JPS6140889A - Soil application material enriched with nitrohumic acid by treating compost or like with nitric acid and manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (1) JLI! J ■ The present invention uses compost, manure, municipal waste compost, etc., which are turned into humus by fermentation to form plant acids, some of which are oxidized to nitrofuminic acid.The artificial soil organic matter is pulverized and treated with nitric acid to produce nitrofumic acid. Basic agent (A) used as a special fertilizer or soil improvement material with the main purpose of increasing the base replacement capacity of soil by significantly enriching it and applying it alone to the soil; In addition, to promote agglomeration and/or increase soluble silicic acid content,
Quarry topsoil containing a large amount of clay minerals and at least one auxiliary material (A and B) selected from the group of sieved or gravity-sorted biotite powder [humus and other useful minerals to the soil,
This invention relates to nitrofumic acid mixed soil application materials used as special fertilizers and soil conditioners, and methods for producing them.

In Japanese agriculture, before the development of modern industry, especially the chemical industry related to agriculture such as fertilizers, pesticides, and herbicides, fertilizers used were bottom manure, well-accumulated and fermented compost, and manure. It depended on etc. If there is a concern that the soil's productivity for a particular crop may decline due to continuous cropping, etc., crop rotation may be used.
Alternatively, they used the natural soil that they had learned through many years of experience to use as supplementary soil, improving the soil and reaping the fruits of farming. ``Land with high soil fertility'' has traditionally meant land that can produce high yields even without the use of fertilizers. In modern agriculture, where large amounts of synthetic fertilizers are used and high yields are the goal, this meaning has changed, and soils that are unlikely to suffer from fertilization problems even with heavy use of fertilizers are considered "highly fertilized soils", that is, soils with high fertilizer retention capacity. It came to be considered a large piece of land.

As a result of research into the relationship between soil and the growth of crops or plants, it has been found that the fertilizing capacity of soil is determined by the base substitution capacity of the soil. To put it simply, the base substitution capacity of soil is due to the fact that soil particles are negatively charged (-).
Ca+), magnesium CMg'').

It quantitatively indicates the ability to bind and hold fertilizer components as positively charged bases such as potassium (K'') and sodium (Na4t), Milligsim equivalents per gram (me
), and the larger this value, the greater the ability to bind a large amount of cations, ie, fertilizer components such as nitrogen (N), phosphorus (P), and potassium (K), and the stronger the fertilizer retention ability. Therefore, soil with a large base substitution capacity binds and retains fertilizer components, prevents them from being washed away, and supplies the bound fertilizer components to crops.

Soil that can grow crops is broadly classified □
This will remove montmorillonite and other clay minerals, which are rare in the soil of Japan but are representative of excellent clay minerals worldwide, as well as organic matter components that remain undecomposed in the remains of plants, animals, microorganisms, etc. It is composed of both the humus it contains. Therefore, the base substitution capacity of soil is influenced by the type and amount of clay minerals and the amount of humus in the soil.

Soil that is suitable for crop growth in its natural state is composed of clay minerals and humus, both of which have a large base substitution capacity and, if both are contained appropriately, have sufficient agglomeration properties, and have good water retention, water permeability, and air permeability. Become a balanced state. Therefore, since it retains fertilizer components even in its natural state, it is possible to obtain a sufficient yield of crops just by clearing the land and cultivating it as is, and by applying fertilizer, the fertilizer components are retained and supplied to crops in succession. By doing so, high yields can be achieved.

In agriculture before modernization, there was no knowledge of the relationship between base substitution capacity, but based on many years of experience, if humus was thought to be insufficient, it was necessary to supplement it with sufficiently mature compost or manure. When clay minerals are insufficient, base replacement capacity and agglomeration properties have been adjusted empirically by adding soil with a high clay content from outside the field. The spread of chemical fertilizers due to the development of the synthetic chemical industry, combined with the mechanization of agriculture especially after World War II, led to a shift to labor-saving agriculture, which led to the use of compost, manure, etc., which produced unpleasant odors, filth, and discomfort. Moreover, the use of organic humus, which takes up a large volume, was avoided. On the other hand, self-sufficiency of compost and manure itself is no longer considered as it requires labor and long-term accumulation and fermentation, and is inefficient, so synthetic fertilizers and pesticides are used exclusively, and agricultural machinery and greenhouse cultivation are used to increase yields. As a result of the shift to intensive agriculture, which aims to improve agricultural production, the yield of crops has increased, but this has also led to an increase in physiological disorders and pest damage to vegetables and grains due to inappropriate fertilization.

