Abstract

Nugroho Widiasmadi

The objective of this analysis improvement of soil infiltration rate on Humus agroland with involve biofertilizer MA-11 on the Biosoildam . As a control is original soil without microbial activity triggered. The research was carried out on January to July 2019 at area of shallot agroland in Ngawi Districts. The research was use double ring infiltrometer to measure soil infiltration with three replication on each distance from Biohole and use electrolit conductivity meter (EC) to measure soil fertility by salt ion consentration and soil acidity. The measurement was done in every five minute and observtian periode every fifteen days along forty five days. The result of research show that the highest of infiltration rate, infiltration capacity , fertility & acidity was happened on soil with involve Biofertilizer MA-11. The infiltration rate shows a constant value at a level of 80 to 120 cm / hour which is achieved after the 30th day. Meanwhile, the EC value in stable conditions is achieved on the 30th day with a value between 950 - 1200 uS / cm. So that the activity of biological agents on humus soil with infiltration levels will be optimal on the 30th day.