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 7
... sands of men engaged in research in all phases of agricul- ture . Many of the states have appropriated money for branch stations , and the United States Department of Agriculture also has established outposts for research under its ...
... sands of men engaged in research in all phases of agricul- ture . Many of the states have appropriated money for branch stations , and the United States Department of Agriculture also has established outposts for research under its ...
Página 35
... sand , which does not easily decay , vegetation has not been able to grow and the surface is still bare and not hospitable to plants . Between these two extremes , where soils have been made of clay or of a mixture of clay and sand and ...
... sand , which does not easily decay , vegetation has not been able to grow and the surface is still bare and not hospitable to plants . Between these two extremes , where soils have been made of clay or of a mixture of clay and sand and ...
Página 36
... sand and gravel are not suitable soils from which plants can secure food . The glacial period . - Beginning tens of thousands of years ago , and continuing , perhaps , ten thousand years , a most important occurrence of vast proportions ...
... sand and gravel are not suitable soils from which plants can secure food . The glacial period . - Beginning tens of thousands of years ago , and continuing , perhaps , ten thousand years , a most important occurrence of vast proportions ...
Página 38
... sand , clay , etc. , covering the underlying rocks of the region over which the glacier flowed . The ice , in flowing over this surface , gathered up much of the loose clay , sand and stones , and also tore loose and ground up more of ...
... sand , clay , etc. , covering the underlying rocks of the region over which the glacier flowed . The ice , in flowing over this surface , gathered up much of the loose clay , sand and stones , and also tore loose and ground up more of ...
Página 39
... sand and clay , depositing the heaviest particles first . The finer particles of clay and silt are often carried long dis- tances before they are deposited in the quiet waters of some lake or large stream . Since the fine particles were ...
... sand and clay , depositing the heaviest particles first . The finer particles of clay and silt are often carried long dis- tances before they are deposited in the quiet waters of some lake or large stream . Since the fine particles were ...
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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 animals better biped bottom brace building canal capillary capillary action capstan carry cement cents clay clover 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 limestone 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 roadside 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