Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 2, 2025
In a general way, it is true that opening the surface of the ground before the rains, reduces the run-off and loss of moisture, but whether there would be any loss of moisture by run-off or not depends upon the slope of the land and also upon the way in which the rain comes, and the total amount of moisture which is available for the season. Sub-varieties of California Barley.
Because these deposits are porous the rain that falls upon them and the run-off that reaches them from the mountains sinks into them, and the valleys in which they lie are exceptionally arid. These deposits, however, form huge reservoirs in which the water is stored and in which, to the limit of the capacity of the reservoirs, it is protected from evaporation.
The stealing of soil by erosion occurs where run-off waters are not obstructed by forest growth. Silt, sand, and every other kind of soil are swept from their natural positions and spritted away by the foaming waters as they surge down the steep slopes. The stream or river which is flooded by these rushing waters roars down its narrow channel, tearing loose and undermining the jutting banks.
A number of the streams of the semi-arid lands of the West do not discharge more than five per cent of the rainfall. Other things being equal, which will afford the larger proportion of run-off, a region underlain with granite rock or with coarse sandstone? grass land or forest? steep slopes or level land? a well-drained region or one abounding in marshes and ponds? frozen or unfrozen ground?
We are not aware that such an experiment has been made with the more recently used arsenates which can be used with a much higher amount of arsenic to the gallon because they do not injure the foliage to determine whether the herbage below would be poisonous or not. Presumably not, because modern spraying does not admit as much loss from run-off as was the case with old Spraying methods.
"All right; I'll give you a job," he returned good-naturedly. "Meantime, let's eat that lunch you packed up here." In a branch of the creek which flowed down through the basin. Bill had found plentiful colors as soon as the first big run-off of water had fallen.
"Just as well his watch did get the run-off. Now Dick Prescott won't be hauling his old timepiece out every two minutes in school to see what time it is." Dick reached home somewhat out of breath. "Who's been chasing you?" demanded Mr. Prescott, snatching up a cane that stood in the corner of the parlor.
The run-off is controlled to some extent and may be brought under almost as complete control as may be desired. As much as the water of five or six Mississippis, or a little more than half of our supply, is evaporated to moisten and temper the air, to fall as rain or snow, or to form dews.
In a denuded district no natural obstacles impede the raindrops as they patter to the ground. The surface of the soil is usually hard. It is baked and dried out by the sun. It is not in condition to absorb or retain much of the run-off water, consequently, the rain water finds little to stop it as it swirls down the slopes.
In the Tahoe Reserve the preservation of the forest cover is essential to the holding of snow and rain-fall, preventing rapid run-off, thereby conserving much of what would be waste and destructive flood-water, until it can be used for irrigation and other beneficial purposes.
Word Of The Day
Others Looking