Ag Engineering company's farm and agriculture equipment includes chisel plows, listers, rippers, and hay trailers.The patented Dammer Diker? process is simple but the effect is dramatic. It greatly improves each plant's access to moisture, nutrients, temperature, and oxygen. An inter-row ripper opens up the soil, and a multi-spoke "spider" implants the tillage reservoirs. The spiders are mounted on a common shaft in gangs of at least three spiders timed so that the gang rolls smoothly through the opened soil, alternately implanting the tillage reservoirs.