Catechism of Agricultural Chemistry And Geology
Catechism of Agricultural Chemistry And Geology
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A. Yes, if it contain a very large proportion of some 42 CATECHISM OF AGRICnLTURAI, one, such as oxide of iron, which in great quantity is in- jurious to the soil. Q. How would you improve a soil oj this kind?
A. I would thorough-drain and subsoil it, that the rains might sink through it and wash out the injurious matter, and I would lime it if it required lime. Q. May a soil which is naturally fertile be rendered barren by continued cropping ?
A. Yes, if the same kind of cropping be carried on... for a long time, the land will gradually become less and less productive. Q. Give me an example.
A. If the same field be cropped year after year with wheat or oats, it will at last become unable to grow either of these crops. Q. Why is this 1 A Because these crops draw certain substances from (he soil in great abundance, — and after a number of years the soil cannot furnish these substances in suffi- cient quantity.
Q. What substances does grain especially draw from the soil ?
A. The seed of our grain crops especially exhausts the soil o{ phosphoric acid, and o{ magnesia.
What to read after Catechism of Agricultural Chemistry And Geology?
You can find similar books in the "Read Also" column, or choose other free books by James Fw James Finley Weir Johnston to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
A. Yes, if it contain a very large proportion of some 42 CATECHISM OF AGRICnLTURAI, one, such as oxide of iron, which in great quantity is in- jurious to the soil. Q. How would you improve a soil oj this kind?
A. I would thorough-drain and subsoil it, that the rains might sink through it and wash out the injurious matter, and I would lime it if it required lime. Q. May a soil which is naturally fertile be rendered barren by continued cropping ?
A. Yes, if the same kind of cropping be carried on... for a long time, the land will gradually become less and less productive. Q. Give me an example.
A. If the same field be cropped year after year with wheat or oats, it will at last become unable to grow either of these crops. Q. Why is this 1 A Because these crops draw certain substances from (he soil in great abundance, — and after a number of years the soil cannot furnish these substances in suffi- cient quantity.
Q. What substances does grain especially draw from the soil ?
A. The seed of our grain crops especially exhausts the soil o{ phosphoric acid, and o{ magnesia.
What to read after Catechism of Agricultural Chemistry And Geology?
You can find similar books in the "Read Also" column, or choose other free books by James Fw James Finley Weir Johnston to read onlineMoreLess
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