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 27
... organic substances which manifests itself in many ways , and which is rendered active by some molecular disturbance , as from friction , rupture , or chem- ical action . The laws of the generation , storage , trans- portation and use of ...
... organic substances which manifests itself in many ways , and which is rendered active by some molecular disturbance , as from friction , rupture , or chem- ical action . The laws of the generation , storage , trans- portation and use of ...
Página 28
... organic life through the geological ages to the plant and animal forms now on the surface of the earth . It has very prac- tical relations to studies of soils , farm management , and to plant and animal production , as well as to mining ...
... organic life through the geological ages to the plant and animal forms now on the surface of the earth . It has very prac- tical relations to studies of soils , farm management , and to plant and animal production , as well as to mining ...
Página 29
... organic substances , which aid in elaborating plant food from soil and air , which assist in transforming the food in the digestive canal of the animal , and in many other ways take part in plant and animal production . Bac- teria and ...
... organic substances , which aid in elaborating plant food from soil and air , which assist in transforming the food in the digestive canal of the animal , and in many other ways take part in plant and animal production . Bac- teria and ...
Página 32
... organic matter which , together with the disintegrated soil par- ticles , formed rich soils on which higher plants and animals could grow . As the ages passed a large growth of plants developed on the surface , and the organized matter ...
... organic matter which , together with the disintegrated soil par- ticles , formed rich soils on which higher plants and animals could grow . As the ages passed a large growth of plants developed on the surface , and the organized matter ...
Página 40
... organic fertilizers , favor the elaboration and storage of plant food as well as the absorption and conservation of soil moisture , serve as hospitable homes to useful soil bacteria , and are easily handled with cultivating implements ...
... organic fertilizers , favor the elaboration and storage of plant food as well as the absorption and conservation of soil moisture , serve as hospitable homes to useful soil bacteria , and are easily handled with cultivating implements ...
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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
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