Soils: Their Properties, Improvement, Management, and the Problems of Crop Growing and Crop FeedingO. Judd, 1907 - 303 Seiten |
Im Buch
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Seite 44
... NITRATES CARBON ROOT HAIRS HOW PLANT FOOD GETS INTO THE SOIL Carbon is taken in through the stomata , or mouths , on the underside of the leaf . All the mineral elements and the nitrates are in solution in the water and pass in this way ...
... NITRATES CARBON ROOT HAIRS HOW PLANT FOOD GETS INTO THE SOIL Carbon is taken in through the stomata , or mouths , on the underside of the leaf . All the mineral elements and the nitrates are in solution in the water and pass in this way ...
Seite 45
... ( nitrates ) , iron , sulphur , calcium and magnesium , as essential elements of plant growth . While manganese is present in small quantities in nearly all plants , it is not an essential element , nor are sodium , silicon , aluminum ...
... ( nitrates ) , iron , sulphur , calcium and magnesium , as essential elements of plant growth . While manganese is present in small quantities in nearly all plants , it is not an essential element , nor are sodium , silicon , aluminum ...
Seite 49
... nitrates dissolved therein carried up into the leaves , but left behind when the water is evap- are WATER CARBONIC ACID BARK SAPWOOD HEARTWOOD . SAPWOOD BARK SAP FOOD NO MOVEMENT SAP FOOD OXYGEN WATER orated into the air . When the ...
... nitrates dissolved therein carried up into the leaves , but left behind when the water is evap- are WATER CARBONIC ACID BARK SAPWOOD HEARTWOOD . SAPWOOD BARK SAP FOOD NO MOVEMENT SAP FOOD OXYGEN WATER orated into the air . When the ...
Seite 50
... nitrates and sulphur in some way so that protein results , or maybe oil or cellulose or crude fiber is manufactured- each is made just as the plant decrees . The meaning of plant - building . - Before these elements were enticed into ...
... nitrates and sulphur in some way so that protein results , or maybe oil or cellulose or crude fiber is manufactured- each is made just as the plant decrees . The meaning of plant - building . - Before these elements were enticed into ...
Seite 60
... nitrate ( saltpeter ) . Potassium is often lacking in soils . It is one of the three elements - the others being phosphorus and nitro- gen - most often purchased in commercial forms to re- inforce the insufficient quantity in the soil ...
... nitrate ( saltpeter ) . Potassium is often lacking in soils . It is one of the three elements - the others being phosphorus and nitro- gen - most often purchased in commercial forms to re- inforce the insufficient quantity in the soil ...
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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...