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 33
... sufficiently , it was found that the very first forms of animal and vegetable life appeared , but the earth was not in a settled form even when these appeared , for the geologist finds in the layers of rocks of elevated regions the ...
... sufficiently , it was found that the very first forms of animal and vegetable life appeared , but the earth was not in a settled form even when these appeared , for the geologist finds in the layers of rocks of elevated regions the ...
Página 38
... sufficiently rapid , in spite of the slow forward movement of the frozen water , so that the ice which flowed to a given point , and there melted , added an immense amount of water to the usual rainfall . All this water swelled the ...
... sufficiently rapid , in spite of the slow forward movement of the frozen water , so that the ice which flowed to a given point , and there melted , added an immense amount of water to the usual rainfall . All this water swelled the ...
Página 51
... sufficient water to partially fill the interstices , giving room for considerable air . Some plants prefer a soil so saturated with water that the air is excluded . Still other plants like best to have a saturated peaty soil , and some ...
... sufficient water to partially fill the interstices , giving room for considerable air . Some plants prefer a soil so saturated with water that the air is excluded . Still other plants like best to have a saturated peaty soil , and some ...
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 ...
Página 59
... sufficient amount of this copper solution is allowed to drip to give it a strength of one part in 5,000,000 , or one fifty - thousandth part of one per cent . This strength of solution has been THE SOIL AND SOIL FORMATION 59.
... sufficient amount of this copper solution is allowed to drip to give it a strength of one part in 5,000,000 , or one fifty - thousandth part of one per cent . This strength of solution has been THE SOIL AND SOIL FORMATION 59.
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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