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1	An Analysis of Grain Corn Nutritional Supplements and Relative Maturity in Mississippi Whittenton, Joseph Bryan 04 May 2018 (has links) A review of available corn relative maturity groups in Mississippi shows a limited range of maturity groups in use. Research focusing on expanding the range of maturity groups was conducted in MS in 2015 and 2016. Along with expanded maturity groups, treatments of fertilizer (10-34-0), foliar zinc, and a plant hormone blend were studied to shorten the growing season. Four site years in MS were studied to determine optimal plant maturity group and treatment for length of season. The results showed decreased yield of 0.09-0.15 Mg ha-1 (1.5-2.3 bu ac-1) for each day of decreasing relative maturity in three of four site years. The addition of starter fertilizer increased vegetative growth stage, plant height V5 and V7, SPAD values at V5, and significantly decreases days to tassel and silking reproductive growth stages but did not affect yield. NDRE LREI SI ENDVI GNDVI NDVI plants per acre vegetation indices 30000 density leaf area index kernel column kernel row weight kernel tassel plant height brooksville verona starkville mississippi hybrid maturity foliar 2016 2015 corn yield spad spectral starter fertilizer 10-34-0 polyphosphate fertilizer zinc hormone ascend pioneer dekalb relative maturity