Viability of Aspergillus costaricaensis in a coffee husk carrier material and its effect on soil fertility and growth of coffee seedlings

Planting media is an important factor affecting coffee nurseries. Farmers in Wanagiri Village have problems cultivation because they soil with a slightly acidic pH. This affects the availability of phosphorus (P) and potassium (K) soil. P K solubilizing fungi can be used to increase study aimed analyze viability <em>Aspergillus costaricaensis </em>fungi on husk carriers effect <em>A. costaricaensis</em> biofertilizer planting medium growth Arabica seedlings. The method consisted preparation carrier material, test carrier, arabica There were four fertilization treatments, i.e., P1 (organic fertilizer), P2 (100% NPK), P3 fertilizer + biofertilizer), P4 50% NPK). Coffee material maintained during nine weeks storage. number populations that could was log 7.67 (4.7 x 10<sup>7</sup> CFU g<sup>-1</sup>). application combined organic fertilizers (P3) increased pH 7.13, it potentially reduce use NPK fertilizer. Based observed parameters, shown treatment biofertilizers parameters plant height stem circumference