This phenomenon was found to be due to deficiencies in soil management and fertilization, including the concentration of inorganic fertilizer in the soil due to excessive application of inorganic fertilizer and the resulting decrease in fertilizer holding capacity, and the increase in fertilizer and soil due to mechanization. Many deficiencies were pointed out, such as insufficient mixing of soil, and improvements were requested, and in May 1981, the Soil Fertility Improvement Law was enacted.

Our country is in a subtropical climate zone, and there is a lot of rainfall, which causes a lot of bases such as lime and magnesium to be washed away.However, in paddy rice cultivation, even if salts and bases are washed away by rainwater, the fertilizer components are replenished through water by fertilization the following year. Due to this repeated cycle, there was less problem of excessive accumulation of fertilizer.

On the other hand, in upland farming, the degree of leaching of fertilizer components is lower than in paddy fields, and they gradually accumulate in the soil, but these points are not recognized and fertilizers are repeatedly applied at the same amount year after year based on the concept of paddy rice cultivation. It is said that this resulted in excessive fertilization, leading to a collapse in soil productivity. In addition, excessive fertilization applied to soil whose base replacement capacity has decreased and its fertilizing capacity has decreased will run off and enter the groundwater system, eventually flowing into rivers and causing water pollution not only in the area but also downstream. It has also become an environmental problem.

Fully ripened compost is extremely effective for soil improvement as it increases the amount of base replacement in the soil when it is incorporated into the soil.
Due to a lack of awareness about compost itself, many farmers sell straw that has not matured enough after pouring urine from livestock barns and pastures as compost or manure, and many farmers do not consider it to be effective compost. Because of this belief, rather than being improved, the soil becomes over-sodium due to the accumulation of salts from immature manure, and coarse organic matter such as immature straw and sawdust, which has a high carbon content and high C/N ratio, becomes When introduced, nitrogen was trapped in the soil, causing problems such as nitrogen starvation.

These problems can be corrected if the government and agricultural organizations provide guidance to farmers and spread the proper method of composting, but compost and manure themselves are foul-smelling, unclean, and require a large volume to produce. In addition to having factors that pose obstacles to transportation and use,
Coupled with the labor shortage due to changes in the human composition of agriculture, this is also due to the fact that even if people want to make compost, there is currently a lack of labor and a lack of supply in terms of quantity.

Another factor is that in order to produce compost, a large amount of livestock urine is used, and a large area is required for rotting.
Due to the fact that it emits a foul odor, there are restrictions on environmental hygiene, and there is little prospect of obtaining enough supply to meet demand.

However, the present invention solves a problem in the prior art in terms of the quality of compost, manure, etc., that is, their inherent nature is that they have low base substitution capacity due to low humic acids and nitrofuminic acids, requiring large amounts of application. In addition, if the degree of rot is insufficient, the base replacement capacity will further decrease, and harmful microorganisms and salts (sodium and chlorine from the food bowl) will be brought in, reducing the soil's ability to retain nutrients. This problem has caused a shortage of supply, and it is also avoided by farmers because it feels unclean and smells bad, and requires large amounts of transportation and large amounts of fertilizer.Furthermore, inorganic fertilizer components due to excessive fertilization are washed away, causing damage to the groundwater system. The purpose of this project is to solve problems such as problems that are causing water pollution in rivers and downstream rivers, which is expected to continue to spread, and problems related to the treatment of large amounts of excreted urine in livestock industries such as pig farming and cattle farming. be.

Therefore, the first object of the present invention is to provide compost that has matured to a certain extent,
Using manure and dungpost as raw materials, it is dried, crushed, and treated with nitric acid to ripen it, and a part of the humic acid is changed into nitrofuminic acid by the nitrification effect of humic acid and ammonia produced by fermentation. An object of the present invention is to further provide a nitrofumic acid-enriched special fertilizer and soil improvement material (hereinafter referred to as basic material A for soil) that is significantly enriched with nitrofumic acid such as compost and manure. Another purpose of this soil material is to increase the soil's inorganic base replacement capacity by adding clay mineral-containing topsoil (
Auxiliary material B) and biotite layer grains (Auxiliary material C)
) By incorporating at least one selected from the group consisting of The aim is to provide soil materials that can be used.

