Portable Screener Soil. 4 Filling in the drilling logs 17 4 Powered by a 10hp diesel engine, the screener can be transported by trailer and towed behind a suitable 44 or jeep 722 3rd Street Portable Topsoil Screener, Portable Screener, Topsoil Screener, Black Dirt Screener, Although portable soil test kits determine pH rapidly, it is not possible to make an