Soils: Their Properties, Improvement, Management, and the Problems of Crop Growing and Crop FeedingO. Judd, 1907 - 303 Seiten |
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Seite 1
... follows that at a depth of 15 to 20 miles below the surface the earth is red hot , while the heat 100 miles deeper , if applied at the surface , would liquefy all mate- rials at the surface crust . These known facts have led to an ...
... follows that at a depth of 15 to 20 miles below the surface the earth is red hot , while the heat 100 miles deeper , if applied at the surface , would liquefy all mate- rials at the surface crust . These known facts have led to an ...
Seite 3
... follow . The soil : the clothing of the earth . The real cloth- ing of the earth is the soil - and we are to study it : the good , kind soil that brings us so many useful and beau- tiful and wholesome things . For with the soil is the ...
... follow . The soil : the clothing of the earth . The real cloth- ing of the earth is the soil - and we are to study it : the good , kind soil that brings us so many useful and beau- tiful and wholesome things . For with the soil is the ...
Seite 7
... follow about the soil makers , the agencies that have been at work making the soil . Important ? Yes , in a way ; but if you see the matter as I do , you are more interested in having the soil dem- onstrate what it can do now , rather ...
... follow about the soil makers , the agencies that have been at work making the soil . Important ? Yes , in a way ; but if you see the matter as I do , you are more interested in having the soil dem- onstrate what it can do now , rather ...
Seite 19
... follows , then , that every kind of plant is a soil builder . The decay of the plant at once produces a change in the texture of the soil - making material . It is this addition of the organic matter the dead plant - that produces this ...
... follows , then , that every kind of plant is a soil builder . The decay of the plant at once produces a change in the texture of the soil - making material . It is this addition of the organic matter the dead plant - that produces this ...
Seite 25
... follows : fine gravel , coarse sand , medium sand , fine sand , very fine sand , silt , fine silt and clay . To these components let us add humus , moisture , the sol- uble plant food elements , and we shall have the soils of our fields ...
... follows : fine gravel , coarse sand , medium sand , fine sand , very fine sand , silt , fine silt and clay . To these components let us add humus , moisture , the sol- uble plant food elements , and we shall have the soils of our fields ...
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Andere Ausgaben - Alle anzeigen
Soils; Their Properties, Improvement, Management, and the Problems of Crop ... Charles William Burkett Keine Leseprobe verfügbar - 2019 |
Soils; Their Properties, Improvement, Management, and the Problems of Crop ... Charles William Burkett Keine Leseprobe verfügbar - 2017 |
Häufige Begriffe und Wortgruppen
abundance acid phosphate acre alfalfa ammonia animals applied available plant food bacteria barnyard better bushels carbon cent clay clover compounds condition contains corn cotton cow peas crop rotation cultivated crop culture dairying decay deep disk drainage earth effect elements fact farm farmer favor feeding fertilizer fertilizing materials field follows forms given grass ground grow growth harrow hence humus inches increase inoculation kainit kind labor land legume leguminous lime live stock loss materials mellow mineral mixed moisture mulch nature nitrate of soda nitrates nitrification nitrifying bacteria nitrogen nitrogen fixation organic matter oxygen phosphoric acid phosphorus plant food plant roots plow poor potash pounds production quantity rain reason rock sand secured seed silt soluble sort spreader stable manure subsoil substances sulphate supply surface theory things tile drain tillage tion tons tubercle vegetable weeds wheat yield
Beliebte Passagen
Seite 293 - ... some waste their whole lives " in studying how to arm death with new engines of " horror, and inventing an infinite variety of slaughter ; " but think it beneath men of learning (who only are " capable of doing it) to employ their learned labours " in the invention of new, or even improving the old, " instruments for increasing of bread.
Seite iii - Where grows ? — where grows it not? If vain our toil, We ought to blame the culture, not the soil...
Seite 300 - I teach The earth and soil To them that toil, The hill and fen To common men That live just here; The plants that grow, The winds that blow, The streams that run In rain and sun Throughout the year; The shop and mart, The craft and art, The men to-day, The part they play In humble sphere; And then I lead Thro' wood and mead By bench and rod Out unto God With love and cheer.
Seite 25 - ... fine gravel, coarse sand, medium sand, fine sand, very fine sand, silt, and clay.
Seite 293 - Some waste their whole Lives in studying how to arm Death with new Engines of Horror, and inventing an infinite Variety of Slaughter ; but think it beneath Men of Learning (who only are capable...
Seite 293 - Ploughing the Sea with Ships, than of Tilling the Land with Ploughs; they bestow the utmost of their Skill, learnedly, to pervert the natural Use of all the Elements for Destruction...
Seite 148 - ... and insect pests through this plan of inoculating by means of natural soils. Even though weeds may not have been serious in the first field, the great number of dormant seeds requiring but a slight change in surroundings to produce germination is always a menace. If soil...
Seite 266 - ... no branch of husbandry requires more skill and sagacity than a proper rotation of crops, so as to keep the ground always in heart, and yet to draw out of it the greatest profit possible.
Seite 165 - ... to dissolve plant food. Grasses and other succulent plants contain not, less than seventy-five per cent, of water, fruits about ninety per cent. In addition, great quantities are evaporated by the leaves. A large tree will give off an immense amount of water daily from its leaves. Over three hundred pounds of water are required to produce one pound of dry matter in a plant. Dry matter means what is left after every particle of water has been taken out. We now begin to get an idea of how much...