Superphosphate may also be employed as a top-dressing and worked into the surface around growing plants with the hoe.
Never mix sulphate of ammonia with basic slag or with lime, but it may be mixed with superphosphate and the potash manures.
Superphosphate sown along the drills with seed has saved spring-sown crops from destruction; and Vaporite, a proprietary article, has also been used with marked success.
Both these fertilisers should be dug into the soil some time before the crop is planted or seed sown--superphosphate at the rate of two to three pounds per square rod; basic slag in larger amount, five to six pounds per square rod.
The resulting mixture is a powder, which is sold as a fertilizer under the name of "superphosphate of lime.
I have very little doubt that there are specific manures for the strawberry, and one of them will probably be found in Baugh’s Rawbone Superphosphate of Lime.
On some of them the superphosphate was scattered on both sides of the row, whence, by repeated hoeing and raking, with the aid of sundry rains, its finer particles found their way to the roots.
Nitrate of soda, Peruvian guano and superphosphate of lime in the form of bones dissolved by sulphuric acid were now added to the list of manures, and the practice of analysing soils became more general.
If you wish to experiment with some of the trees, give them an application of five pounds of superphosphate and two pounds of potash to each tree, properly distributed over the land which it occupies.
The amounts of superphosphate and nitrate which you use would be considered homeopathic treatment by our growers.
Copperas or blue stone, kainite and superphosphate are sometimes used for the same purpose.
The term superphosphate is applied to the phosphates that have been treated with sulphuric acid to make the phosphoric acid available.
But the other is what is called superphosphate of lime, which will dissolve in water; so that the roots of the plants can suck it up: and that is one of the richest of manures.
Oh, I know: you put superphosphate on the grass last year.
Impure chloride of magnesium mixed withsuperphosphate of lime.
Superphosphate of lime and bones are excellent for sugar-beets, and never injure the quality of the crop, like the indiscriminate use of ammoniacal manures.
On light soils, in which potash is often deficient, the judicious use of potash salts has been found serviceable, but only in conjunction with superphosphate and phosphatic guanos.
Finally they are watered with water containing molasses and superphosphateof lime, as recommended by Corenwinder.
The basic slag, kainit, and superphosphate may be also applied at the seasons mentioned, if considered desirable.
A little superphosphate of lime at the rate of four to eight pounds to 30 square yards, would also be useful, applied about March or April.
These nodules and fossils are extensively worked on account of the phosphatic matter they contain, and when ground and converted into superphosphate of lime they furnish a very valuable agricultural manure.
Howard especially denigrated sulfate of ammonia and single superphosphate as earthworm poisons.
Adding lime and superphosphate to that manure made an additional improvement of another 33 percent.
When superphosphate is added to the soil, being soluble in water, it is soon dissolved and carried down by the rain into its pores, and becomes thoroughly mixed with the soil-particles.
In fact, spring-sown crops, as a rule, benefit more from superphosphatethan autumn-sown crops.
Hence superphosphate and manures which contain any appreciable amount of soluble phosphoric acid, such as guano, should only be applied shortly before seed-time.
It has also been used for mixing with superphosphate of lime.
It is soluble in water, and gives to the commercial article known as superphosphate of lime its value.
Further, it must be borne in mind that gypsum is applied to the soil whenever it receives a dressing of superphosphate of lime, as gypsum is one of the products formed by treating insoluble phosphate of lime with sulphuric acid.
With regard to the nature of the phosphatic manure to be applied, superphosphate is to be preferred.
Phosphoric acid, similarly, may exist in a soluble form, as it does in superphosphate of lime, or in an insoluble form, as it does in bones or basic slag.
If it is desired to apply nitrate of soda along with superphosphate of lime, a word of caution is necessary against making the mixture long before it is used.
This would be so if bones were the only source we possessed for the manufacture of superphosphate of lime; but we now have, in the various mineral phosphates, abundant and cheaper sources of this valuable manure.
Superphosphate had a better effect when applied in April than when applied with the seed in June.
For these reasons it will be easily seen that the rate of action of the superphosphate must always be quicker than that of any other form of phosphatic manure.
The use of superphosphatehas greatly extended of late years, and its consumption has increased in a greatly more rapid ratio than that of guano or any other manure.
