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The use of fertilizers in the world continues to increase in accordance with the increase of agricultural area, population, rising levels of intensification and more diverse use of fertilizer as an attempt to increase agricultural output. Environmental experts concerned with the use of mineral fertilizers that come from this plant will increase the level of soil pollution that ultimately affect human health.
Based on this growing reason to reduce the use of mineral fertilizers and for making fertilizer factories in the world is reduced or stopped altogether so that people can avoid calamity pollution. Efforts to plant cultivation with organic farming is an attempt to get food without the use of inorganic fertilizers. With this system the plant is expected to be able to live without any input from the outside so that the plant life there is a closed life cycle.
Many good properties of organic fertilizer on soil fertility, among others are:
a. Organic materials in the process of mineralization would release the complete plant nutrients (N, P, K, Ca, Mg, S, and micro-nutrient) in the number of uncertain and relatively small.
b. Can improve soil structure, causing the land to be light to be processed and easily penetrated by roots.
c. More easily cultivated land to land heavy.
d. Increasing the holding power of water (water holding capacity). So that the soil's ability to provide water to more. More soil water humidity maintained.
e. Permeability of the soil the better. Reduce the permeability of coarse-textured soil (sandy), otherwise increase the permeability of the soil is very soft-textured (clay).
f. Increasing KPK (cation exchange capacity) so that the cation binding ability is higher, consequently, if cultivated with high doses of plant nutrients are not easily washed
g. Improve the soil biological life (both higher animals and lower levels) to be better because of the availability of food is more secure.
h. Can enhance prop (capasity buffering) of shocks drastic change soil properties.
i. Mikrobia contain sufficient amounts of a role in the process of decomposition of organic materials.
Meanwhile, the poor nature of the organic fertilizer are:
a. Organic materials which have C / N is high means that there are raw. Immature compost (C / high N) considered harmful, because when given directly into the soil organic matter is attacked by mikrobia (bacteria and fungi) to obtain energy. So mikrobia high population also requires nutrients for plants and the plants reproduce. Nutrients that should be used by the plants used by mikrobia change. In other words mikrobia compete with crops for nutrients that fight there. Hara become unavailable (unavailable) due to change of inorganic compounds into organic compounds mikrobia network, this is called nutrient immobilisasi. Immobilisasi occurrence of plant nutrients and often cause symptoms of deficiency. The more organic raw materials are given to the higher ground to attack the population, the more nutrients are experiencing immobilisasi. However mikrobia later when the dead will experience a immobil nutrient decomposition is transformed into available again. So is the binding immobilasasi nutrients available to not available within a period not too long relative
b. Organic materials derived from municipal waste or industrial waste mikrobia often contain pathogens and heavy metals are a bad influence for plants, animals and humans.  |
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