Topdressing nitrogen recommendation for early rice with an active sensor in south China

Winter Wheat Crop Reflectance and Nitrogen Sufficiency Index Values are Influenced by Nitrogen and Water Stress

(2012) David E. Clay et al.   AGRONOMY JOURNAL

Is data needed from every field to determine in-season precision nitrogen recommendations in winter wheat?

(2012) D. C. Roberts et al.   PRECISION AGRICULTURE

Assessment of the nitrogen management strategy using an optical sensor for irrigated wheat

(2011) Bijay-Singh et al.   Agronomy for Sustainable Development

Improving in-season nitrogen recommendations for maize using an active sensor

(2010) J. Schmidt et al.   FIELD CROPS RESEARCH

Recommendations for nitrogen fertiliser topdressing rates in rice using canopy reflectance spectra

(2008) Lihong Xue et al.   BIOSYSTEMS ENGINEERING

Adjusting Midseason Nitrogen Rate Using a Sensor-Based Optimization Algorithm to Increase Use Efficiency in Corn

(2008) B. S. Tubaña et al.   JOURNAL OF PLANT NUTRITION