Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

Kevin R. Day

Photo of Kevin R Day
Pomology Advisor Emeritus
Cooperative Extension Tulare County
4437-B S. Laspina St.
Tulare, CA 93274
(559) 684-3300
krday@ucanr.edu Create VCard

Also in:
Kings County


MS Plant Science, California State University, Fresno. 1985



Fresh-shipping deciduous tree fruits. Cultural practices and production, fruit growth and development, pruning and training systems

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Ayres, James A.; Phene, Claude J.; Phene, Rebecca; Gao, Sudan; Wang, Dong; Day, Kevin R.; Makus, Donald J. (2017). Determining pomegranate water and nitrogen requirements with drip irrigation. Agricultural Water Management. Elsevier B.V. 187, 11-23. 5 March 2017. dx.doi.org/10.1016/j.agwat.2017.03.007
  • Tombesi, S.; Day, K. R.; Johnson, R.S.; DeJong, T. M. (2017). Effectiveness of peach (Prunus persica) rootstocks for vigor control of plum (P.Salicina)scions in relation with xylem vessel size. Acta Horticulturae.T. Robinson. International Society for Horticultural Science. 1177, 111-116.
  • DeJong, T.M.; Johnson, R.S.; Day, Kevin R. (2011). "Controller 5, Controller 9 and Hiawatha peach rootstocks: their performance and physiology." Acta Horticulturae 903: 221-228.
  • Day, Kevin R.; Johnson, R.S.; DeJong, T.M. (2011). "Effect of timing of topping to reduce tree height on subsequent year vigor of early-season â??Arctic Starâ?? nectarine." Acta Horticulturae 903: 711-716.
  • Day, Kevin R.; Buckner, Richard P. (2011). Growing prunes for the fresh market. UC Prune Production Manual.
  • DeJong, T.M.; Negron, C.; Favreau, R.; Day, Kevin R.; Costes, E.; Lopez, G.; Guedon, Y. (2011). "Using concepts of shoot growth and architecture to understand and predict responses to peach tree pruning." Acta Horticulturae
  • Lopez, G.; Day, Kevin R.; DeJong, T.M. (2011). "Why do early spring temperatures reduce peach fruit size and yield at harvest." Acta Horticulturae 903: 1055-1062.
  • Tombesi, S.; Johnson, R. S.; Day, K. R.; DeJong, T. M. (2010). Relationships between xylem vessel characteristics, calculated axial hydraulic conductance and size-controlling capacity of peach rootstocks. Annals of Botany. 105:2, 327-331.
  • Basile, B.; Mariscal, M. J.; Day, K. R.; Johnson, R. S.; DeJong, T. M. (2002). Japanese plum (Prunus salicina L.) fruit growth: Seasonal pattern of source/sink limitations. Journal American Pomological Society. 56:2, 86-93.
  • Rosati, A.; Day, K. R.; DeJong, T. M. (2000). Distribution of leaf mass per unit area and leaf nitrogen concentration determine partitioning of leaf nitrogen within tree canopies. Tree Physiology. 20:4, 271-276.
  • Dejong, T. M.; Day, K. R. (1991). Relationships between Shoot Productivity and Leaf Characteristics in Peach Canopies. Hortscience. 26:10, 1271-1273.
  • Day, K. R.; Dejong, T. M. (1990). Girdling of Early Season Mayfire Nectarine Trees. Journal of Horticultural Science 65(5): 529-534. 65:5, 529-534.
  • DeJong, T. M.; Day, K. R.; Johnson, R. S. (1989). Partitioning of leaf nitrogen with respect to within canopy light exposure and nitrogen availability in peach (Prunus persica). Trees-Structure and Function. 3:2, 89-95.
  • Day, K. R.; Dejong, T. M.; Hewitt, A. A. (1989). Postharvest and Preharvest Summer Pruning of Firebrite Nectarine Trees. Hortscience. 24:2, 238-240.
  • Dejong, T. M.; Day, K.; Johnson, R. S. (1988). Partitioning of Leaf Nitrogen-Content (Photosynthetic Capacity) with Respect to Leaf Canopy, Light Exposure, and Nitrogen Availability in Peach (Prunus-Persica). Hortscience. 23:3, 821-823.
  • Dejong, T. M.; Doyle, J. F.; Day, K. R. (1987). Seasonal Patterns of Reproductive and Vegetative Sink Activity in Early and Late Maturing Peach (Prunus-Persica) Cultivars. Physiologia Plantarum. 71:1, 83-88.

ANR Workgroup Associations

Return to Academic Directory

Webmaster Email: jewarnert@ucanr.edu