The third object of the present invention is to provide a method for producing a chemical nitrofumic acid-enriched soil material using the above-mentioned compost as a raw material, and to solve the problem of urine disposal by using excreted urine of livestock as a diluent for nitric acid during production. It is to contribute to

(2) Means for solving the problem The present invention is based on the present invention, in which a part of the humic acid in nutrient humus such as compost, manure, city or sludge compost is converted into nitrification of organic compounds including human waste and nitrate. We focused on the fact that the humic acid was converted into nitrofumic acid by treating it with industrial nitric acid, which oxidized the humic acid, increased the degree of humification, and changed it to nitrofumic acid, significantly increasing the overall nitrofumic acid content. It is based on the idea that it can be enriched.

Humic acid fertilizer is used as a material to replenish soil humus, which is one of the factors responsible for soil fertility.

These products use natural humus such as lignite and brown coal as raw materials and oxidize them to enrich humic acids.Generally, a method using nitric acid as the oxidizing agent is used, and the produced humic acid is called nitrohumic acid. Fertilizers that have been neutralized by adding , potassium, magnesia, etc. are called humic acid fertilizers and are used.

Compost and manure are thought to be complete organic fertilizers or soil improvement humic acidic materials made from sawdust, straw, etc. as starting materials, piled up and fermented, and to date, compost and manure have been used for further industrial purposes. No attempt was made to enrich it by oxidation with acids. In the present invention, compost and manure are regarded as intermediate products with a low degree of humus, and are further treated with nitric acid to increase the content of nido-rhumic acid and enrich the nitrohumic acid.
It is a humic acid fertilizer or soil improvement material (hereinafter both are referred to as humic material for soil), and the volume is reduced by turning it into the essence of concentrated and powdered compost or manure. , which solves all the various problems caused by the prior art.

Compost and manure are considered to be nutritional humus when fully ripened and contain a considerable amount of humic acids, and those to which livestock excrement has been added contain ammonia and nitrogen-containing organic compounds. As a result of nitrification, a portion of humic acid is converted to nitrofumic acid, so if compost or manure is used as a starting material for nitrohumic oxidation with nitric acid, the conditions for enriching nitrofumic acid can be met. I judged it to be quite advantageous.

Although there are different theories regarding nitrofumic acid and soil humic acid, there is no dispute that they are complex polymeric compounds centered on aromatic rings, and the air-dried powder is reddish brown to blackish brown in color. It is a fixed form.

When the soluble part extracted with alkali is made acidic, nitrofumic acid is separated into a precipitate of an insoluble humic acid group fraction and a solution of a fulvic acid-acetic acid fraction.

1gr of nitrofumic acid has a base displacement capacity of 4-5rse
, and nitrofumic acid itself has a base displacement capacity of 10
0gr, 400-500 milligrams (400-50
This corresponds to soil having 0 me) equivalent, so it is extremely effective in increasing the base substitution capacity. In addition, fulvic acid, which is one fraction of nitrofumic acid, is recognized to have the effect of combining with iron, aluminum, and other metals to form chelate compounds and making poorly soluble compounds easily soluble. If a material enriched with nitrofumic acid can be obtained, it can be used as a fertilizer that has a chelating effect in addition to increasing base substitution capacity, or as a soil conditioner.

Table 1 shows the results of an experiment to determine how much nitrofumic acid can be obtained by treating compost with nitric acid.

l Nitrohumin 2 The compost was used by pulverizing the piled and fermented material. It contained approximately 11% nitrofumic acid before nitric acid treatment. For comparison, the concentration of nitric acid was measured using lignite, which is currently used as a raw material for humic acid materials.
, 1/2N, IN, and 8N, and shows the amount of nitrofumic acid produced (weight 2) after treatment with nitric acid.

Table 2 shows the results of measuring the weight loss rate due to the above treatment. In the case of 8N concentration in Tables 1 and 2, the reaction temperature is 8N.
The temperature was set to 0°C and the mixture was stirred for 5 hours.

From this result, when the concentration is 8N, it is 69.8a%, '
Even at a degree IN, it was enriched to contain 28.45% nitrofumic acid. On the other hand, with lignite, nitrofuminic acid is not produced at 1N, and 77.79% is produced at 80°C with stirring for 5 hours at 8N.
g, and the amount of nitrofumic acid produced is more enriched than compost.

