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
... Subsoil , furrow - slice and dust blanket . 84 84 stone . 35 Pervious mass of soil over a layer of impervious clay or 36 How flowing wells occur . 37 Plan of farmstead with road on north . 85 86 101 38 Plan of farmstead with road on ...
... Subsoil , furrow - slice and dust blanket . 84 84 stone . 35 Pervious mass of soil over a layer of impervious clay or 36 How flowing wells occur . 37 Plan of farmstead with road on north . 85 86 101 38 Plan of farmstead with road on ...
Página 41
... subsoils . In other cases the unassorted till forming the surface contains bowlders , which are an impediment to cultivation . There are areas within the glacial region over which the glacier did not flow ; some are covered with soils ...
... subsoils . In other cases the unassorted till forming the surface contains bowlders , which are an impediment to cultivation . There are areas within the glacial region over which the glacier did not flow ; some are covered with soils ...
Página 51
... Subsoil " refers to that part of the soil below the furrow - slice . The terms " dust blanket and dirt mulch are often used to indicate that upper por- tion of the furrow - slice which is kept open and mellow , as by intercultural ...
... Subsoil " refers to that part of the soil below the furrow - slice . The terms " dust blanket and dirt mulch are often used to indicate that upper por- tion of the furrow - slice which is kept open and mellow , as by intercultural ...
Página 68
... subsoil with the surface soil . Clover , alfalfa , corn and other plants with long roots which die and decay , leave air passages in the soil . After rains in summer , when the soil is moist and at a temperature suited to the growth of ...
... subsoil with the surface soil . Clover , alfalfa , corn and other plants with long roots which die and decay , leave air passages in the soil . After rains in summer , when the soil is moist and at a temperature suited to the growth of ...
Página 71
... subsoil . Plowing and subsoiling give aid to all these forces . which tend to make air circulate in the soil . In very dry weather , clay soils sometimes become so much shrunken that large cracks are produced and through these the air ...
... subsoil . Plowing and subsoiling give aid to all these forces . which tend to make air circulate in the soil . In very dry weather , clay soils sometimes become so much shrunken that large cracks are produced and through these the air ...
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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