- Aug 2008: Ph.D. in Agronomy (Crop Physiology). Mississippi State University, MS, USA
- May 2004: M.S. in Agriculture (Plant Physiology). Banaras Hindu University, Varanasi, U.P. India
- May 2001: B.S. in Agriculture. C.S.A. University of Agriculture and Technology, Kanpur, U.P. India
- August 2014 to current: Research Assistant Scientist, Adaptive Cropping Systems Laboratory, USDA/ARS, Beltsville, MD, USA; and Wye Research and Education Center, AGNR, University of Maryland, College Park, MD, USA
- July 2011 to August 2014: Research Associate, Crop Systems and Global Change Lab, USDA/ARS, Beltsville, MD, USA; and Wye Research and Education Center, AGNR, University of Maryland, College Park, MD, USA
- August 2008 to June 2011: Postdoctoral Research Associate, Division of Plant Sciences, University of Missouri- Columbia, MO, USA
- August 2004 to August 2008: Graduate Research Assistant, Mississippi State University, MS, USA
My research interests are based on the integrative approach to address critical issues in the sustainable crop production as challenged by multiple soil and environmental constraints. The overall aim is to device methods for smart-agriculture by understanding the mechanisms of resilience, adaptation, and mitigation in a sustainable agriculture system. As essential components of my research, I have been deeply involved in developing climate-ready crop cultivars, which warrant tolerance to abiotic stresses, greater resources use efficiency and high yield. I am interested in the cropping system with the best agronomic practices for the non-limited and limited resource conditions (e.g. water and nutrients). Currently, Dr. Singh’s research is mainly focused on quantifying water and nutrient relation of crop plants and developing process based algorithms to improve crop simulation models GOSSYM (cotton), SPUDSIM (potato), and GLYCIM (soybean). This research emphasizes nutrient stress and its impact on the interaction with climate change factors such as CO2 and temperature, and drought. Quantification of crop growth, developmental rates and their dependence on the photosynthetic capacity which relates to the range of internal and external factors such as tissue nutrient concentrations, temperature, water and carbon dioxide to understand the underlying mechanism of plant responses. Dr. Singh’s some other research works are highlighted below:
- Planning and conducting experiments to establish empirical relationships between crop agronomic traits and abiotic factors (water, nutrients, temperature), which is used in the crop simulation models (corn, soybean, and potato) to improve their yield predictive capabilities under current and future climatic scenarios, and to assist in the decision making process for the application of crop inputs.
- Working on the impact of Climate Change factors, and Nutrient Interaction on crop physiological, vegetative and reproductive processes.
- Tissue nutrients such as N, P, and K balance in plant organs and impacts on grain nutritional qualities.
- Coupling high-throughput genetic and phenotypic information for soybean yield enhancement and drought tolerance in USDA germplasm collections.
- Screening of crop genotypes to improve yield and drought tolerance under field conditions.
- Developing and validating remote sensing hyperspectral algorithms in crops for water and nutrient management and precision agriculture.
- Abiotic stress factors (water and nutrients stress, CO2, temperature, UV-B radiation) and their interactions with crops (corn, cotton, cowpea, canola, soybean, switchgrass) grown in controlled environments or under the field.
- Developing screening methods for abiotic stresses in agronomic crops.
- Singh, S.K., Reddy, V.R. 2017: Potassium starvation limits soybean growth More than the photosynthetic processes across CO2 Levels, Frontiers in Plant Science, 8#991:1-16.
- Singh, S.K., Reddy, V.R., Fleisher, D.H. and Timlin, D.J. 2017: Relationship between photosynthetic pigments and chlorophyll fluorescence in soybean under varying phosphorus nutrition at ambient and elevated CO2, Photosynthetica 55:421-433.
- Singh, S.K., Houx, J. H. III., Maw, J.W., and Fritschi, F.B. 2017. Assessment of growth, leaf N concentration and chlorophyll content of sweet sorghum using canopy reflectance. Field Crop Research 209: 47-57.
- Singh, SK., Barnaby, J., Reddy, VR., and Sicher, R. 2016: Varying response of the concentration and yield of soybean seed mineral elements, carbohydrates, organic acids, amino acids, protein, and oil to phosphorus starvation and CO2 enrichment, Frontiers in Plant Science, 7:1967.
- Guangli Xu, Singh, S.K., Reddy, V.R., Barnaby, J.Y., Sicher, R.C., Li, T. 2016: Soybean grown under elevated CO2 benefits more under low temperature than high temperature stress: varying response of photosynthetic limitations, leaf metabolites, growth, and seed yield, Journal of Plant Physiology 205: 20-32.
