Soils: Their Properties, Improvement, Management, and the Problems of Crop Growing and Crop Feeding

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O. Judd, 1907 - 303 Seiten
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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...

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