Under review

Verdi, A., A. Sapkota, A. Singh, J.C. Iradukunda, and Z. Amiri. Relationship between irrigation application uniformity and near-surface soil moisture distribution in urban landscapes.

Amiri, Z., A. Sapkota, A. Singh, J.C. Iradukunda, and A. Verdi. Species-specific evapotranspiration dynamics of urban groundcovers quantified using UAV thermal and multispectral imagery.

Fordyce, S., E. Sproles, P. Carr, S. Ewing, A. Sapkota, and S. Tuttle. Sensitivity of L-Band microwaves to subsurface cobbles in thin soils (< 0.5 m) and implications for agrohydrology.

2026

Iradukunda, J.C., A. Sapkota, Z. Amiri, and A. Verdi. 2026. Predicting CO2 emissions using UAV spectral and thermal data in urban lawns: a case study of Buffalograss and St. Augustinegrass. Urban Forestry & Urban Greening, 118:129297 doi: 10.1016/j.ufug.2026.129297

2025

Sapkota, A., M. Roby, S.R. Peddinti, A. Fulton, and I. Kisekka. 2025. Comparative analysis of evapotranspiration (ET), crop water stress index (CWSI), and normalized difference vegetation index (NDVI) to delineate site-specific irrigation management zones in almond orchards. Scientia Horticulturae, 339:113860 doi:10.1016/j.scienta.2024.113860

2024

Sapkota, A., A. Verdi, E. Scudiero, and A. Montazar. 2024. Assessing the effectiveness of satellite and UAV-based remote sensing for delineating alfalfa management zones under heterogeneous rootzone soil salinity. Smart Agricultural Technology, 9:100583 doi:10.1016/j.atech.2024.100583

Tiwari, R., A. Sapkota, N. Boyd, and R. Kanissery. 2024. Purple nutsedge management in tomato plasticulture: A study on the effectiveness of preemergence herbicide S-metolachlor and its co-application with fertilizer enhancer and chelated iron. Agrosystems, Geosciences & Environment, 7:e20563. doi:10.1002/agg2.20563

Media Coverage: Herbicide plus fertilizer equals fewer weeds and, thus more tomatoes. UF/IFAS University of Florida Blogs. Available at: https://blogs.ifas.ufl.edu/news/2024/10/24/herbicide-plus-fertilizer-equals-fewer-weeds-and-thus-more-tomatoes/ 

Singh, A., A. Verdi, D. Haver, A. Sapkota, and J.C. Iradukunda. 2024. Using a soil moisture sensor-based smart controller for autonomous irrigation management of hybrid bermudagrass with recycled water in coastal southern California. Agricultural Water Management. 299:108906 doi:10.1016/j.agwat.2024.108906

Verdi, A., A. Singh, A. Sapkota, and S. Ghodsi. 2024. Assessing the impact of water conservation on cooling potential of two turfgrass species. Journal of the ASABE. 67:749-759 doi: 10.13031/ja.15845

2023

Haghverdi, A., A. Sapkota, A. Singh, S. Ghodsi, and M. Reiter. 2023. Developing turfgrass water response function and assessing visual quality, soil moisture and NDVI dynamics of tall fescue under varying irrigation scenarios in inland southern California. Journal of the ASABE 66:1497-1512 doi: 10.13031/ja.15687

Sapkota, A., A. Haghverdi, and D. Merhaut. 2023. Effects of deficit irrigation on canopy temperature dynamics and physiology of landscape groundcovers. HortScience  58:1321-1331 doi: 10.21273/HORTSCI17303-23

Sapkota, A., A. Haghverdi, and A. Montazar. 2023. Estimating fall-harvested alfalfa (Medicago sativa L.) yield using unmanned aerial vehicle–based multispectral and thermal images in southern California. Agrosystems, Geosciences & Environment. 6:e20392. doi:10.1002/agg2.20392

Sapkota, A., A. Haghverdi, D. Merhaut, A. Singh, and J.C. Iradukunda. 2023. Response of landscape groundcovers to deficit irrigation: an assessment based on normalized difference vegetation index and visual quality rating. HortScience 58:274-285 doi:10.21273/HORTSCI16915-22

Media Coverage: The grass isn’t always greener. UCR Magazine. Summer 2022. Available at: https://news.ucr.edu/ucr-magazine/summer-2022/the-grass-isnt-always-greener

2022

Garg, A., A. Sapkota, and A. Haghverdi. 2022. SAMZ-Desert: A satellite-based agricultural management zoning tool for the desert agriculture region of southern California. Computers and Electronics in Agriculture 194:106803. doi:10.1016/j.compag.2022.106803 

2021

Haghverdi, A., M. Reiter, A Singh, and A. Sapkota. 2021. Hybrid bermudagrass and tall fescue turfgrass irrigation in central California: II. Assessment of NDVI, CWSI, and canopy temperature dynamics. Agronomy 11:1733. doi:10.3390/agronomy11091733

Haghverdi, A., M. Reiter, A. Sapkota, and A Singh. 2021. Hybrid bermudagrass and tall fescue turfgrass irrigation in central California: I. Assessment of visual quality, soil moisture and performance of an ET-based smart controller. Agronomy 11:1666. doi:10.3390/agronomy11081666

Haghverdi, A., A Singh, A. Sapkota, M. Reiter, and S. Ghodsi. 2021. Developing irrigation water conservation strategies for hybrid Bermudagrass using an evapotranspiration-based smart irrigation controller in inland southern California. Agricultural Water Management 245:106586. doi:10.1016/j.agwat.2020.106586

2020

Sapkota, A., A. Haghverdi, C.C.E Avila, and S.C. Ying. 2020. Irrigation and greenhouse gas emissions: a review of field-based studies. Soil Systems 4:20. doi:10.3390/soilsystems4020020

2019

Sapkota, A., E.C. Meccage, R.N. Stougaard, B. Bicego, and J.A. Torrion. 2019. Applied boron increases alfalfa tissue boron concentration across water regimes, not yield. Agronomy Journal 111:3220-3229. doi:10.2134/agronj2019.02.0085 

Media Coverage: Applied boron did not increase alfalfa yield. CSA News Magazine. doi:10.2134/csa2019.64.S067 

Bicego, B., A. Sapkota, and J.A. Torrion. 2019. Differential nitrogen and water impacts on yield and quality of wheat classes. Agronomy Journal  111:2792-2803. doi:10.2134/agronj2019.04.0283

Torrion, J. A., O. S. Walsh, X. Liang, B. Bicego, and A. Sapkota. 2019. Managing ‘Egan’ wheat with a gene for high grain protein. Agrosystems, Geosciences & Environment 2:190019. doi:10.2134/age2019.03.0019

2018 

Sapkota, A., E.C. Meccage, R.N. Stougaard, J.P. Tanner, D.M. Peterson, and J.A. Torrion. 2018. Boron fertilization of irrigated alfalfa in Montana. Crop, Forage & Turfgrass Management 4:170085. doi:10.2134/cftm2017.11.0085