The objectives of the Oregon State Soil Science Club are to learn, describe, and classify different types of soil. They determine important aspects of the soil and develop skills that help them to compete at Regional and National competitions.

Interested in becoming a member? Contact Advisor Will Austin.

pH Kits and Supplies

Separate pH kits are available for Western Oregon and for Eastern Oregon. Each kit contains:

  • three 40 ml bottles of dye
  • three color cards
  • a spot plate
  • and instructions

The Western Oregon kit covers the pH range from 3.8 to 7. It includes one 40 ml bottle of each of the following dyes:

  • Bromocresol Green
  • Chlorophenol Red
  • Bromthymol Blue

The Eastern Oregon kit covers the pH range from 6.0 to 9.6. It includes one 40 ml bottle of each of the following dyes:

  • Bromthymol Blue
  • Phenol Red
  • Thymol Blue

The following dyes are available in bulk quantities and as replacement supplies for the pH kits:

  • Bromocresol Green  -  pH 3.8 - 5.4  
  • Bromthymol Blue  -  pH 6.0 - 7.6
  • Chlorophenal Red  -  pH 5.2 - 6.9  
  • Phenol Red  -  pH 6.8 - 8.4
  • Cresol Red  -  pH 7.2 - 8.8  
  • Thymol Blue  -  pH 8.0 - 9.6

When ordering dyes and color cards separately, please indicate specific name (e.g. Chlorophenol Red).
Unless otherwise requested orders will be shipped via UPS.
pH Kit  
Western Oregon  $20.00
Eastern Oregon  $20.00
500 ml bottle  $12.00
250 ml bottle  $8.00
125 ml bottle  $6.00
40 ml bottle  $3.00
Spot Plates, each  $5.00
Color Cards, each  $3.00

*Refills: You will be credited $.50 for each bottle returned clean enough to refill and send back to you (clean means rinsed and dried).

For phone orders/inquiries, please call:
Extension Soil Science, (541) 737-5712.

Mail orders to:
OSU Soils Club
Oregon State University
Department of Crop and Soil Science
3017 Ag & Life Science Building
Corvallis, OR 97331-7306

Please make checks payable to: OSU Soils Club

Allow 2-4 weeks for shipment