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| Dip coating method having intermediate bead drying step |
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| Process for biological production of organic acids |
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| Extraction of poly(.beta.-hydroxy butyric acid) |
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| Colorless transparent polyimide shaped article and process for producing the same |
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| Production of absorbents |
| We claim: 1. A process for the production of an absorbent based on a synthetic resin which ... |
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Soil conditioners
| Details |
Inventors: Higa, Teruo;
Assignee: Saken Corporation (both of, JP); Corporation Limited Rioko (both of, JP)
Primary Examiner: Lander; Ferris H.
Assistant Examiner:
Attorney, Agent or Firm: Nixon & Vanderhye
The soil conditioner of this invention is basically composed of 4 to 4.75 parts by weight of coal ash, 4 to 4.75 parts by weight of slag, and 0.5 to 2 parts by weight of zeolite, and is useful for the overall improvement of soil including not only chemical and physical conditioning of the soil but also improvement of its ecological system. In addition to the aforesaid ingredients, this soil conditioner may contain a microorganism having the function of competing with the harmful microorganisms present in the soil or utilizing them as nutrient sources to eliminate the detrimental effects thereof, thereby inducing the propagation of useful microorganisms in the rhizosphere of the desired crop and promoting the growth of the crop, as well as 0.2 to 2% by weight of molasses based on the total weight of the coal ash, slag and zeolite. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The soil conditioner of the present invention comprises 4 to 4.
75 parts by weight of coal ash, 4 to 4.
75 parts by weight of slag, and 0.
5 to 2 parts by weight of zeolite.
Coal ash for use in the present invention is rich in boron and potassium, while slag is rich in calcium and magnesium, but poor in boron and potassium.
Thus, a combination of them can provide a good balance of inorganic fertilizer elements.
However, when used alone, this combination fails to overcome the disadvantage of tending to cause alkali damage, hardening the soil owing to its hydraulic nature, and having poor fertilizer-retaining power.
Nevertheless, the soil conditioner further containing 0.
5 to 2% by weight of zeolite does not cause any alkali damage even when it is amply applied to a soil, and can maintain the alkalinity of the soil for a long period of time.
Moreover, in contrast to vermiculite as used in Japanese Patent Laid-Open No.
40723/'80, zeolite has not only high ion-exchange capacity, but also the beneficial function of decomposing or adsorbing harmful substances (including ethylene and other hydrocarbons detrimental to crops, hydrocarbons and hydrogen sulfide which promote the propagation of harmful microorganisms, and the like) and thereby minimizing the detrimental effects thereof.
The coal ash and the slag are preferably used in a weight ratio of 1:0.
5-2 and more preferably in a weight ratio of approximately 1:1.
As the coal ash, there may be used any finely powdered coal ash that is being commonly used in the field of soil conditioners and the like.
As the slag, there may be used blast furnace slag, converter slag or electric furnace slag.
However, blast furnace slag is preferred from the viewpoint of its composition.
The slag is preferably in the form of fine granules, and it is preferable to use granulated slag having a particle diameter of the order of 0.
2 to 2 mm.
The zeolite is preferably in powder form.
If the amount of zeolite added is less than 0
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Molecular Biology 
