【Objective】Iron deficiency chlorosis is still causing huge losses to crop yield and quality in calcareous soils. The correction methods using iron fertilizer include soil application, spraying, injection and so on, but there are still some problems. Therefore, exploring new ways of the iron fertilization to improve apple iron nutrition is needed.【Methods】The container for holding iron fertilizer solution was a tank made of bricks. The main pipe was a PVC pipe, and the branch pipes were made from PE. The sof...