The Origin And Nature of Soils
The Origin And Nature of Soils
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water there must have been a relatively great rainfall in this region now arid. The valleys which at present are the seat of streams only daring the brief rainy season were then occupied by large and permanent rivers, so the soil generally must have been the seat of luxuriant for- ests. The result of these variations is that the existing detrital deposits of that region are in i)art at least derived from a time when soil-producing agents were more active than at present. It seems very doubtful ...if the existing soils of this area could have been formed in the conditions which now prevail.
The insufficiently leached soils of the arid region shade off indistinctly into the better watered soils which surround them. Sometimes, indeed, where the region is far too arid to permit the growth of forests or the use of the land for tillage, but where it is of an open texture, the rainy season being characterized by a brief but abundant downfall of water, the leaching process, though limited in duration to about a month, is sufficient to prevent the soil from retaining an excess of alkaline mate- rial.
What to read after The Origin And Nature of Soils?
You can find similar books in the "Read Also" column, or choose other free books by Shaler Nathaniel Southgate to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
water there must have been a relatively great rainfall in this region now arid. The valleys which at present are the seat of streams only daring the brief rainy season were then occupied by large and permanent rivers, so the soil generally must have been the seat of luxuriant for- ests. The result of these variations is that the existing detrital deposits of that region are in i)art at least derived from a time when soil-producing agents were more active than at present. It seems very doubtful ...if the existing soils of this area could have been formed in the conditions which now prevail.
The insufficiently leached soils of the arid region shade off indistinctly into the better watered soils which surround them. Sometimes, indeed, where the region is far too arid to permit the growth of forests or the use of the land for tillage, but where it is of an open texture, the rainy season being characterized by a brief but abundant downfall of water, the leaching process, though limited in duration to about a month, is sufficient to prevent the soil from retaining an excess of alkaline mate- rial.
What to read after The Origin And Nature of Soils?
You can find similar books in the "Read Also" column, or choose other free books by Shaler Nathaniel Southgate to read onlineMoreLess
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