Iron is used by the plant in chlorophyll synthesis and is not mobile within the plant. Plants that have a reduced root system and vigor will be more prone to disease activity. The leaves and stems of turfgrass plants have thinner cell walls during rainy weather. This succulent growth, plus higher humidities, makes disease activity more likely. The use of core cultivation can help dry out some waterlogged soils.
Core cultivation increases the surface area which in turn increases evaporation.
This enables oxygen to reach the roots, thereby improving root respiration. There is no need to add iron to most home lawns. Iron uptake will resume when the waterlogged soils dry out. Iowa State University , Ames, Iowa. This information subject to a usage policy .