacco. 144 Connecticut Experiment Station Bulletin 432 Calcium Deficiency Calcium oxide makes up to 8 percent of the dry weight of the tobac- co plant and performs very necessary functions in metabolism. Most of our soils contain a large supply of calcium naturally and more is added in lime or land plaster as well as in bone phosphates and some of the other fertilizer materials. Consequently it is only very rarely that acute shortage of calcium occurs to a degree resulting in calcium starvation symptoms in the plant. Calcium leaches very easily from the soil, however, and, in the extremely wet year of 1938, starvation symptoms occurred in many fields. The symptoms appear in the unfolding bud or youngest leaves of the plant. The terminal leaves are distorted, dwarfed or fail to develop at all. The tips of the youngest leaves turn brown or black. The partly developed, deformed leaves have ragged and incised margins. The appearance of the bud is shown in Figure Figure 29. Magnesium hunger or "sand drown". Green network of veins against the white web of the leaf. The obvious remedy is to apply to the soil enough lime or land plaster to keep up the supply. At least 500 pounds to the acre of lime or land plaster should be added if starvation symptoms are found in a field. As a basis for the treatment, however, the soil should first be tested for degree of acidity and quantity of calcium. Nitrogen Starvation Nitrogen starvation causes the entire plant to turn pale and in severe cases to remain smaller and produce narrower leaves than normally. This trouble is well known by tobacco growers and is remedied by nitrate appli- cations in the bed, or by side dressing in the 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 Anderson, P. J
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Keywords: ., bookcentury1900, bookpublishernewhavenconnec, booksubjecttobacco