- Guangli Xu, Singh, S.K., Reddy, V.R., Barnaby, J.Y., Sicher, R.C., Li, T. 2016: Effects of growth temperature and carbon dioxide enrichment on soybean seed components at different stages of development, Plant Physiology and Biochemistry 108: 313-322.
- Dhanapal, A.P., Ray, J.D., Singh, S.K., Villegas-Hoyos, H., Smith, J.R., Purcell, L., King, A., Fritschi, F.B. 2016. Genome-wide association mapping of soybean chlorophyll traits based on canopy spectral reflectance and leaf extracts, BMC Plant Biology 16: 174.
- Singh, S.K., Reddy, V.R. 2016: Methods of mesophyll conductance estimation: its impact on key biochemical parameters and photosynthetic limitations in phosphorus stressed soybean across CO2, Physiologia Plantarum 157 (2):234-254.
- Dhanapal, A.P., Ray, J.D., Singh, S.K., Villegas-Hoyos, H., Smith, J.R., Purcell, L., King, A., and Fritschi, F.B. 2015. Association mapping of total carotenoids in diverse soybean [Glycine max (L.) Merr.] genotypes based on leaf extracts and high-throughput canopy spectral reflectance measurements, PloS-ONE Doi 10.1371/journal.pone.0137213.
- Dhanapal, A.P., Ray, J.D., Singh, S.K., Villegas-Hoyos, H., Smith, J.R., Purcell, L., King, A., and Fritschi, F.B. 2015. Genome-wide association analysis of diverse soybean genotypes reveals novel markers for nitrogen traits, The Plant Genome 8 (3):1-15.
- Singh, S.K., and Reddy, V.R. 2015. Response of carbon assimilation and chlorophyll fluorescence to soybean leaf phosphorus across CO2: alternative electron sink, nutrient efficiency and critical phosphorus concentration, Journal of Photochemistry and Photobiology B:Biology 151: 276-284.
- Ray, J.D. Dhanapal, A.P., Singh, S.K., Hoyos-Villegas, H., Smith, J.R., Purcell, L., King, A., Boykin, D., Cregan, P.B., Song, Q., Fritschi, F.B. 2015. Genome-wide association study of ureide concentration in diverse maturity group IV soybean [Glycine max (L.) Merr.] accessions, G3: GENES, GENOMES, GENETICS doi:10.1534/g3.115.021774.
- Dhanapal, A.P., Ray, J.D., Singh, S.K., Villegas-Hoyos, H., Smith, J.R., King, A., Purcell, L., Cregan, P.B., and Fritschi, F.B. 2015. Genome-wide association study (GWAS) of carbon isotope ratio (d13C) in diverse soybean [Glycine max (L.) Merr.] genotypes, Theoretical and Applied Genetics 128:72-91.
- Singh, S.K. and Reddy, V.R. 2014. Combined effects of phosphorus nutrition and elevated carbon dioxide concentration on chlorophyll fluorescence, photosynthesis, and nutrient efficiency of cotton, Journal of Plant Nutrition and Soil Science 177:892-902.
- Singh, S.K., Reddy, V.R., Fleisher, D.H. and Timlin, D.J. 2014. Growth, nutrient dynamics, and efficiency responses to carbon dioxide and phosphorus nutrition in soybean, Journal of Plant Interactions 9:838-849.
- Villegas-Hoyos, H., Houx, J. H. III, Singh, S.K., and Fritschi, F.B. 2014. Ground-based digital imaging as a tool to assess soybean growth and yield, Crop Science 54:1756-1768.
- Singh, S.K., Reddy, K.R., Reddy, V.R., and Gao, W 2014. Maize growth and developmental responses to temperature and ultraviolet-B radiation interaction, Photosynthetica 52:262-271.
- Singh, S.K., Badgujar, G.B., Reddy, V.R., Fleisher, D.H. and Timlin, D.J. 2013. Effect of phosphorus nutrition on growth and physiology of cotton under ambient and elevated carbon dioxide, Journal of Agronomy and Crop Sciences 199:436-448.
- Singh, S.K., Jeffery D. Ray, James R. Smith, Villegas-Hoyos, H., Felix B. Fritschi. 2013. Quantification of leaf pigments in soybean (Glycine max (L.) Merr.) based on wavelet decomposition of hyperspectral features, Field Crop Research 149:20-32.