Nido e+7 mi/acid itself is 100gr, 400~50 per unit
The nitrofumic acid enriched product IQOgr obtained by treating 0 manure with 8N nitric acid is 400 mg x O, fiOff = even when a low force value of 400 rye is taken.
It has a base substitution capacity of 242.4 mg, or about 240 me. Neutralize with lime etc. to reduce content to 50%
Then, the base substitution capacity is fig (5 to 50 me), and if it is 15 to 30 me, it is considered to be excellent soil.Also, among the clay minerals that are excellent as soil, clay minerals, which are rare in Japanese soil, are considered to be of good quality worldwide. Even montmorillonite has 60
~120 rse, and 3-15 for kaolinite
It is only about +e.

From the above points, the special fertilizer made by treating compost and manure with nitric acid to enrich it with nitrhumic acid (this is referred to as basic agent A) has a base substitution capacity far greater than that of montmorillonite, which is the most excellent among clay minerals. , 10~ by weight for normal soil
Just by applying IFJ, the base replacement capacity of soil can be increased by 24-38%.
It turns out that it is possible to increase the amount up to me (adding more than that would be excessive).

The nitrofumic acid-enriched special fertilizer obtained in this way can be applied directly to the soil per unit volume, but it is necessary to conduct a soil diagnosis or measure the base replacement capacity in advance and take into account the cultivation depth for the soil. It is necessary to determine the amount added per unit volume. The estimation of fertilizer application is shown below.

When compost etc. is treated with 8N nitric acid (HNO3), the content of nitrofumic acid becomes approximately 8 (H).A neutralizing agent such as stone plate is added to this to make the specific gravity 1.0, and the final nitrofumic acid content of the product is determined. Let's say it's 50%.

This new special fertilizer is 50g- per 10θgr in dry state.
Contains nitrofumic acid. Nitrohumic acid 1gr.

is equivalent to 4 milligram equivalents (+ae) in base substitution capacity, so the new special fertilizer of +oogr is 4+wg x 5
0 = 200 mg (200 mg) of base substitution capacity, and 102 of that volume to the soil to be cultivated.
By simply adding
, per 20 milligram equivalents (20 ms), the addition of 5z can raise it by 10 me.

The amount of soil to be cultivated for one foot of cultivated land (992+a) is 992 m x (12 ts), assuming a cultivation depth of 20 cm.
=-188,4rs3=200wr3 Therefore, the amount of the new special fertilizer of the present invention added is 2Qts in loz, and the price is ¥800,000.
(¥40,000/1 rs), and at 5%, half that amount is 10m, and the price is ¥400,000. If you fertilize with a conventional commercially available nitrofuminum fertilizer, the cost will be twice the above.

Naoki special fertilizer is a negative charge (naga-ti) fertilizer.
positive charge of nitrogen (N), phosphorus (P) and potash (K), which are the three elements of fertilizer applied by
), it prevents runoff due to rainfall, etc., and also helps improve water retention by improving agglomeration due to immature fibers in the compost.

If the clay content in the soil to be applied is insufficient,
It is necessary to replenish clay ingredients.

In such cases, it is extremely inconvenient for the user to separately select and procure clay additives each time they are used, and if the clay additive is not suitable for basic material A, it may be enriched with nitrofumic acid. This will reduce the effectiveness of basic material A.

Therefore, in the present invention, in addition to the basic material A, it is used in advance in combination with the basic material A to exhibit its nitrofumic acid enrichment effect, and by using the basic material A in combination with clay minerals, it is possible to improve the agglomeration properties of both soils. I do.

A clay mineral material suitable for this purpose (referred to as auxiliary material B) was prepared in the form of powder or pellets in a separate bag or blended into the basic material A.

Topsoils such as quarries contain large amounts of clay minerals, which increase the base replacement capacity and reduce the amount of humus that was previously present in the soil and the nitrhumic acid-enriched base material that has been added. In cooperation with A, it forms a complex of humus and clay minerals, improves soil agglomeration, and increases water retention, air permeability, and water permeability.

In addition, basic material A treated with nitric acid is acidic even after denitrification, so it is neutralized with lime, but clay minerals have a pH of 6.5~
7, so it also acts as a neutralizing agent.

In the present invention, in addition to the clay mineral auxiliary material B, biotite powder is used as an auxiliary material C, which is used alone or mixed with the auxiliary material B and added to the base material A. Biotite is called biotite, and has a black luster and exists in the form of scales, and is found in plutonic rocks and gneiss, and is abundant in crystalline layers, especially biotite. An example of the chemical composition under a 0.8 mm sieve of biotite rock, which is an orthosilicate whose main component is silicic acid (S+02), mixed in crushed gravel at a gravel collection site in a land where biotite rock is produced. It is shown below (Table 3).

