Richard J. Volk

Glasener, K. M., Wagger, M. G., MacKown, C. T., & Volk, R. J. (2002). Contributions of shoot and root nitrogen-15 labeled legume nitrogen sources to a sequence of three cereal crops. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 66(2), 523–530. https://doi.org/10.2136/sssaj2002.0523

Muriuki, A. W., King, L. D., & Volk, R. J. (2001). Nitrogen-15 recovery in soil incubated with potassium nitrate and clover residues. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 65(5), 1430–1436. https://doi.org/10.2136/sssaj2001.6551430x

Glasener, K. M., Wagger, M. G., MacKown, C. T., & Volk, R. J. (1998). Nitrogen-15 labeling effectiveness of two tropical legumes. PLANT AND SOIL, 200(2), 149–156. https://doi.org/10.1023/A:1004330514833

Feng, J. N., Volk, R. J., & Jackson, W. A. (1998). Source and magnitude of ammonium generation in maize roots. PLANT PHYSIOLOGY, 118(3), 835–841. https://doi.org/10.1104/pp.118.3.835

Crozier, C. R., King, L. D., & Volk, R. J. (1998). Tracing nitrogen movement in corn production systems in the North Carolina Piedmont: A nitrogen-15 study. AGRONOMY JOURNAL, 90(2), 171–177. https://doi.org/10.2134/agronj1998.00021962009000020009x

Volk, R. J. (1997). Unidirectional fluxes of nitrate into and out of maize roots: measurement and regulation by prior nitrate nutrition. Plant Science, 123(1997), 1–7. https://doi.org/10.1016/S0168-9452(96)04560-8

Volk, R., Chaillou, S., Mariotti, A., & Morot-Gaudry, J. F. (1992). Beneficial effects of concurrent ammonium and nitrate nutrition on the growth of Phaseolus vulgaris: A 15N study. Plant Physiology and Biochemistry, 30(4), 487.

VOLK, R. J., PEARSON, C. J., & JACKSON, W. A. (1979). REDUCTION OF PLANT-TISSUE NITRATE TO NITRIC-OXIDE FOR MASS-SPECTROMETRIC N-15 ANALYSIS. ANALYTICAL BIOCHEMISTRY, 97(1), 131–135. https://doi.org/10.1016/0003-2697(79)90336-1

Volk, R. J., & Jackson, W. A. (1972). Photorespira-tory phenomena in maize: Oxygen uptake, isotope discrimination and carbon dioxide efflux. Plant Physiology, 49(2), 218. https://doi.org/10.1104/pp.49.2.218