Farm Development: An Introductory Book in Agriculture, Including a Discussion of Soils, Selecting & Planning Farms, Subduing the Fields, Drainage, Irrigation, Roads, Fences, Together with Introductory Chapters Concerning Farm Business, and the Relations of General Science to AgricultureOrange Judd Company, 1910 - 391 páginas |
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Página vi
... Glacier and old Lake Agassiz . 8 Cross section of Minnesota river . 9 Cross section of Mississippi river . 10 11 12 Ancient and present drainage basin of Minnesota river . Levels of the Mississippi and Minnesota rivers in glacial times ...
... Glacier and old Lake Agassiz . 8 Cross section of Minnesota river . 9 Cross section of Mississippi river . 10 11 12 Ancient and present drainage basin of Minnesota river . Levels of the Mississippi and Minnesota rivers in glacial times ...
Página 32
... glaciers , earthquakes , heat , cold and other forces , during many ages , has broken up this surface into smaller particles which form the larger part of our soil as we see it today . Some of the lower forms of plant life which live ...
... glaciers , earthquakes , heat , cold and other forces , during many ages , has broken up this surface into smaller particles which form the larger part of our soil as we see it today . Some of the lower forms of plant life which live ...
Página 34
... glaciers , to lie upon and flow or glide very slowly over large areas of land near the north and south poles of the globe . These glaciers , which once pushed much farther out from the poles toward the equator than now , have done much ...
... glaciers , to lie upon and flow or glide very slowly over large areas of land near the north and south poles of the globe . These glaciers , which once pushed much farther out from the poles toward the equator than now , have done much ...
Página 36
... glacier . In the beginning the zone of perpetual snow of the arctic circle gradually extended southward as the cold con- tinued to increase from age to age . The cold crept southward and extended the southern edge of the region of ...
... glacier . In the beginning the zone of perpetual snow of the arctic circle gradually extended southward as the cold con- tinued to increase from age to age . The cold crept southward and extended the southern edge of the region of ...
Página 37
... glacier . The Mississippi valley was then much as it is now , the ele- vated plains toward the Rocky Mountains preventing the ice sheet from flowing in that direction . The higher land at the foot of the Alleghanies also prevented the ...
... glacier . The Mississippi valley was then much as it is now , the ele- vated plains toward the Rocky Mountains preventing the ice sheet from flowing in that direction . The higher land at the foot of the Alleghanies also prevented the ...
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Farm Development; An Introductory Book in Agriculture, Including a ... W. M. Hays Sin vista previa disponible - 2017 |
Términos y frases comunes
acre agricultural amount of water animals better biped bottom brace building canal capillary capillary action capstan carry cement cents clay construction corn corner post cost crop rotation crops cubic yard cultivation culverts datum deep depth drain tiles drainage earth engine expense farm home farmers farmstead feet fence fields flood water flow Fresno scraper furrow-slice furrows gate glacial glacier grade grain Grass gravel ground water height Illustrated inches instrument irrigation labor lake Lake Agassiz layer low area macadam material mile Minnesota Minnesota river Mississippi river mixed moisture necessary open ditch outlet particles peat plow practical profitable rain rainfall reversible road machine river road roller roadway rock roots rotation rural sand schools showing shown in Figure side soil spade station stone stream stumps subsoil tile drains tion tivated trees wagon wheat wire fence