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 |
Dentro del libro
Resultados 1-5 de 54
Página viii
... depth of the ditch as finally calculated .. 197 87 How water seeks the drains . 198 88 Showing disposition of earth handled with road machine and spade .. 199 89 Different dimensions of ditch for receiving drain tiles of different sizes ...
... depth of the ditch as finally calculated .. 197 87 How water seeks the drains . 198 88 Showing disposition of earth handled with road machine and spade .. 199 89 Different dimensions of ditch for receiving drain tiles of different sizes ...
Página 52
... depth , of more or less finely divided . mineral materials , and our present soils have been a long time in reaching a condition suitable for growing crops . In other cases the layer of pulverized material , coarse or fine , or coarse ...
... depth , of more or less finely divided . mineral materials , and our present soils have been a long time in reaching a condition suitable for growing crops . In other cases the layer of pulverized material , coarse or fine , or coarse ...
Página 61
... depth . Soil body and soil fertility . - The solid body , or frame- work , of the soil usually makes up 90 per cent , or more , of the weight , and is composed of the solid particles of clay , sand and stone from which the soil was made ...
... depth . Soil body and soil fertility . - The solid body , or frame- work , of the soil usually makes up 90 per cent , or more , of the weight , and is composed of the solid particles of clay , sand and stone from which the soil was made ...
Página 71
... depth . When rain causes the surface of the free water , or ground water , in the soil to rise , the air is , of course , crowded out of this saturated part , but when the surface of the zone saturated with water , is again lowered by ...
... depth . When rain causes the surface of the free water , or ground water , in the soil to rise , the air is , of course , crowded out of this saturated part , but when the surface of the zone saturated with water , is again lowered by ...
Página 72
... depth of several inches . Extent of roots of stem roots - send out many branches with sub- crops . - The roots of ... depths than is generally realized . On fairly open , easily pene- trable soils , where the upper portion of the earth ...
... depth of several inches . Extent of roots of stem roots - send out many branches with sub- crops . - The roots of ... depths than is generally realized . On fairly open , easily pene- trable soils , where the upper portion of the earth ...
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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