As mentioned above, silicic acid (S r 02 ) in biotite is about 70%, but the amount absorbed by crops as ear-soluble silicic acid was found to be IH as a result of experiments. This soluble silicic acid has a fertilizing effect (helps strengthen stems), increases lodging resistance, and strengthens resistance to pests and diseases such as potato blast, and is used in general fruit trees, fruit vegetables, and grass crops. It is especially needed for crops of the Cucurbitaceae family.

Taking these points into consideration, in the present invention, biotite rock powder, which has rarely been used as a fertilizer or soil conditioner, is used as an auxiliary material and a neutralizing material C, and is used for the above-mentioned crops that require silicic acid. Targeting fields where auxiliary material B is present, it can be used in the same way as auxiliary material B, either in powder form or as pellets in a separate bag, or blended into basic material A, or blended with auxiliary material B into basic material A.
Supplied in the form of +B+C.

Biotite has a pH of 5.5 to 6, but has a low specific gravity, so it is effective in improving water permeability, water retention, and air permeability, and is useful in reducing the weight of products.

Adhesion 15 The method for producing the basic material A in the nitrofumic acid-enriched soil material of the present invention will be described below with reference to the process diagram of FIG. 1 attached to this application.

As starting materials, we use compost, manure, composted garbage collected separately, etc., but if these materials are not sufficiently ripened, the enrichment rate will not become high even when treated with nitric acid. .

These starting materials are subjected to preliminary treatment such as dehydration and pulverization before being nitrated, but the concentration of the nitric acid used after addition is between 1N and 8N.
Concentrated nitric acid and water are adjusted using a concentration adjusting pulp so that the N content can be adjusted within the range before being added. If necessary, urine excreted from pig farms, nurseries, etc. can be used as a diluent for nitric acid. Next, the composted material powder is placed in a nitric acid treatment tank and treated with nitric acid for 4 to 7 hours while maintaining the temperature at 80°C.

Since the concentration of humic acid in the starting material varies considerably depending on the type and degree of ripeness of the starting material, the end point of the reaction is determined in advance experimentally.

The material treated with nitric acid in this way becomes a humic acid material enriched with nitrofumic acid.

Since nitric acid remains on the surface of the enriched humic acid material, it is neutralized with milk of lime, dried in a fluidized drying oven, etc., to a moisture content of around 101, and granulated as necessary to form pellets. The product is packaged in polyethylene bags or boxes, sealed, and made into a basic material A product, in which case it is labeled as a special fertilizer or soil conditioner. The nitric acid generated from the nitric acid treatment tank is led to the nitric acid adjustment tank to prevent it from dissipating into the outside air, and if necessary, excreted urine from the livestock barn is added as a diluent and recycled for use.

Topsoil from a gravel pit is used as clay mineral auxiliary material B, and biotite powder (under a 0.8 mm sieve) or its specific gravity sorted powder, etc., contained in crushed gravel at a gravel pit in an area where rocks containing biotite exist are used. As auxiliary material C, auxiliary materials B and C are used for basic material A.
Either or both of these may be sold as a set in separate packs or sold alone, or may be mixed in basic material A to form a product.

The present invention involves crushing and drying compost, manure, sludge compost, municipal waste compost, etc., and treating it with nitric acid at a temperature of 80°C or higher to significantly enrich the nitrofumic acid, and then quenching it with lime or the like. It is supplied as powder or pellets, or with clay minerals, biotite powder, etc. added.

Therefore, problems such as transportation in large volumes, fertilization, bad odors, and filthiness, which are the biggest problems with compost, manure, etc., can be solved.

-If we focus on its value as a fertilizer or soil conditioner, the soil material enriched by the chemical conversion of the present invention is better than lignite in terms of improving the base replacement capacity, which is a criterion for determining the fertilizer retention capacity of soil. It is enriched to the point that it corresponds to humic acidic materials that are decomposed with nitric acid to produce nitrofumic acid. Therefore, the soil material of the present invention is a nitrophumic acid-based organic fertilizer or organic soil improvement product in which the humic acids in organic materials such as compost and manure are further enriched by nitrofumi oxidation, and the compost and manure are concentrated and turned into essences. Since it is a material, if applied in an amount appropriate to the soil composition and the type of crops to be cultivated, it will significantly increase the base replacement capacity of the soil, thereby preventing the runoff of effective fertilizer components and increasing the fertilizer retention capacity. It combines with clay minerals in the soil, promotes the formation of a complex of humus and clay minerals, and enhances the agglomeration of the soil through a cooperative action with clay minerals, which balances aeration, water permeability, and water retention. Nisso remains in the soil after being fertilized.
It has the effect of promoting crop growth by binding N), Reno (P), and Potassium (K).

