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
... moisture . Pot of soil moistened by 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 ...
... moisture . Pot of soil moistened by 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 ...
Página 35
... moisture , and to provide bacterial and other agencies which aid in producing conditions suitable for the feeding by the plant roots . In some places these congenial soils are formed by the rock decaying where it lies ; in other places ...
... moisture , and to provide bacterial and other agencies which aid in producing conditions suitable for the feeding by the plant roots . In some places these congenial soils are formed by the rock decaying where it lies ; in other places ...
Página 40
... moisture , serve as hospitable homes to useful soil bacteria , and are easily handled with cultivating implements . Assorted till formed poor soils . - Wherever the water assorted the great body of materials drifted along by the glacier ...
... moisture , serve as hospitable homes to useful soil bacteria , and are easily handled with cultivating implements . Assorted till formed poor soils . - Wherever the water assorted the great body of materials drifted along by the glacier ...
Página 51
... moisture may not readily rise quite to the surface by capillary action , but be stopped before it reaches the surface where it would 66 66 99 99 be readily evaporated . The term " furrow pan " is sometimes used to designate a layer at ...
... moisture may not readily rise quite to the surface by capillary action , but be stopped before it reaches the surface where it would 66 66 99 99 be readily evaporated . The term " furrow pan " is sometimes used to designate a layer at ...
Página 54
... sufficient to crumble the lava . Spores of minute lichens fall upon hard rock , germinate and form small plants . These live mostly upon moisture and air , obtaining some food from the dust and soil particles continually 54 FARM ...
... sufficient to crumble the lava . Spores of minute lichens fall upon hard rock , germinate and form small plants . These live mostly upon moisture and air , obtaining some food from the dust and soil particles continually 54 FARM ...
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Farm Development; An Introductory Book in Agriculture, Including a ... W. M. Hays Sin vista previa disponible - 2017 |
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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