Corn (Zea mays L.) is the most widely cultivated and multipurpose crop known for its high nitrogen demand. However, modern hybrids and intensive fertilization may have undermined the below-ground performances (roots, soil, and microbial abundances) of corn. Newly introduced short-statured corn hybrids may have greater root biomass and, other biological components, therefore increasing soil carbon-building potential. However, there is little documentation on their potential below-ground benefits relative to traditional hybrids. This study aims to investigate how fertilization rates affect the hidden half-performance of short corn in comparison to conventional tall-stature corn hybrids. Field experiments are being conducted at two locations within Indiana, encompassing two contrasting corn statures, and four nitrogen rates (0, 90, 180, and 270lb/ac). Below-ground root and soil samples (0-60cm at 20cm increments) will be collected during the R2 growth stage of corn (the timing when corn has achieved maximum root growth). Soil cores would be sampled utilizing a hydraulic Giddings probe with a dimension of 6.8 cm in diameter and 120 cm long, followed by scanning and image analysis to quantify root morphological traits, biomass, as well as C and N concentrations. Thus, this G×E×M interaction data will provide insight regarding the potential optimization of N rates with corn hybrids to enhance below-ground performance and soil carbon accumulation.
