Soil Testing

Soil Testing

Soil Testing

  • Image of Soil Lab equipment

Soil Testing

UOG Soil Lab

Location: Agriculture & Life Sciences Bldg., Room 216
Tel: (671) 735-2143/34 / (671) 988-9194
Email: soillab@triton.uog.edu

The Soil Lab under UOG Land Grant conducts soil analyses for farmers and gardeners wanting to improve their crop production as well as for business clients in landscaping, construction, and other industries.

Item 

Description

Unit

Price (US$)

1

pH

per sample

$30

2

Electrical Conductivity

per sample

$30

3

Organic Matter (commercial)

per sample

$100

 

Organic Matter (research)

Per sample

$50

4

Phosphorus (Olsen)

per sample

$55

5

Phosphorus (Bray 1)

per sample

$55

6

Potassium

per sample

$55

7

Sodium

per sample

$55

8

Calcium

per sample

$55

9

Magnesium

per sample

$55

10

Cation Exchange Capacity

per sample

$70

11

CaCO3

per sample

$92

12

Particle size analysis (commercial)

per sample

$100

 

Particle size analysis (research)

per sample

$50

13

Total Nitrogen

per sample

$120

14

Total Carbon

per sample

$120

15

Nitrate Nitrogen

per sample

$75

16

Ammonium Nitrogen

per sample

$75

17

Sulphate

per sample

$75

18

Bulk density

per sample

$50

19

Porosity

per sample

$50

20

Moisture content

per sample

$50

21

Dry aggregate stability

per sample

$70

22

Wet aggregate stability

per sample

$80

23

Active carbon

per sample

$70

24

CO2 burst method

per sample

$85

25

Metal by Flame (Silver-Ag)

per sample

$65

26

Metal by Flame Cadmium

per sample

$65

27

Metal by Flame Cobalt

per sample

$65

28

Metal by Flame Nickel

per sample

$65

29

Metal by Flame Lead

per sample

$65

30

Metal by Flame Sulphur

per sample

$65

31

Metal by Flame Zinc

per sample

$65

32

Metal by Flame Iron

per sample

$65

33

Metal by Flame Manganese

per sample

$65

34

Metal by Flame Copper

per sample

$65

35

Extended Hours Fee (Monday to Friday, non-regular working hours)

prepayment required

$100

36

Extended Hours Observed (Weekend, non-regular working hours)

prepayment required

$100

37

Extended Hours Fee (Observed Holidays, non-regular working hours)

prepayment required

$100

38

Expedite Hours Fee (Friday)

Analysis subtotal x2 per customer

$100

39

Expedite Report (5 working days) - Rush

per 5 samples

$100

40

Expedite Report (3 working days) - Urgent

per 5 samples

$150

41

Sampling

per hour

$100

42

Disposal

 

$100

43

Sampling bags

per 20 samples

$20

44

Reporting

 

$50

45

Recommendation

 

$100

46

Distilled/Deionized water

per 5 gallons

$20

Notes:

  • Payment is required before any analysis will be carried out. Payment may be made by check, credit card authorization form, or electronic transfer.
  • Results will be available between 15 and 20 working days.
  • All tests include free recommendations and sampling bags from the University of Guam Soil Lab. To reduce environmental pollution, the University of Guam Soil Lab has environmentally friendly sampling bags. Kindly call (671) 735-2143 before taking your samples to get these bags.

Discounts:

  • 10% discount on orders of $1,000 or more.
  • Research receives 20% discount on orders of $1,000 or more.
  • Bonafide farmers registered with the Guam Department of Agriculture receive a discounted rate of $50 per sample for routine soil analysis.

Payment:

Payment is required before any analysis will be carried out. Payment may be made via:

  • Check: Please make checks payable to “UOG Soil Lab, University of Guam” and indicate the following in the Memo line: “Account No. 61-00-246031-0-4401010”
  • Credit Card: Please fill out a credit card authorization form and email to rbalaan@triton.uog.edu.
  • Electronic/Wire Transfer: Please fill out the wire transfer form and email to rbalaan@triton.uog.edu.
Dropoff information

Samples can be delivered to Room 216 of the Agriculture & Life Sciences Bldg. on the UOG campus during the hours of 8:30 a.m. - 3:30 p.m., Monday - Friday.

Sample bags: To reduce environmental pollution, the University of Guam Soil Lab has environmentally friendly sampling bags. Kindly call (671) 988-9194 or (671) 735-2143 before taking your samples to get these bags.

Turnaround time for analysis/pickup

The results of your soil test will be available in 15-20 working days. Payment is required before any analysis will be carried out.

 

Procedures for Shipping Regulated Soil to the UOG Soil Lab

Shipping Requirements

  • All inbound shipments must arrive with an APHIS-approved carrier, along with a PPQ Form, an inspection certificate, and soil treatment documentation.
  • A notification must be sent to the UOG Soil Lab contact at least 48 hours prior to shipment.
  • Soil samples should be stored in a dedicated, sealed container and transported in transport tubs lined with plastic sheeting.
  • Information on the log receipt date, shipper, quantity, condition, and seal integrity should be included and recorded in the Regulated Materials Logbook.

Triple Containment Packaging Requirements

  • The primary (inner) container must be watertight and securely sealed (e.g., vial, Ziplock bag, test tube) to hold the material and withstand pressure and temperature changes.
  • The secondary container should be a strong, waterproof outer layer with an absorbent material (for liquids) to hold the entire contents of the primary container in case of a spill.
  • The outer tertiary container should be a sturdy, durable shipping box that can withstand drops, stacking, transportation, and close securely.

The original permit-specific label should be attached to the outer package.

The University of Guam Soil Lab is a registered member of the North American Proficiency Testing Program, a program of the Soil Science Society of America.

Last updated: April 1, 2026