Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Dhillon, Jagmandeep
Committee Member
Fox, Amelia
Committee Member
Singh, Gurbir
Committee Member
Ferguson, Connor
Date of Degree
12-9-2022
Document Type
Graduate Thesis - Open Access
Major
Agronomy
Degree Name
Master of Science (M.S.)
College
College of Agriculture and Life Sciences
Department
Department of Plant and Soil Sciences
Abstract
12 N treatments in 2020 and 11 in 2021 were replicated four times over four locations in a randomized complete block design. The first research tested the efficacy of CYG for Mississippi corn (Zea mays L.) production. The optimum N rates were calculated by fitting four models. Differences between the CYG rate and AONR were compared. AONR varied from 134 to 301 kg N ha–1 at different management levels. When we compared the AONR to the CYG rate, the CYG rate over-recommended N in 12 of the 14 possible comparisons. The second study compared different VIs, methods, and sensors at various corn stages to predict in-season yield potential. Relative VI measurements were superior for grain yield prediction. MicaSense best predicted yield at the VT-R1 stages, Crop Circle and SPAD at VT, and GreenSeeker at V10. When VIs were compared, SCCCI outperformed other VIs.
Recommended Citation
Oglesby, Camden Dawson, "Reassessing nitrogen management for maize production in Mississippi" (2022). Theses and Dissertations. 5693.
https://scholarsjunction.msstate.edu/td/5693
