. Circular. Agriculture; Agriculture; Entomology. On the Upland On the upland, also, the chief problem is one of drainage. Here we no longer have the tide action to take into consideration but must depend solely on gravity. The elimination of the many large fresh- water swamps is again an engineering problem. Systems must be worked out providing sufficiently rapid outlets of the water to prevent its standing and breeding mosquitoes. Open ditches ordinarily are used, although tile drains or filling is. recommended when the expense is not too great. Doing the work with tile, or fill- ing-in give
. Circular. Agriculture; Agriculture; Entomology. On the Upland On the upland, also, the chief problem is one of drainage. Here we no longer have the tide action to take into consideration but must depend solely on gravity. The elimination of the many large fresh- water swamps is again an engineering problem. Systems must be worked out providing sufficiently rapid outlets of the water to prevent its standing and breeding mosquitoes. Open ditches ordinarily are used, although tile drains or filling is. recommended when the expense is not too great. Doing the work with tile, or fill- ing-in gives a more permanent result and does away to a large extent with the ne- cessity for future maintenance. Over-. Fig. 20—{Above). A Dike on the Essex County Meadows Fig. 21—(to the right) A Tide-Gate at Low Tidi in Bergen County. 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 New Jersey Agricultural Experiment Station; New Jersey Agricultural College. Experiment Station. New Brunswick, New Jersey Agricultural Experiment Station
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Keywords: ., bookcentury1900, booksubjectagriculture, booksubjectentomology
