The role of dolomite and vermicompost in nutrient uptake and production of sweet potato (Ipomoea batatas L) on acid soil

Sweet potato production is limited where it is caused by the lack of nutrients needed by the plant, where most of the sweet potato is planted on acid dry land where liming on the soil is an important activity that is sometimes neglected by farmers. so that the need for the nutrients needed is not fulfilled, so that the production of sweet potatoes is lo, by giving Dolomite and Bio-Vermi can help to increase nutrient uptake and plant production. The purpose of this study was to determine the effectiveness of dolomite and Bio-Vemi in optimizing nutrient absorption in the growth and production of sweet potato (Ipomoea batatas L.). The research was conducted in Aras Kabu Village, Beringi District, Deli Serdang Regency, North Sumatra using a randomized block design (RAK) with two factors and three replications. The first factor is the provision of Dolomite with 3 levels, namely D 0 (without dolomite), D 1 (1.5 ton/ha) and D 2 (3 ton/ha). The second factor is the application of Bio-vermi with 4 levels, namely P 0 (without Bio-vermi), P 1 (100g/plant), P 2 (150g/plant), P 3 (200g/plant). The results showed that the application of dolomite and bio-vermi could increase soil pH, plant length growth and the number of yams planted. The highest increase in pH was found in D 1 (1.5 ton/ha) of 5.57 and P 2 (150g/plant) of 5.53, the longest plant length in P 3 treatment (200g/plant) along 64.31 and D 2 (3 ton/ha) along 64.27, the highest number of planted yams in treatment P 1 (100g/plant) was 5.62. There is a significant interaction with dolomite and biovermi in increasing plant growth and nutrient uptake, with the provision of D 1 (1.5 ton/ha) can increase soil pH and organic matter by 1% in acid soils, so that the longest plant length in treatment D 1 P 3 is 69, 33 this proves that by giving Dolomite and Bio-vermi can help nutrient uptake and growth and production of sweet potato in acid soils.