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THE EFFECTIVENESS OF THE SOIL IMPROVEMENT FORMULA WITH BIOCHAR IN THE PRODUCTION OF MINI SHALLOT ON THE DRY LAND IN THE EAST LOMBOK DISTRICT a) Research Center for Horticultural and Estate CropsCibinong Science Center, JL. Raya Jakarta Bogor, Cibinong, Bogor, Indonesia Abstract The decline in soil fertility indicated by the degradation of organic matter occurs almost on agricultural land, it is inseparable from the intensification of crop production practices including the provision of chemical fertilizers and the lack of recycling of agricultural waste. Soil composed of thin organic matter impairs plant growth and productivity. In order to prevent the spread of soil damage, soil protection is required, including through the addition of soil improvers. Soil amendment materials can come from a variety of sources, including plant biomass, manure, char from agricultural waste (biochar), and others. This study compared soil amendment formula (Biochar charcoal shells, manure, and plant biomass) in influencing onion mini-bulb yield and dryland quality. Mini bulbs are small bulb bulbs produced as seeds from TSS propagation and are expected to be an innovation to meet the seed shortage. The design used a two-factor factorial randomized block, the first factor was the soil amendment formula (biochar, manure and biomass), the second factor was TSS varieties (Tuk-tuk, Sanren and Trisula). The study was conducted from April to July 2017 in East Lombok Regency on dry land with Inceptisol soil type. The results showed that the use of biochar in the Trisula cultivar produced the highest number of mini-tubers, 4.5 tubers/seed from TSS compared to the cultivars of Sanren (1.8 tubers/seed from TSS) and Tuk- Tuk (1.2 tubers/seed from TSS). The use of biochar improves the soil chemical quality (C-organic, P-available and CEC) on dry soils. Keywords: shallots, mini tubers, biochar, dry land Topic: Agriculture Productivity |
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