The Farm...Macmillan, 1927 - 462 pages |
Contents
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Common terms and phrases
acid acre agriculture alfalfa algæ ammonia animals atmosphere average bacteria Bull bushels calcium carbon cent clay climate clover colloid combinations compared composition corn cultivation depth drain drainage waters effective element energy especially example excess Experiment Station fact farmer farming farmyard manure feces feed fertility field finely divided fixation fungi grain ground growing growth Illinoisan inches increase kind labor land legumes lime loess loss magnesium material means micro-organisms Mixed minerals moisture nature nitrate of soda nitrates nitrification Nitro nitrogen fixation nurse crop organic matter oxygen particles peat Phos phosphate phosphorus plant-food plants plot plow potash potassium pounds of nitrogen practically prairie problem processes profitable protozoa rain rainfall regions river rock roots rotation Rothamsted Rothamsted Experiments salts sand season silt loam soluble subsoil sulfate Superphosphate supply surface soil TABLE tile tion tons treatment unmanured vegetation weeds wheat Wisconsin yield
Popular passages
Page 162 - ... clearly show that a fertile soil is one which has accumulated within it the residue of ages of previous vegetation, and that it becomes infertile as this residue is exhausted...
Page 301 - ... saliva; and I propose to give some account of the growth of these plants on this Clover-exhausted soil. That the surface-soil had become very poor in nitrogen is evident from the fact, that the mean percentage of it in the sifted dry surfacesoil of 5 of the Clover plots was, in March 1881, only 0'1058, which is considerably lower than was found in the same field many years before, and lower than has been found in any of the fields at Rothamsted excepting those where crops have been grown for...
Page 162 - Finally, it has been maintained by some that a soil is a laboratory, and not a mine. But not only the facts ascertained in our own and in other investigations, but the history of agriculture throughout the world, so far as...
Page 227 - The blood of old ploughmen runs hard in my arm Of axmen and yeomen and battlemen all Who fought and who flinched not by marish and wall Who met the bold day and chased ev'ry alarm; My father-kind sleep, but I -hear the old call And fight the hot battle by forge and by farm: — For these are my lands...
Page 402 - Whatever our philosophy of human motives, we must face the fact that men do "raise more corn to feed more hogs to buy more land to raise more corn to feed more hogs to buy more land...
Page 384 - Summarizing, it may be said: (1) By a proper combination of the various elements used in fertilization one can undoubtedly largely govern the quality and flavor of the fruit. (2) To obtain a fruit with thin rind, use nitrogen from inorganic sources in moderate quantities, with considerable potash and lime. (3) To sweeten the fruit, use sulphate of ammonia in considerable abundance, decreasing the amount of potash. (4) To render the fruit more acid, increase the amount of...
Page 397 - The silver, he says, is mine; and the gold is mine; mine is every beast of the forest, and the cattle upon a thousand hills.
Page ix - If a man has spent the greater part of his life as a teacher of agriculture and an experimenter, and has been a successful farmer at the same time, and has had the advantage of much travel, his opinions on farm methods should be invaluable to his fellows. If, in addition to all this, he has had a philosophic turn of mind, and has persistently inquired into the reasons and results of all that he has seen, it would seem to be nothing less than a public misfortune if he should fail to leave some of...
Page 300 - ... 1851 ; and in the fourth year about half as much as in the first. There was then no more Clover until the seventh year, when there was very little. More or less was afterwards obtained in the eleventh, seventeenth, twenty-third (on one plot), and lastly (on one plot) in the twenty -seventh year; but, in no case excepting in the fourth year, was the amount of produce half as much as in the first year.
Page 61 - QUACK-GRASS is a very important common weed in that section of the United States north of the Ohio River and east of the Missouri River.