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 vii
... inch wye level . 158 59 Leveling instrument made of mason's spirit level . 159 60 Mason's level on tripod with sights . 160 61 Homemade leveling instrument . 161 62 Band chain of steel . 162 63 Surveyor's chain folded . 163 64 ...
... inch wye level . 158 59 Leveling instrument made of mason's spirit level . 159 60 Mason's level on tripod with sights . 160 61 Homemade leveling instrument . 161 62 Band chain of steel . 162 63 Surveyor's chain folded . 163 64 ...
Página x
... inches of gravel on peat . 305 185 186 Roadside ditches made with slush scraper . 309 309 310 310 311 311 311 312 313 313 198 Railroad plow used for road work .. 314 198a Reversible road machine doing its own plowing . 314 199 ...
... inches of gravel on peat . 305 185 186 Roadside ditches made with slush scraper . 309 309 310 310 311 311 311 312 313 313 198 Railroad plow used for road work .. 314 198a Reversible road machine doing its own plowing . 314 199 ...
Página 57
... inches to many feet in thickness covers , or partially covers , areas of very moist land , and even of lakes . In some cases , even where the peaty substances are thick , sand and clay have been washed in from adjacent hillsides , and ...
... inches to many feet in thickness covers , or partially covers , areas of very moist land , and even of lakes . In some cases , even where the peaty substances are thick , sand and clay have been washed in from adjacent hillsides , and ...
Página 61
... inch of ordinary field soil magnified into a cubic mile . It would then present very much the appear- ance of a mass of rocks varying from the size of a pea to masses several feet in diameter . Scattered among these rock masses would be ...
... inch of ordinary field soil magnified into a cubic mile . It would then present very much the appear- ance of a mass of rocks varying from the size of a pea to masses several feet in diameter . Scattered among these rock masses would be ...
Página 67
... inch and less in diameter . Soil materials divided into these very small particles have an immense total surface area . Many of the tiny surfaces are applied so closely together that they exclude air , and even water , from coming in ...
... inch and less in diameter . Soil materials divided into these very small particles have an immense total surface area . Many of the tiny surfaces are applied so closely together that they exclude air , and even water , from coming in ...
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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