- Reddy, K.R. Singh, S.K., Koti, S., Kakani, V.G., Zhao, D., Gao, W. and Reddy, V.R. 2013. Quantifying the effects of corn growth and physiological responses to ultraviolet-B radiation for modeling, Agronomy Journal 105:1367-1377.
- Singh, S.K., Badgujar, G., Reddy, V. R., Fleisher, D. and Bunce, J. 2013. Carbon dioxide diffusion across stomata and mesophyll and photo-biochemical processes as affected by growth CO2 and phosphorus nutrition in cotton, Journal of Plant Physiology 170:801-813.
- Singh, S.K., Villegas-Hoyos, H., Houx, J. H. III and Fritschi, F.B. 2012. Influence of artificially restricted rooting depth on soybean yield and seed quality under field condition. Agricultural Water Management 105: 38-47.
- Singh, S.K. and Reddy, K.R. 2011. Regulation of photosynthesis, fluorescence, stomatal conductance and water-use efficiency of cowpea (Vigna unguiculata [L.] Walp.) under drought, Journal of Photochemistry and Photobiology B:Biology 105:40-50.
- – Featured in the ScienceDirect (Ranked 15th) Top 25 Hottest Article and Most Downloaded Article (July – September 2011) MostD
- Singh, S.K., Kakani, V.G., Surabhi, G.K. and Reddy, K.R. 2010. Cowpea ( Vigna unguiculata [L.] Walp.) genotypes response to multiple abiotic stresses, Journal of Photochemistry and Photobiology B:Biology 100:135-146.
- Surabhi, G. K., Reddy, K.R. and Singh, S.K. 2009. Photosynthesis, fluorescence, shoot biomass and seed weight responses of three cowpea (Vigna unguiculata (L.) Walp.) cultivars with contrasting sensitivity to UV-B radiation, Environmental and Experimental Botany 66:160-171.
- – Featured in the ScienceDirect (Ranked 10th) Top 25 Hottest Article and Most Downloaded Article (April – June 2009) MostD
- Singh, S.K., Kakani, V.G., Brand, D., Baldwin, B. and Reddy, K.R. 2008. Assessment of cold and heat tolerance of winter-grown canola cultivars by pollen-based parameters. Journal of Agronomy and Crop Science 194:225-234.
- Singh, S.K. Reddy, K.R., Surabhi, G.K. and Gao, W. 2008. Assessing genotypic variability of cowpea ( Vigna unguiculata [L.] Walp.) to current and projected ultraviolet-B radiation. Journal of Photochemistry and Photobiology B:Biology 93:71-81.
- – Featured in the ScienceDirect (Ranked 11th) Top 25 Hottest Article and Most Downloaded Article (October – December 2008) MostD
Book Chapters and Dissertations:
- Singh, S.K., and Reddy, V.R.,2016. Crops responses to multiple global change drivers and to their interactions. In: Deshmukh, P. Ed. Crop Physiology: Accomplishments and Applications. Springer-Verlag, Under Review.
- Reddy, V.R., Singh, S.K., and Venkatachalam Anbumozhi. 2015. Food supply chain disruption due to natural disaster: entities, risks and strategy for resilience, In: ERIA Discussion Paper Series, The Economic Research Institute for ASEAN and East Asia (ERIA). pp 1-35.
- Singh, S.K., Reddy, V.R., Sharma, M.P., Agnihotri, R. 2015. Dynamics of plant nutrients, utilization and uptake, and soil microbial community in crops under ambient and elevated carbon dioxide In: A. Rakshit, H.B. Singh and A. Sen, eds. Nutrient Use Efficiency: From Basics to Advances, Springer-Verlag. pp 381-399.
- Reddy, K.R., Prasad, P.V, Singh, S.K. 2009. Effect of Ultraviolet-B Radiation and its Interactions with Climate Change Factors on Agricultural Crop Growth and Yield In: W. Gao, D. L. Schmoldt and J. R. Slusser, eds. UV Radiation in Global Change: Measurements, Modeling and Effects on Ecosystems, Springer-Verlag and Tsinghua University. pp 395-436.
- Singh, S. K. 2008. Developing screening tools for abiotic stresses using cowpea [ Vigna unguiculata (L.) Walp.] as a model crop. Ph.D. Dissertation, Mississippi State University, MS, USA.
- Singh, S. K. 2004. Effect of salicylic acid, kinetin and gibberellic acid on growth and biochemical behaviour of mung bean [ Vigna radiata (L.) Wilczek] under salt stress. M.S. Dissertation, Banaras Hindu University, Varanasi, India.