The warnings regarding loss by leaching should not be disregarded, however.
The growth prevents the leaching of plant-food, shades the ground, adds nitrogen to the soil, smothers weeds, and produces material that is valuable as feed for livestock or an addition of organic matter to the soil.
The potash is readily available, but the loss from leaching out of the soil is very small.
The manure must be protected from leaching rains, it must be kept moist, and air must be excluded.
Again, if pulverized limestone were used, a very heavy application would bring up the question of coarseness in order that waste by leaching might be escaped.
Manure spread immediately before the sod is broken is less effective, as no leaching of soluble elements into the surface soil occurs before the coarse material is buried in the bottom of the furrow.
The soils of the cold north are protected from leaching during the winter by the action of frost.
The leaching is generally carried out with a strong, medium, and with a weak liquor, in the order given; sometimes there is a preliminary leaching with a weak liquor.
The result is a great destruction of the humus of the soil, and great leaching and washing, especially in the light loams of the hill country of the United States.
If the burning-up of humus and the leaching of the soil could be prevented, there is no reason why a cotton soil should not produce good crops continuously for an indefinite time.
If the weather is rainy and the soil over wet, the food is applied more concentrated, not to lighten the burden but to avoid waste by leaching and over saturation.
It may appear to some that the application of such large volumes of water to fields, especially in countries of heavy rainfall, must result in great loss of plant food through leaching and surface drainage.
Repeatedly, when walking through city streets, we observed such materials quickly and apparently eagerly gathered, to be carefully stored under conditions which ensure small loss from either leaching or unfavorable fermentation.
We may place undue emphasis upon this factor, as other causes are at work, butleaching is a leading source of loss.
The gossans are formed by oxidation and leaching of other minerals from the deposits, leaving limonite or hematite in concentrated masses (see pp.
Another method of approach, employed chiefly on the Mesabi Range, relates to the slumping of the ore layers which results from the leaching of silica during the concentration of the ore.
Failure to recognize the true nature of the concentration of these ores has sometimes led to their erroneous classification as ores derived from the leaching and redeposition of iron from the surrounding rocks.
It is probable that most of the cobalt in these ores will be lost on the installation of a leachingprocess for recovery of the copper.
They lie in depressions in a former sand dune area, and contain large quantities of potash supposedly accumulated by leaching of the ashes resulting from repeated burnings of the grass in the adjacent country.
These conditions made it possible for the oxidizing and leachingsolutions to penetrate very deeply, how deeply is not yet known, but certainly to a depth below the present surface of 2,500 feet.
So far as there has been any noticeable effect on the gold content of the ores, it has been due to the leaching out of other constituents, principally pyrite and other sulphides, leaving the gold present in slightly larger proportions.
The fact that these deposits are almost exclusively residual deposits formed by the leaching of silica has an important bearing on exploration.
Near the surface there may be an increase in silica,--probably due to a reversal of the usual conditions by a slight leaching of alumina, thus concentrating the denser masses of kaolin which have not been decomposed.
If the leachingof the Leadville porphyry has not resulted in the formation of alkaline sulphide solutions, and the ore has come from the porphyry in the condition of carbonate of lead, chloride of silver, etc.
In nearly all these localities we may find evidence not only that the ore deposits have not been derived from the leaching of igneous rocks, but also that they have not come from those of any kind which form the walls of the veins.
Strong arguments against the theory that the leaching of superficial igneous rocks has supplied the materials filling mineral veins, are furnished by the facts observed in the districts where igneous rocks are most prevalent, viz.
The arguments against the theory that mineral veins have been produced by the leaching of superficial igneous rocks are in part the same as those already cited against the general theory of lateral secretion.
In the leaching and rearrangement of the ore bodies, nothing would be more natural than that accumulations in one place should be attended by the formation of cavities elsewhere.
Of course, water should not be supplied so freely as to cause a leaching of the pile.
Manure which has been quickly dried, without fermentation and without leaching by rains, may be worth four or five times as much per ton.
Can it be done by leaching soil from old alfalfa ground, providing it has been plowed up and allowed to stand for a year?
Poultry-manure is liable to as much injury from evaporation and leaching as is any other manure, and equal care should be taken (by the same means) to prevent such loss.
Z] Leached ashes will not supply the place of these, as the leaching has deprived them of their potash.
The subject of leaching is as important in considering the inorganic parts of manures as evaporation is to the organic, while leaching also affects the organic gases, they being absorbed by water in a great degree.
It in part prevents the leachingout of the soluble parts of the ash.
Such extracts only need to be dissolved in warm water in order to make a tan liquor, and the cost and trouble of leaching is avoided.
Vœlcker to convince us that there was great waste in leaving manure exposed to the leaching action of our heavy rains.
It unquestionably prevents the loss of considerable nitric acid from leaching during the winter and early spring.
Whichever method be used, the first essential is the most suitable means of leaching the materials, or extracting the tannin.
Fully as important as any of the differences above outlined are those which depend definitely upon the leaching power of a heavy rainfall.
Conditions of aridity favor strongly the formation of lime, and since there is very little leaching of the soil by rainfall, the lime accumulates in the soil.
It is then placed in leaching vats, with false bottoms for filtration, similar to other leaching plants.
It is thus readily available; in fact, it is too available to be durable if very finely ground; and in humid sections the loss by leaching far exceeds that removed by cropping.
These figures are based on the assumption that the animals are well fed, and that no leaching of the manure is allowed, with gypsum used as a preservative, and good care exercised in all respects.
In many American barnyards much of the manure is lost, partly by leaching and partly by escape of ammonia.
All leaching is then received by the soil, and little is lost, except through the air.
The surface soil should extend to a depth of 6 or 8 inches, and the subsoil should be of such a nature that it will carry off excessive moisture without leaching away the fertilizers applied to the land.
Because it grows only during the warm part of the year and there is no crop on the land to check loss of plant food from leaching and surface wash during the winter.
We noticed that water poured on the sand ran through it very quickly and was apt to be lost by leaching or percolation.
Losses from washing or leaching by rain may be prevented by piling the manure under cover or by hauling it to the field as soon as produced and spreading it on the surface or plowing it under.
LOSS OF SOIL WATER By surface wash By percolation and leaching By evaporation By transpiration How to check these losses 53 VII.
Water may be lost from the soil byleaching through the lower soil.
Because by wasting organic matter it increases the leaching of the lighter soils and the surface washing of the heavier soils.
There will be some loss of nitrogen through leaching and denitrification.
The leachingdrains may safely begin at a distance of even ten feet from the back of the house, requiring for the whole a clear area of only fifty feet by sixty feet.
No form of cesspool, noleaching vault, and no cemented tank, should be allowed under any circumstances.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "leaching" in a variety of sentences. We hope that you will now be able to make sentences using this word.
