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
... rain . 18 19 20 21 22 23 24 25 Pot of soil in state of saturation .. 26 Pot of soil after drainage of ground water . 27 28 Pot of soil illustrating the action of capillarity . Pot of soil dried by exposure to air and baking .. 29 Pot of ...
... rain . 18 19 20 21 22 23 24 25 Pot of soil in state of saturation .. 26 Pot of soil after drainage of ground water . 27 28 Pot of soil illustrating the action of capillarity . Pot of soil dried by exposure to air and baking .. 29 Pot of ...
Página 32
... rains washed these plant and animal remains into streams , and , together with par- ticles of soil , they were deposited along the river beds or deltas in layers . Where earthquakes , the washing of water or other influences have ...
... rains washed these plant and animal remains into streams , and , together with par- ticles of soil , they were deposited along the river beds or deltas in layers . Where earthquakes , the washing of water or other influences have ...
Página 34
... rains falling on the high places of the earth's surface washed the looser particles to the low places and with them the forms of life that then existed , thus leaving a record of the times in the fossils preserved in the layers thus ...
... rains falling on the high places of the earth's surface washed the looser particles to the low places and with them the forms of life that then existed , thus leaving a record of the times in the fossils preserved in the layers thus ...
Página 36
... rain and snowfall of each season was added to the layer which fell the year before , and thus there gradually accumulated a sheet of snow and ice hundreds of feet thick , extending southward far into the Mississippi valley basin in ...
... rain and snowfall of each season was added to the layer which fell the year before , and thus there gradually accumulated a sheet of snow and ice hundreds of feet thick , extending southward far into the Mississippi valley basin in ...
Página 37
... rain accumulations had become pressed into a solid sheet of ice , hundreds and even thousands of feet in thickness . We would expect that this ice would lie quietly on the surface of the earth , but it is found . that ice will flow to a ...
... rain accumulations had become pressed into a solid sheet of ice , hundreds and even thousands of feet in thickness . We would expect that this ice would lie quietly on the surface of the earth , but it is found . that ice will flow to a ...
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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