The effect of using biopore on soil fertility in karst area, District of Besuki, Tulungagung Regency

The District of Besuki is one of the regions in Tulungagung Regency which has karst morphology. The karst area is identical to the condition of the land that is infertile. The use of biopore by incorporating organic waste into the biopore hole is expected to add nutrients in the soil so that it can increase soil fertility. This study aims to determine the use of biopore in improving soil fertility in Gambiran, Besole Village, district of Besuki, Tulungagung Regency. This type of research is an experiment. The level of soil fertility was measured by field observations and laboratory trials, such as pH meters, distilled water, and litmus paper. The results showed that the use of biopore could increased soil fertility in karst topographic areas. This is evidenced by a change in the soili.e.1) to turn soil color into dark brown; 2) to turn the texture of the soil into wet, clay, lots of leaf litter; 3) to increase Soil pH into balanced or neutral pH; and 4) to initiate land biota.