The featured map is of soil water content estimates from the Iowa Daily Erosion Project for a layer of soil just below the surface (4-8 inches). Values around 40mm (40% by volume) indicate saturation, which is when the soil has most of its air space filled up with water. This layer presents a difficult problem for Iowa farmers as the immediate top surface has dried out in the past few days thanks to warmer weather and dry air. This deeper layer just below the surface takes a bit longer to dry out and is where tillage equipment needs to work thru. Unfortunately, more rain is on the way today with chances of heavy rain extending into Thursday.

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