Calcium superphosphate and acid calcium phosphate very frequently contain arsenic, and as the cheap commercial qualities are often used there is danger in this direction.
They are commonly composed of--in addition to sodium bicarbonate--acid calcium phosphate, calcium superphosphate and calcium sulphate.
Superphosphate contains nitrogen, but not in sufficient degree.
A farmer applied six hundred pounds ofsuperphosphate to a plat of corn- land, and three hundred pounds to an adjacent plat wherein the conditions were the same.
There are some localities where further experiment is required to definitely ascertain the most suitable fertiliser, but in the main superphosphate is the requirement, and practically the only manure used.
In New South Wales the quantity ofsuperphosphate usually used is 56 lbs.
Superphosphate has proved superior to bonedust or basic slag; sulphate of potash has not increased the yield, while nitrogenous fertilisers, such as dried blood or sulphate of ammonia, have proved either useless or harmful.
In South Australia heavier dressings of superphosphate are used than in the other States.
Commonwealth, while usually about the same amount ofsuperphosphate is distributed, 45 to 60 lbs.
It is because you have used superphosphate and bone-dust.
Superphosphate of Lime”--in all cases, made from 200 lbs.
To the market gardener, or to a farmer who manures heavily common turnips drilled in with superphosphate will prove a valuable crop.
The only difference being that one had superphosphate and potash, soda, and magnesia, the year before, while the other had superphosphate alone.
But for corn and potatoes, when planted in hills, the superphosphate must be dropped in the hill by hand, and, as we are almost always hurried at that season of the year, we are impatient at anything which will delay planting even for a day.
We are making manure cheaper than you can sell it to me,” I replied, “and besides, I do not think superphosphate is a good manure for wheat.
Hooker, once sowed, at my suggestion, some sulphate of ammonia and superphosphate on part of a block of nursery trees, and he could not perceive that these manures did any good.
Lawes subsequently, in 1843, applied this to mineral phosphates, using phosphorite, first of all, and the great manufacture of mineral superphosphate then began.
When mixed with superphosphate in varying amount, or if made with steamed and not raw bone, they are generally known under the indefinite name of "bone manure.
Other phosphates imported are Redonda and Alta Vela phosphates, but these consist mainly of phosphate of alumina, and are not used for superphosphate manufacture but for phosphorus production.
Superphosphate is used practically for all crops, including cereals, clover and other leguminous crops.
These are bones treated with oil of vitriol, as insuperphosphate manufacture.
The first impetus to the manufacture of superphosphate was given by Liebig, when he suggested, in 1840, the treatment of bones with oil of vitriol in order to make them act more quickly in the soil.
Algerian and Tunisian phosphates have from 55 to 65% of phosphate of lime, and are very free from iron and alumina, this fitting them especially for superphosphate making.
Mixed with superphosphate, bone meal forms an excellent manure for roots, and obviates the difficulty of using superphosphate on land poor in lime.
The fact that superphosphate itself contains a considerable amount of sulphate of lime renders the special application of gypsum unnecessary, as a rule.
For the cotton crop, superphosphate and nitrate of soda, in the proportion of 3 to 4 hundredweights superphosphate to 1.
In this connection it is interesting to note that a certain proportion of arsenic is frequently present in the superphosphate used as manure.
Experiments carried out by Stoklasa (1898), however, indicate that there is not sufficient arsenic in maximum doses of superphosphate to exercise a toxic action in the field.
Other analyses revealed the presence of the element in cabbage plants (from pots) and turnips (from field), both of which had been manured with superphosphate containing some amount of arsenic.
In view of the known toxicity of arsenical compounds to plant life the question arose as to whether superphosphate manuring would exercise a detrimental influence on account of its arsenic content.
The plants were grown in pots on soil which originally contained a certain amount of the substance, and various combinations of arsenic acid, arsenious acid and superphosphate were added.
Plaster, bone-dust, and superphosphateof lime, are best for humid soils.
Where this is not to be obtained, guano, superphosphate of lime, or bone-dust, may be employed advantageously as a substitute.
Naked cultivation was practiced in the orchard, and fertilizers consisting of fish guano and superphosphate of lime were being applied twice each year in amounts aggregating a cost of twenty-four dollars per acre.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "superphosphate" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: ammonia; compost; dressing; dung; manure; muck; nitrate; nitrogen
