The aim of this study was to obtain the best combination of types and doses of ameliorant materials: dolomite. rock phosphate. and mineral soil to improve the chemical properties of soil which was incubated for one year in peat media in polybag. The research was conducted in May 2015 - April 2016 in the experimental garden in the village of Sijambi. https://pipingrockers.shop/product-category/yohimbe/