Marianna
Soil Test
Laboratory

Marianna
Soil Test
Laboratory

Marianna
Soil Test
Laboratory

Marianna
Soil Test
Laboratory

  1. Technical Services
    2.  » Soil Testing and Research Laboratory

Quick Information

Monday through Friday
8:00 AM to 4:30 PM

Announcements:

New Web Address:

https://uasoiltest.uada.edu

Delivery:

Please contact the laboratory if you are delivering a large number of samples (870-295-2851) and make sure that soil samples are logged into the system before dropping the samples off.

Presidents/Daisy Gatson Bates Day Holiday

The Soil Testing Laboratory will be closed on March 28 in observance of Presidents/Daisy Gatson Bates Day. The lab will reopen on March 31, 2025 at 8 am. If you deliver soil samples to the drop-off box at the back of the laboratory, please be sure that they are logged into the system and fill out the drop-off form.

 

Cindy Herron & Ashley Morris
Soil Testing and Research Laboratory
8 Lee Rd 214
Marianna, AR 72360
Phone: 870-295-2851
Email: soiltest@uark.edu

Soil Shipping Address:

PO Drawer 767
Marianna, AR 72360

General Mailing Address:

8 Lee Rd 214
Marianna, AR 72360

Virtual Tour

Collect Soil Sample
 

Potassium Deficiency

Potassium Management

Virtual Tour
 

Collect Soil Sample
 

Potassium Deficiency
 

Potassium Management

Mission

Services and Methods

Routine soil analysis provides information on the pH and fertility status of the soil. Soil test results provide guidance on the types and amounts of fertilizer and lime to apply to optimize plant growth and yield. Soil testing is just one component of agronomic and environmental nutrient management that collectively helps sustain plant growth and minimize nutrient losses into the surrounding landscape using the best available science. In Arkansas, routine soil testing is done free of charge provided the soil is from Arkansas and the person submitting the sample is an Arkansas resident. The Fertilizer Tonnage Fee has supported soil testing services and enforcement of fertilizer laws in Arkansas since 1953 and provides free routine testing of soil at the Marianna Laboratory. Routine soil analysis includes measurement of soil water pH and extraction of plant available nutrients using the Mehlich-3 extraction method. A list of routine and non-routine (fee-based) services and references for the analytical methods used by the Marianna Soil Test Laboratory is given below. For information on how to collect and submit a soil sample, please go to How to Submit Soil Samples page.

Laboratory Methods and References

Routine analysis

Mehlich III (Index of nutrient availability for selected nutrients, P, K, Ca, Mg, S, Na, Fe, Mn, Zn, Cu, and B)

Zhang, H., D.H. Hardy, R. Mylavarapu, and J. Wang. 2014. Mehlich-3. In: F.J. Sikora and K.P. Moore, editors, Soil test methods from the southeastern United States. Southern Coop. Ser. Bull. 419. p. 101-110. Univ. of Georgia http://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf.

Soil pH (1:2 soil:water mixture)

Sikora, F.J., and D.E. Kissel. 2014. Soil pH. In: F.J. Sikora and K.P. Moore, editors, Soil test methods from the southeastern United States. Southern Coop. Ser. Bull. 419. p. 48-53. Univ of Georgia http://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

 

Non-routine procedures and prices

Soil Nitrate-N ($6.00 per sample) measured by ion-selective electrode

Gordon, G.V. 1992. Determination of nitrate-nitrogen by specific-ion electrode. In: S.J. Donahue, editor, Reference soil media diagnostic procedures for the Southern Region of the United States. Southern Coop. Ser. Bull. 374. p. 25-27. Univ of Georgia. http://aesl.ces.uga.edu/sera6/?PUB/bulletinNo374.pdf

Zhang, H. and J.J. Wang . 214. Nitrate Nitrogen. In: F. J. Sikora, editor, Soil Test Methods from the Southeast Region of the United States. Southern Coop. Ser. Bull. 419. p. 138-145. Univ of Kentucky. https://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

