ROTO Mix, as soil restoration and culture soil, is the perfect soil solution in agricultural and horticultural fields for professional and home use. ROTO mix is a clean and safe green technology certified product, specialized in reducing GHGs and heavy metals helping stabilize ecological quality for a long time using plant symbiotic bacteria. In addition, ROTO Mix has a function of improving soil quality including physical, chemical, and biological properties of soil.

4EN Inc. received excellent evaluation for conducting the advanced production technology project of organic fertilizers applying biochar from 2015 to 2018. In 2018, 4EN developed a new fertilizer using coffee grounds from Starbucks and delivered to Pyeongtaek Farming ASsociation and Jeju Olle Road. In 2020, 4EN is conducting a folow-up project from the Ministry of Agriculture and Forestry for commercializing organic fertilizers containing biochar and coffee ground.

Prevalent soil analysis and diagnosis is cost ineffective and takes long, making it easy to miss the time of fertilizing treatment. 4EN is developing an APP with soil analysis kit, fertilization prescription, and fertilizer recommendation for the expansion of domestic precision agricultural technology, limited to greenhouse cultivation.