Production capacity of farm soils is generally known as a result of decades of recording harvest quantities on a field by field basis.  With that general understanding, matching certain crops to certain soils can be viewed as a straight-forward suitability exercise. Yet now with the implementation of precision agriculture technologies and methods we can ask for within fields “what crop where and when?”  Further, recent development in bio-energy markets has increased the complexity of productivity questions.  As an example, fields deemed “marginal” and taken out of grain production (e.g., CRP) have or will shortly be considered again for farming. These farmlands often have significant areas described as “marginal” because of being poor yielding, environmental sensitive, or both.  The objective of this analysis will to show how precision agricultural technologies can be used to target grain and biomass production strategies within fields.  The claypan soil of Northeast Missouri will be used as a case-study to illustrate the principles to be presented.