Soil Organic Matter ($10.00 per sample) measured by Weight Loss on Ignition

Zhang, H., and J.J. Wang. 2014. Measurement of soil salinity and sodicity. In: F.J. Sikora and K.P. Moore, editors, Soil test methods from the southeastern United States. Southern Coop. Ser. Bull. 419. p. 155-157. Univ. of Georgia http://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

Miller, R. and L. Sonon. 214. Nitrate Nitrogen. In: F. J. Sikora, editor, Soil Test Methods from the Southeast Region of the United States. Southern Coop. Ser. Bull. 419. p. 155-157. Univ of Kentucky. https://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

Soil Electrical Conductivity ($6.00 per sample) in 1:2 soil:water mixture

Wang, J.J., T. Provin, and H. Zhang. 2014. Measurement of soil salinity and sodicity. In: F.J. Sikora and K.P. Moore, editors, Soil test methods from the southeastern United States. Southern Coop. Ser. Bull. 419. p. 185-193. Univ. of Georgia. http://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

Soil Texture ($18.00 per sample) by hydrometer

Huluka, G. and R. Miller. 2014. Particle size determination by hydrometer method. In: F.J. Sikora and K.P. Moore, editors, Soil test methods from the southeastern United States. Southern Coop. Ser. Bull. 419. p. 180-184. Univ. of Georgia http://aesl.ces.uga.edu/sera6/?PUB/MethodsManualFinalSERA6.pdf

Prices

Electrical Conductivity $6.00
Nitrates $6.00
Organic Matter $10.00
Chloride $10.00
Soil Texture $18.00
Soil Analyses for Out of State and Research $12.00

Laboratory Proficiency Testing

The Marianna Soil Testing and Research Laboratory participates in laboratory proficiency testing to ensure that our analytical procedures and results are accurate and precise. Starting in 2018, the Marianna Laboratory participates in the Agricultural Laboratory Proficiency Program (ALP). Prior to 2018, the laboratory participated in the North American Proficiency Testing (NAPT) Program. Current and past results from these programs are available upon request.

The Marianna Soil Test Laboratory guidelines on soil sample retention are outlined below. Please contact the laboratory immediately after receiving results if a request for reanalysis is needed.

  • Soil samples will be retained at the laboratory for a maximum of 30 days after analysis or until sample storage space becomes limited.
    • During the rush season (September thru April) sample retention may be as low as 2 weeks.
  • To request reanalysis of samples you will need to provide the laboratory identification number(s) of the sample(s) that need to be reanalyzed and indicate what analytes need to be reanalyzed (pH, Mehlich-3 extractable nutrients, or both).
    • Some soil samples may not contain enough soil for reanalysis.
  • To request sample reanalysis, login to the soil sample submission portal (https://uasoiltest.uada.edu/). Once logged in, click on  “Request a Retest of a Sample” at the bottom of the menu page. Enter the Lab ID and the reason for requesting sample reanalysis and click on” Request sample retest” to submit the request.

How to Submit Soil Samples

Directions for Consultants and Farmers (PDF)

LIMS Training Video

Soil samples must be submitted in a University of Arkansas System Division of Agriculture soil sample box that contains a barcode and sample identification number. Soil sample boxes are available free to Arkansas residents at Arkansas Cooperative Extension Service offices located in each county (https://uaex.uada.edu/counties/). Agriculture consultants needing large quantities of soil sample boxes should contact the Marianna Soil Test Laboratory (870-295-2851).

If information about how to collect a soil sample is needed, please watch the video available at https://uaex.uada.edu/environment-nature/soil/soil-test.aspx or contact the county Extension agent for further assistance.

Soil samples (about 1 pint of soil) may be brought directly to the Marianna Soil Test Laboratory as long as the samples are in barcoded soil sample boxes and sample information has been entered into the online system. Soil samples may also be delivered to the nearest County Extension Office (in a plastic bag or other suitable container and put into a barcoded soil sample box) and be shipped to the Marianna Soil Test Lab.

