Soil, Water & Forage Analytical Laboratory Testing Services and Price List

Submitting Samples 

Soil, water and plant samples should be submitted through your County Cooperative Extension Office. They provide sample bags and water bottles and handle mailing of samples to the laboratory. Your County Extension Educators can assist with proper sampling techniques, test result interpretations, and recommendations.

 

Quality Assurance

Accuracy and quality of test results are assured through daily analysis of quality control samples, a three-step internal data review process, and participation in external certification and sample exchange programs. For detailed information regarding our quality assurance practices, call the SWFAL office.

 

Sample Results

Most samples are processed and analyzed within three to five working days and results are posted on the internet. Forage nitrate results are posted two days after samples are received. Charges for laboratory services are billed monthly from the office through which the sample was submitted.

 

SOIL

 

Soil Fertility

 

Routine: $10.00

• pH and buffer Index (Sikora)
• Nitrate-Nitrogen
• Available Phosphorus Index (M3)
• Available Potassium Index (M3)

 

Subsoil Nitrate-Nitrogen: $2.00

• (with submission of surface soil)

 

Nitrate-Nitrogen: $4.00

 

Secondary Nutrients: $4.00

• Sulfate-Sulfur
• Magnesium and Calcium

 

Micronutrients: $4.00

• Iron, Zinc and Boron

 

Organic Matter: $8.00

 

Greenhouse Media:  $20.00

(Saturated Media Extraction)

• Sodium
• Phosphorus
• pH
• Calcium
• Sulfur
• Nitrate-N
• Magnesium
• Boron
• Ammonium-N
• Potassium
• Electrical Conductivity

 

Soil Salinity

 

Salinity Management: $25.00

(1:1 extraction for diagnostic purposes)

• Sodium
• Magnesium
• Calcium
• Potassium
• pH
• Total Dissolved Solids
• Boron
• Electrical Conductivity
• SAR
• ESP

 

Comprehensive Salinity: $55.00

(Saturated paste extraction)

• Sodium
• Magnesium
• Calcium
• Potassium
• Chloride
• Nitrate-Nitrogen
• Sulfate
• Electrical Conductivity
• Carbonate
• Bicarbonate
• pH
• Total Dissolved Solids
• Boron
• ESP
• SAR

 

Soil Texture: $10.00

• Textural Class (Hydrometer Method) % sand, silt, clay

 

WATER

 

Livestock – $15.00

• Sodium
• Sulfate
• Calcium
• Chloride
• Magnesium
• Nitrate
• Potassium
• pH
• Copper
• Hardness
• Iron
• Electrical Conductivity
• Manganese
• Total Dissolved Solids
• Zinc

 

Household – $15.00

• Sodium
• Sulfate
• Calcium
• Chloride
• Magnesium
• Nitrate
• Potassium
• pH
• Copper
• Hardness
• Iron
• Electrical Conductivity
• Manganese
• Total Dissolved Solids
• Zinc

 

Irrigation – $15.00

• Sodium
• Magnesium
• Calcium
• Potassium
• Chloride
• Nitrate-Nitrogen
• Sulfate
• Electrical Conductivity
• pH
• Total Dissolved Solids
• Boron
• Hardness
• Carbonate
• Bicarbonate
• SAR
• Residual Carbonate

 

Homebrewer – $18.00

• Sodium
• Sulfate
• Calcium
• Phosphorus
• Magnesium
• Iron
• Potassium
• Zinc
• Copper
• Hardness
• Manganese
• Electrical Conductivity
• pH
• Total Dissolved Solids
• Alkalinity
• Nitrate
• Chloride

 

Additional analyses are available upon request, or check our website at www.soiltesting.okstate.edu

 

FORAGE AND FEED

 

Protein Only: $8.00

• Protein & Moisture

 

Basic Analysis: $14.00

• Protein & Moisture
• ADF (Acid Detergent Fiber)
• TDN (Total Digestible Nutrients)
• Net Energy for: Gain; Lactation; and Maintenance

 

Basic Plus RFV: $20.00

• Protein, Moisture, ADF, & Energy
• NDF (Neutral Detergent Fiber)
• RFV (Relative Feed Value – for alfalfa only)

 

Nitrate Toxicity: $6.00

• Nitrate
• Moisture

 

Minerals: $12.00

• Ca, P, K, Mg, S, Cu, Fe and Zn

 

Plant Tissue

• TN, P, K, Ca, Mg, S, B, Cu,Fe, Mn and Zn: $20.00

 

Animal Waste and Compost

 

Test 1: $25.00

• pH, EC, Moisture, TN, C, S, P, K, Ca, Mg, Na, Cu, Zn, Mn and Fe

 

Test 2: $6.00

• NH₄-N and NO₃-N

 

Test 3: $8.00

• Water Soluble P

 

Soil, Water & Forage Analytical Laboratory

045 Agricultural Hall

Oklahoma State University
Stillwater, OK 74078
(405) 744- 6630
(405) 744- 9575 Fax
Website: www.soiltesting.okstate.edu 
E-mail: soiltesting@okstate.edu

Oklahoma Cooperative Extension Service

 

Hailin Zhang
SWFAL Director

 

Kendal Henderson
Laboratory Coordinator

 

Barbara McCray

Data Management