Irrigation And Drainage Principles And Practice of Their Cultural Phases
Irrigation And Drainage Principles And Practice of Their Cultural Phases
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The river Nile, during the time of the rainy season of mountainous Abyssinia, comes loaded with sedi- ment constituting 6-7T of the volume of the water; and this, under the old system of the Pharoahs of basin irrigation, which permitted the rich mud to col- lect on the fields, kept them fertile for thousands of years, and they are so today; whereas in Lower Egypt, where the old practice has been abandoned in recent years for an "improved" system, which does not per- mit the utilization of the r...ich Nile mud, the fields are fast deteriorating in fertility, although only half a century has passed.
The Durance, in France, is famous for its fertile waters, and they carry at the ordinary maximum -gV of their weight of sediment, or nearly 1.9 pounds per cubic foot, equal to 82,464 pounds per each acre-foot of water. In rare cases the sediment of this stream rises to iV of the water by weight, and the average proportion for nine j'ears has been found to be tsT.
When such waters are used year after year on poor lands, the improvement becomes very great, while on the better lands a high and permanent degree of fer- tility is maintained indefinitely, with heavy yields per acre as the result.
What to read after Irrigation And Drainage Principles And Practice of Their Cultural Phases?
You can find similar books in the "Read Also" column, or choose other free books by King, F. H. (Franklin Hiram), 1848-1911 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The river Nile, during the time of the rainy season of mountainous Abyssinia, comes loaded with sedi- ment constituting 6-7T of the volume of the water; and this, under the old system of the Pharoahs of basin irrigation, which permitted the rich mud to col- lect on the fields, kept them fertile for thousands of years, and they are so today; whereas in Lower Egypt, where the old practice has been abandoned in recent years for an "improved" system, which does not per- mit the utilization of the r...ich Nile mud, the fields are fast deteriorating in fertility, although only half a century has passed.
The Durance, in France, is famous for its fertile waters, and they carry at the ordinary maximum -gV of their weight of sediment, or nearly 1.9 pounds per cubic foot, equal to 82,464 pounds per each acre-foot of water. In rare cases the sediment of this stream rises to iV of the water by weight, and the average proportion for nine j'ears has been found to be tsT.
When such waters are used year after year on poor lands, the improvement becomes very great, while on the better lands a high and permanent degree of fer- tility is maintained indefinitely, with heavy yields per acre as the result.
What to read after Irrigation And Drainage Principles And Practice of Their Cultural Phases?
You can find similar books in the "Read Also" column, or choose other free books by King, F. H. (Franklin Hiram), 1848-1911 to read onlineMoreLess
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