Franzen, D. W., Evidence for the ability of active optical sensors to detect sulfur deficiency in corn

Franzen, D. W., Sharma, L. K., Bu, H., and Denton, A.. 2016: Evidence for the ability of active optical sensors to detect sulfur deficiency in corn. Agronomy Journal, 108, 2158-2162. doi:10.2134/agronj2016.05.0287.