Soil sample information is now submitted to the laboratory electronically using the website https://uasoiltest.uada.edu/. The CES 435 form is no longer used. Clients must develop an account with a user id and a password to submit samples and view soil test reports. Clients who do not have an email address must submit soil samples through the county office and will receive a soil test report through the mail.

Sample information may be submitted directly by the client or the staff at any County Extension Office.  Regardless of who electronically submits soil samples, the required information includes:

  1. Phone number and mailing address
  2. Email address (if available)
  3. Field or sample name
  4. Plant or crop to be grown ( see crop code Tab above)
  5. For rice, the cultivar is also needed
  6. For selected crops (e.g., corn and forages for hay production), a yield goal is needed.

Other information (non-essential)

  1. Lime history (last 4 years)
  2. Irrigation water source
  3. Field leveling history (last 4 years)
  4. Request and payment for fee-based analysis
  5. Soil Association number Map

The online sample submission program allows users to view the soil samples that have been successfully submitted to the laboratory. Once soil samples have been analyzed, the client will receive an email stating that soil sample analysis is complete and the reports are ready to be viewed, downloaded, or printed. Clients that do not have an email address, will be mailed a hard copy of soil test results directly from the laboratory. Clients with an email address will need to create an account to receive notification of when soil test results are available.

Soils NOT Tested at Marianna Soil Testing Laboratory

If the native soils have been heavily amended with compost, bagged garden soils, mulch, etc the Marianna Soil Test Laboratory will not analyze the samples.  Samples containing or comprised of mulch, potting soil, perlite, and vermiculite, and/or compost are not lab friendly and may contaminate laboratory equipment.  Routine soil analysis is not an appropriate assessment of the suitability of these products for plant growth.

Crop Code by Types

Access Soil Test Results

Generate a Report

Soil Analytical Data

2025

January February March April May June
July August September October November December

 

2024

January February March April May June
July August September October November December

 

2023

January February March April May June
July August September October November December

 

2022

January February March April May June
July August September October November December

 

2021

January February March April May June
July August September October November December

County Agent Information

Link to Log in Samples

Soil sample information is submitted electronically through the following web address: https://uasoiltest.uada.edu/.  The CES 435 (paper) forms are no longer used with the new LIMS program.  Instructions for electronic submission of soil sample information are available HERE – Directions for County Extension or within the sample submission system using the “Help?” buttons.  Please contact the Soil Testing Laboratory at 870-295-2851 for assistance.

Sample Boxes

  1. Soil sample boxes with a barcode must be used to submit soil samples.
  2. Please complete the Name, Address, and County for your client on the front of the box. Field/Sample ID is optional.
  3. The barcode boxes include a printed sample number for identification.
  4. Do not put tape or write on top of the sample boxes.
  5. Do NOT ship wet samples. Please dry samples before shipping to help ensure the integrity of sample boxes, sample numbers, and barcodes within the shipping carton are not compromised. Samples with unscannable barcodes and unidentifiable sample numbers will not be analyzed.
  6. When using labels for a name, address, and county make certain the ink does not smear or fade when wet.  Do NOT place labels over the barcode or sample number.
  7. Please ensure that a sufficient amount of soil is in the soil sample boxes. The box should be at least ¾ full of soil.

 

