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Toolbox resources are designed for self-study and professional development.

Tech Index
	1	= General			(discussion of general concepts)
	2	= Moderately detailed			(general concepts accompanied by supporting data)
	3	= Very detailed			(information of a more theoretical nature)

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Economics of Fertilization

	2	2001	Economics of fertilization
				(T.S. Murrell)
	2	2001	How to determine if starter fertilization is profitable
				(T.S. Murrell)

Nutrient Budgets

	2	2004	Calculating nutrient removal rates of crops
				(T.S. Murrell)
	2	2002	Estimating nutrient budgets
				(T.S. Murrell)
	2	2002	PKalc: nutrient budget estimator
				(T.S. Murrell, L.J. Murrell, Q.B. Rund, and H.F. Reetz, Jr.)

On-Farm Research

	3	2001	Planning and analyzing on-farm research
				(T.S. Murrell and K.J. Moore)

Soil Test Data

	3	2002	Finding trends in soil test data
				(T.S. Murrell, L.J. Murrell, Q.B Rund, and H.F. Reetz, Jr.)

Yield Data

	3	2003	Using ArcGIS for yield data analysis
				(T.S. Murrell and Q.B. Rund)