Definition and Uses of Organic Fertilizer
Organic fertilizer is a fertilizers that is made up of the rest of living things, such as weathering the remains of plants, animals, and humans. Organic fertilizers can be solid or liquid that can be used to improve the physical, chemical, and biological properties of soil. Organic fertilizers generally contain more organic matter than its nutrient content.
The formation process of Organic Fertilizer
In soil, the organisms are decomposers both macro and micro. Organic fertilizers are formed due to weather cooperation with the decomposing organisms and human treatment. Residual organic material was destroyed by organisms and elements tied into the compound decomposes. The compound is soluble in water so as to facilitate absorption by plant roots. Macro-organisms play a role in transferring residual organic material from coarse to more subtle forms. While microorganisms play a role in the decomposition of organic matter into nutrients that are easily absorbed into the plant after the compound. Some important microorganisms, among others, algae, fungi, actinomycetes, and bacteria.
Function and Role of Organic Fertilizer
- One-forming soil is organic matter, so the addition of organic matter to the soil is very important. Organic fertilizer positive effect on plants.
- With the aid of microorganisms in the soil organic material will turn into humus. Humus is the glue to the soil grains while forming a clot.
- As a result, the composition of the soil will be better against the destroyer forces from the outside, such as water flow (erosion).
- Addition of organic fertilizer will add nutrients even in small quantities.
- The addition of nutrients, humus, and organic material in soil is residual effect, ie an effect in the long run.
- Organic fertilizer leads to improved soil structure. So that the physical and chemical properties of the soil come repaired.
- Organic fertilizer on sandy soil resulted in increased soil holding capacity.
- Organic fertilizer in clay soil will be light, be a high water holding capacity, soil holding capacity of the nutrient increases, as well as soil drainage and air system can be improved. good air flow with sufficient water content will lead to more stable soil temperature and water flow and air flow better ground.
- Biological properties of the soil can be improved, so that the mechanism becomes living microorganisms.
- Some experts say that the organic fertilizer will increase the population of natural enemies that will suppress the activity of pathogenic saprophytic pathogens.
The weakness of Organic Fertilizer
There are some disadvantages of the use of organic fertilizers :
- Organic fertilizers, especially animal manure, they often contain grains weeds. Grains in livestock feed will not be digested so that it can interfere with plant growth.
- Organic fertilizers are often carriers of factor pest because they contain insect larvae or eggs so that the plant can be attacked.
- The content of nutrients in organic fertilizers is difficult to predict
- Organic fertilizers nutrient content is much lower than inorganic fertilizers so needed much higher doses. As a result the cost of transportation, warehouse, and labor increases.
- Plant responses to organic fertilizers is slower, because organic fertilizers is a slow release.
Application of the results of biotechnology, such as microbial fertilizers, is rarely used. Thus increasing the number of microorganisms in the soil is less than optimal.