The 2013 Precision Ag Action Summit was held on January 21 & 22 in North Dakota. David Clay of South Dakota State University gave a presentation on “Precision farming, soil sampling, remote sensing for in‐season N recommendations”. In the presentation he asked the question “can we improve our management of an extremely variable system with remote sensing?”

Summary from his presentation:
— Reference areas can be used to reduce variety and water stress impacts on sufficiency index values.
— Reference areas can be place in a strip or within different management zones.
— Using a reference area in high yielding areas can result in diagnosing water stress as N stress.
— In low yielding areas N stress can be diagnosed as water stress.

Click here to view his full presentation.