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Effect of Worm In Soil Fertility

Some physical soil properties terbenahi by earthworm activity is (1) the formation of macropores result of the formation of worm burrows, (2) the creation of soil crumb structure, (3) decrease in soil bulk density, and (4) increasing the shelf life of the water. The formation of an earthworm burrows macro pores lead to the creation of sustainable and stable. These holes facilitate the exchange of air and water infiltration. the speed and the accumulation of infiltration at a given soil worms input is greater than without earthworms.

The water accumulation will be greater if accompanied mulching. Through the movement of earthworms will occur revamp the original soil structure is compact and massive into soil crumb structure. This can be seen by comparing the structures on land not inhabited land inhabited worm with a worm. On land not inhabited worms generally have the following characteristics: (1) soil massive structure, (2) low water retention, (3) high soil bulk density.

In addition to the movement of earthworms, dung which also produces positive influence on some soil physical properties, such as increased shelf life and decrease the weight of the water content of the soil. Increasing the shelf life of the water due to the relatively high clay content is accompanied by a relatively large total pore in the dirt worm when compared to the surrounding soil. Dirt worm contains a higher water from the surrounding soil at the same level of water stress.

The addition of worm excrement can lower soil bulk density of about 7% of the land without their worm dirt. Earthworms are also working with the microbes in the formation of aggregates. It is associated with the presence of organic debris that can not be digested by the worms will completely degraded further by the soil microorganisms. Decomposition by microorganisms or organic compounds formed by microorganisms results will strengthen the formation of crumb structure which is carried out by a worm.

The entry of worms into the ground resulting in changes in soil chemical properties which include (1) increasing the organic matter content, (2) and thus increasing the nutrient content is available, and (3) increasing the cation exchange capacity. This is due to earthworm droppings contain more nutrients and soil organic C of the original.

Table 1.4. Nutrient composition and organic C in earthworm excrement and soil.