. The potato; a practical treatise on the potato, its characteristics, planting, cultivation, harvesting, storing, marketing, insects, and diseases and their remedies . FiG. 32—A r\v>.)-in>RSK rri,ii\AroRA requisite wherever large areas of potatoes are grown. tillage work for the third and subsequent cultivations,and the spike-tooth expansible cultivator with theshields is an excellent tool for shallow tillage, as itdestroys the small weeds and helps to maintain a soilmulch. no THE POTATO Mulching.—In some districSls good yields havebeen obtained by mulching the land with straw,s
. The potato; a practical treatise on the potato, its characteristics, planting, cultivation, harvesting, storing, marketing, insects, and diseases and their remedies . FiG. 32—A r\v>.)-in>RSK rri,ii\AroRA requisite wherever large areas of potatoes are grown. tillage work for the third and subsequent cultivations,and the spike-tooth expansible cultivator with theshields is an excellent tool for shallow tillage, as itdestroys the small weeds and helps to maintain a soilmulch. no THE POTATO Mulching.—In some districSls good yields havebeen obtained by mulching the land with straw,shavings, pine straw, or some similar substance, insteadof cultivating it. Waugh found that it increased the. FIG. 33 — iiNK-HoKsl ^ I Kl N(,-I OOTH CULllVATORAn excellent tool for the later cultivations. yield in Oklahoma and similar results were obtainedin New Jersey,^ while in Georgia,^ Michigan,^ Wis-consin,^ and in my own trials in New York, it wasfound to be unprofitable, even when the yields obtainedwere about the same under both conditions. Okla. Bui. 15, p. 32. 3 Ga. Bui. 29, p. 348. * Wis. Report, 1899, p. 209. 2 N. J. Report, 1901, p. 418.* Mich. Bui- 95, pp. 13-16. CHAPTER X OBSTRUCTIONS TO GROWTH ANDDEVELOPMENT The obstrudlions to growth may be treated underthe following heads: 1. Season a7id Climate. 2. Weeds. 3. Diseases due to parasitic fiaigi and bacteria. 4. Insects. 5. Arseyiical poisoning. I. Influence of Season and Climate.—The in-jurious influence of dry weather at planting-time hasalready been observed (Viabilit}-, page 66). Atthe (Hatch) Massachusetts Experiment Station it wasobserved that the wet condition of the soil at the timeof planting appeared to induce the
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