Industrial Booklets
Industrial Booklets
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In our eReader you can find the full English version of the book. Read Industrial Booklets Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Industrial Booklets
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Digitized by Google 66 INDUSTRIAL BOOKLETS Figure 42. Field continuously in corn for fourteen years.
Average 27 bushels per acre.
1. Need of Rotation — (1) Exhaustion of soils — (a) In New England — Character of soil.
(b) In Virginia — Tobacco raising.
(c) In the West — Grain growing.
(2) To decom- pose fertilizers — (a) How rotation helps.
(b) Decom- position can take place only with heat, air and moisture. These Figure 43. Sample of soil taken from above field.
Such soil easily dries out. It ...lacks the elements necessary for plant growth.
Digitized by Google AGRICULTURAL BOOKLETS 67 Figure 44. Field of corn in five-year rotation. Average, 68 bushels per acre.
conditions should exist while the plant is grow- ing. Otherwise plant food is lost by washing.
(3) To increase yields — (a) Crops actually larger under crop rotation.
(4) To maintain soil fertility — (a) Some European soils, cropped for more than a thousand years under rota- tion, better than virgin soil.
2. Theories of Rotation — (1) Toxic-Poi- sons produced by Rgure 45.
What to read after Industrial Booklets?
You can find similar books in the "Read Also" column, or choose other free books by Andrew Ezra Pickard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Digitized by Google 66 INDUSTRIAL BOOKLETS Figure 42. Field continuously in corn for fourteen years.
Average 27 bushels per acre.
1. Need of Rotation — (1) Exhaustion of soils — (a) In New England — Character of soil.
(b) In Virginia — Tobacco raising.
(c) In the West — Grain growing.
(2) To decom- pose fertilizers — (a) How rotation helps.
(b) Decom- position can take place only with heat, air and moisture. These Figure 43. Sample of soil taken from above field.
Such soil easily dries out. It ...lacks the elements necessary for plant growth.
Digitized by Google AGRICULTURAL BOOKLETS 67 Figure 44. Field of corn in five-year rotation. Average, 68 bushels per acre.
conditions should exist while the plant is grow- ing. Otherwise plant food is lost by washing.
(3) To increase yields — (a) Crops actually larger under crop rotation.
(4) To maintain soil fertility — (a) Some European soils, cropped for more than a thousand years under rota- tion, better than virgin soil.
2. Theories of Rotation — (1) Toxic-Poi- sons produced by Rgure 45.
What to read after Industrial Booklets?
You can find similar books in the "Read Also" column, or choose other free books by Andrew Ezra Pickard to read onlineMoreLess
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