With the advent of drip irrigation how do you fertilize the plant material Now you can fertilize easily efficiently and economically through the drip irrigation system as you irrigate with professional grade ASAE (AE50) award-winning Add-It and Fertilizer Caddy proportioning fertilizer injectors. In addition to dispensing any totally water-soluble fertilizer you can also dispense micro-nutrients and root hormones for healthier plants wetting agents (surfactants) to help breakup compacted soils compost tea to add micro-organisms to the soil and vitamin B-1 when transplanting trees and shrubs. With the many sizes capacities and configurations Add-It and Fertilizer Caddy proportioning fertilizer injectors are available in its easy to see why there are so many applications in the commercial greenhouse golf course and residential areas where they can be utilized. The Add-It fertilizer injector has been featured in Sunset magazine and HGTVs Gardening by the Yard and member tested and recommended by the National Home Gardening Club!