Are humus and humic acid of great practical importance?
The residues, which are insoluble in water, but redissolve in ammonia, have the properties of humic acids.
His theory is that the necessary ingredients of plant-food are absorbed into the plant as humates, or, at any rate, that the medium of this transference is humic acid, and organic acids of a similar nature.
We are well aware that the nitrogen present in the humic matter of the soil is readily nitrifiable.
In such soils humic acids are present and the requisite alkalinity is thus awanting.
There is in this fermentation a large quantity of cold sour humic acid formed, which seriously impairs the value of the manure.
It is highly probable that a certain quantity of potash in the soil may exist in combination with humic and ulmic acids, forming insoluble potassium humates and ulmates.
A theory has been advanced that it is due to the formation of insoluble ulmates and humates, formed by the union of ulmic and humic acids, along with the bases fixed.
The humic acid is first extracted from the peat by means of alkalis, and the hides are treated with this solution, the humic acid being afterwards precipitated in the hides by treatment with some stronger organic or mineral acid.
His peat orhumic acid tannage was patented by him about 1905, and is now worked on a commercial scale.
Both the humic acid and humin are mixtures, and several constituents have been separated; ulmic acid and ulmin, in addition to humic acid and humin, are perhaps the best characterized.
By treating with a dilute acid to remove the bases present, and then acting on the residue with ammonia, a solution is obtained from which a mineral acid precipitates humic acid; the residue from the ammonia extraction is termed humin.
The insoluble woody fibre of the straw is decomposed and converted into humic and ulmic acids.
Alkali dissolves a part of the original brown and black substances, forming solutions of a brown tint (ulmic and humic acids) which sometimes communicate their colour to springs and rivers.
Defn: Pertaining to, or derived from, vegetable mold; as, humic acid.
But the presence of humicand other acids, and the saturation with water and consequently the absence of worms, bacteria, and also of air, make it impossible for plants to grow in a peat-moss.
One is, however, justified in assuming that both the natural tannins and the relatedhumic acids are ester-derivatives of hydroxybenzoic acids.
In fact, the oxidation and consequent removal of these soluble matters (crenic and apocrenic acids,) is likely to proceed more rapidly than they can be produced from the less soluble humic acid of the peat.
This is sustained by the fact that the crenic, apocrenic and humic acids, though often partly uncombined, are never wholly so, but usually occur united in part to various bases, viz.
This solvent separates thehumic and ulmic acids from the undecomposed vegetable fibers.
This deposit, if obtained from light brown peat, is ulmic acid; if from black peat, it is humic acid.
A small portion of nitrogen unites with hydrogen, forming ammonia, which remains combined with the humicand other acids.
In soils that are acid through the accumulation of humic acid nitrification does not go on, and bacterial life is repressed.
Our land cost so much to reclaim for hay, being soaked in humic acid, that we had always to import that commodity at a cost which made more cows than absolutely essential very inadvisable.
We fully intended to erect a kiln, using our refuse for fuel, for the land is loaded with humic acid, and only plants like blueberries, conifers, and a very limited flora flourish on it.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "humic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
