Pearl City Urban Garden Center
955 Kamehameha Hwy
Pearl City, Hawaii 96782

Phone: (808) 453-6050


Joshua Silva

Assistant Extension Agent 


Tropical Soil Science; Food Safety


B.S. Natural Resources and Environmental Management, University of Hawaii; M.S. Tropical Plant and Soil Sciences, University of Hawaii

Research Interests:

Soil Fertility; New Crop Varieties; Food Safety; Precision Agriculture; Pest and Disease Management

Selected Publications:

  • Silva, J.H.S., Deenik, J.L., Yost, R.S., Bruland, G.L., Crow, S.E. 2015. Improving clay content measurement in oxidic and volcanic ash soils of Hawaii by increasing dispersant concentration and ultrasonic energy levels. Geoderma 237-238: 211-223.
  • Hawaii Soil Atlas