Soil Conditions And Plant Growth
Soil Conditions And Plant Growth
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Calcium carbonate is not a permanent constituent of the soil, but changes into the soluble bicarbonate and washes out into the drainage water ; the average loss per acre per annum throughout England and Wales has been estimated at 500 lb., and at Rothamsted on the arable land at 800 to 1000 lb. (118^). The rate of loss is influenced by the treatment, being increased by the use of ammonium sulphate and decreased by dung and by the crop ; it is much less on pasture than on arable land. Repeated a...dditions of calcium carbonate to the soil are, therefore, necessary : indeed chalk and lime are among the oldest 68 SOIL CONDITIONS AND PLANT GROWTH of manures. Soils lying immediately above chalk and limestone are no exceptions and in wet r^ions they may become thoroughly de- calcified.
On chalk soils the percentage of calcium carbonate may rise very high, and then a wholly new set of properties comes in. It is im- possible to draw any exact line showing where these properties begin to appear, but they entirely mask the effects of the silica and silicate particles and obliterate the distinctions between sands, loams, clays.
What to read after Soil Conditions And Plant Growth?
You can find similar books in the "Read Also" column, or choose other free books by Russell, John Edward, 1848- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Calcium carbonate is not a permanent constituent of the soil, but changes into the soluble bicarbonate and washes out into the drainage water ; the average loss per acre per annum throughout England and Wales has been estimated at 500 lb., and at Rothamsted on the arable land at 800 to 1000 lb. (118^). The rate of loss is influenced by the treatment, being increased by the use of ammonium sulphate and decreased by dung and by the crop ; it is much less on pasture than on arable land. Repeated a...dditions of calcium carbonate to the soil are, therefore, necessary : indeed chalk and lime are among the oldest 68 SOIL CONDITIONS AND PLANT GROWTH of manures. Soils lying immediately above chalk and limestone are no exceptions and in wet r^ions they may become thoroughly de- calcified.
On chalk soils the percentage of calcium carbonate may rise very high, and then a wholly new set of properties comes in. It is im- possible to draw any exact line showing where these properties begin to appear, but they entirely mask the effects of the silica and silicate particles and obliterate the distinctions between sands, loams, clays.
What to read after Soil Conditions And Plant Growth?
You can find similar books in the "Read Also" column, or choose other free books by Russell, John Edward, 1848- to read onlineMoreLess
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