Theses and Dissertations



Dhillon, Jagmandeep

Committee Member

Bheemanahalli, Raju Rangappa

Committee Member

Bryant, Corey

Committee Member

Reed, Vaughn

Committee Member

Larson, Erick

Date of Degree


Original embargo terms

Embargo 1 year

Document Type

Graduate Thesis - Open Access


Plant and Soil Sciences (Agronomy)

Degree Name

Master of Science (M.S.)


College of Agriculture and Life Sciences


Department of Plant and Soil Sciences


A field study was conducted in 2022 and 2023 at two different locations in Mississippi (MS) implementing a split-plot design. Nitrogen (N) rates as the main plot including 0 (control), 90, 180, 269 kg N ha-1 at Starkville and 224 kg N ha-1 at Stoneville. The subplot was seven treatments, including a no biostimulant (check) and six commercially available microbial biostimulants (Source Corn®, Envita®, iNvigorate®, Blue N®, Micro AZTM, and Bio level phosN®) applied either as foliar at V4-V5 growth stages or in-furrow at planting. Only N rates positively affected grain yield and nitrogen use efficiency at all site years. The agronomic optimum N rate (AONR) differed across all site years, ranging from 202, 128, and 166 kg N ha-1 at Starkville 2023 and Stoneville 2022 and 2023. In summary, microbial biostimulants within this study showed minimal to no effect on corn grain yield and all other tested parameters.

Available for download on Thursday, May 15, 2025