If its effectiveness as a fertilizer or soil conditioner is recognized in this way, the present invention will eliminate the reasons why compost and manure have been avoided by farmers and cultivation facilities due to the difficulties in handling them, as mentioned above. It will be done.

According to the present invention, compost, manure, compost, etc. are used as the main material of the basic material A' of the present invention, but after becoming a product, the nitrophumic acid content is increased to about 6 times fs.
Therefore, the amount added per unit volume of cultivated soil can be about 5 to 1 (H) of the soil volume, and it can be used from production facilities to user-side centralized storage facilities, as well as final users such as farmers and cultivation facilities. The transportation area can be greatly reduced.

In addition, the product is dried, powdered or pelletized, and supplied in compact bags or boxes.
Since it does not have any bad odor or unpleasant feeling, it is easy to handle and has a remarkable effect on reducing labor when applied by the final user due to a significant reduction in the amount of handling.

In terms of raw materials, compost, manure, city waste, etc. are used as starting materials, so sawdust, straw, and city garbage will not be depleted as resources, but rather will be generated as waste, which is expected to increase in the future. is considered essential,
By dividing the area near the source of these substances into blocks and setting up medium or small-scale nitric acid processing plants, organic materials can be recycled as soil materials, which also serves as waste treatment in the area, saving resources and costs. Due to the lower cost, it can be produced at a lower cost than using brown coal or lignite as a raw material.

Even if only the nitrhumic acid-enriched humic acid material, which is the basic material of the present invention, is applied, it increases the base replacement capacity of the soil and combines with existing clay minerals in the soil to form a complex of humus and clay minerals. Although it promotes the formation of aggregate structure, the clay mineral powder added as an auxiliary material (auxiliary material B) improves base substitution capacity and agglomeration properties, and also introduces the effect of soil supplementation. It combines with nitrogen, phosphorus, and potash to play a major role in preventing runoff. Furthermore, 1 biotite powder (auxiliary agent C) contains 112 or more soluble silicic acid (S+02), so it can be applied to grasses, fruit trees, fruit vegetables, cucurbits, etc., which are typical silicic acid plants. Strengthens the stem and improves lodging resistance. Nitrohumic acid also forms a chelate compound with metals in the soil together with fulvic acid and becomes water-soluble.

In addition to the above-mentioned effects, the present invention not only increases fertilizer retention capacity by improving group substitution capacity and agglomeration properties, but also helps improve hydraulic power, eliminating the need for large amounts of inorganic fertilizers and eliminating the need for excessive fertilization. Even in the case of soil, runoff of fertilizer can be prevented or reduced. This is not only a benefit for cultivators in the soil, such as saving fertilizer and increasing yields, but also concerns about domestic water supply due to contamination of groundwater in the area due to runoff fertilizer flowing into the groundwater system, and even more serious problems at present. This can also be useful in solving the problem of water pollution in downstream rivers, which is becoming a problem.

In this way, the present invention can achieve a large number of effects at the same time, so it can improve the fertilizer effect, that is, improve the quality and quantity of agricultural products, and can also be used in many fields such as soil improvement, agricultural improvement, waste treatment, and water quality conservation. .

[Brief explanation of the drawing]

FIG. 1 is a process chart showing the manufacturing process of the nitrofumic acid soil material of the present invention.

Claims (3)

[Claims] (1) Oxidize humic acidic materials such as compost, manure, and compost with nitric acid to reduce the content of nitrofumic acid from 25 to 75.
A soil application material that is enriched by weight percent and used as a special fertilizer material or soil improvement material to increase the base replacement capacity of the soil to be cultivated and improve its agglomeration. (2) In the soil application material according to claim (1): the soil application material further includes topsoil powder from a crushed stone collection site and soluble silicic acid content for increasing base replacement capacity and agglomeration properties. A soil application material to which at least one additive consisting of biotite rock powder and biotite rock powder is added to increase the amount of soil. (3) Add nitric acid with a concentration of 1N to 8N to composting materials such as compost, manure, and city compost and oxidize it at a predetermined temperature for 4 hours to enrich nitrofumic acid; neutralize excess nitric acid. The concentration of nitrofumic acid after neutralization with
A method for manufacturing a soil application material containing ~50% by weight.