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Project Details:
References
Justification
Objectives
Methodology
With the unpredictability of N fertilizer prices has come a rise in alternative sources of N such as animal manure. However, manure management presents producers with a number of challenges, including the variability and uncertainty of N form and quantity in manure, mineralization of organic N, and effects of application methods. Producers in Kansas often top-dress winter wheat with supplemental in-season N on manure-amended soils; however, considering the aforementioned concerns additional research is needed to assist in determining the appropriate amount of fertilizer to add in these situations. Optical sensors that remotely sense in-season crop N can potentially aid producers with manure and N management. It is well documented that optical sensors have produced good results in creating in-season N recommendations for commercially fertilized soils (Raun et al., 2002; Raun et al., 2005). However, little is known regarding the sensors’ effectiveness on manure-amended fields.
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