Packing & Shipping

  1. Please ship soil sample boxes only in the provided shipping cartons. Other shipping contained may not be sturdy enough to prevent damage to soil samples boxes.
  2. When there are not enough soil sample boxes to fill a shipping carton, fill the empty space with paper, large square (4″ × 2″) bubble wrap, or another filler that will keep the soil boxes stable (no movement) during shipping. Do NOT use empty barcoded boxes to fill space in the shipping boxes.
  3. Barcoded boxes do NOT need to be packed in numerical order.
  4. There is no need to put any paperwork in the boxes before shipping. Make sure that the soil sample information has been entered in the LIMS system before shipping the samples to the Marianna Soil Test Lab. Soils samples that have been logged into the system can be viewed in the LIMS software.  At the Main Menu page select “View Submitted Samples” and Choose: Today, Yesterday, This Week, etc… and look for the barcode number(s) for samples that have been successfully submitted.
  5. The Marianna Soil Test Lab will pick up large quantities (250+) of soil samples. If your county has at least 250 samples, please call the lab to schedule a pick up (870-295-2851). Samples are only picked up at the County Extension Office.
  6. Upon arrival at the lab, the barcoded boxes are scanned and assigned a laboratory identification number. Samples are scanned in random order on a first come, first serve basis.
NITROGEN RECOMMENDATIONS – OLDER CULTIVARS
Cultivar Subcode Cultivar Name N Rate Recommendations (for sandy or silt loams)
Total Preflood Midseason Late Boot
013-01 Della 110 65 45 0
013-02 Mars 110 65 45 0
013-03 Jasmine 85 120 75 45 0
013-04 Nortai 120 75 45 0
013-05 Alan 135 90 45 0
013-06 Jackson 135 90 45 0
013-07 Maybelle 135 90 45 0
013-08 Katy 135 90 45 0
013-09 Millie 135 90 45 0
013-10 Newbonnet 135 90 45 0
013-11 Cypress 150 105 45 0
013-12 Priscilla 150 105 45 0
013-13 Lafitte 150 105 45 0
013-14 Lemont 180 135 45 0
013-15 Madison 180 135 45 0
013-16 Dellmont 180 135 45 0
013-17 Earle 135 90 45 0
013-18 Saber 135 90 45 0
013-19 Jefferson 135 105 45 0
013-20 CL 121 135 90 45 0
013-21 CL 141 135 90 45 0
013-22 Rice Tec XL6 75 45 0 30
013-23 Rice Tec XL7 120 90 0 30
013-24 Lagrue 135 90 45 0
013-25 Drew 135 90 45 0
013-26 Ahrent 150 105 45 0
013-27 Bengal 150 105 45 0
013-28 MedArk 135 90 45 0
013-29 CL 161 135 90 45 0
013-30 Cocodrie 150 105 45 0
013-31 Cybonnet 150 105 45 0
013-32 Cheniere 150 105 45 0
013-33 Wells 150 105 45 0
013-34 Banks 150 105 45 0
013-35 Francis 150 105 45 0
013-36 Rice Tec XL8 120 90 0 30
013-37 Rice Tec CL XL8 120 90 0 30
013-38 Rice Tec XP710 120 90 0 30
013-39 Rice Tec XP716 120 90 0 30
013-40 Rice Tec XL723 120 90 0 30
013-41 CL 131 135 90 45 0
013-42 Spring 135 90 45 0
013-43 Jupiter 150 105 45 0
013-44 Trenasse 150 105 45 0
013-45 Presido 135 90 45 0
013-46 Rice Tec CL XL730 120 90 0 30
013-47 Pirogue 135 90 45 0
013-48 CL 171-AR 135 90 45 0
013-49 Rice Tec CL XL729 120 90 0 30
013-50 Rice Tec XP744 120 90 0 30
013-51 Rice Tec CL XL745 120 120 0 30
013-52 Bowman 135 90 45 0
013-53 Arize 1003 90 60 0 30
013-54 Catahoula 150 105 45 0
013-55 CL151 120 75 45 0
013-56 JES 120 75 45 0
013-57 Neptune 135 90 45 0
013-58 RiceTec CL XL 746 150 120 0 30
013-59 Taggart 150 105 45 0
013-60 Templeton 135 90 45 0
013-61 CL 111 150 105 45 0
013-62 CL 142 AR 150 105 45 0
013-63 CL 181 AR 135 90 45 0
013-64 CL 261 135 90 45 0
013-65 Jazzman 135 90 45 0
013-66 Rex 150 105 45 0
013-67 Roy J 135 90 45 0
013-68 CL152 150 105 45 0
013-69 CL162 135 90 45 0
013-70 Caffey 135 90 45 0
013-71 Jazzman 2 135 90 45 0
013-72 Antonio 135 90 45 0
013-73 Mermentau 150 105 45 0
013-74 Colorado 135 90 45 0
013-75 Della 2 135 90 45 0
013-76 RiceTec XP4523 120 90 0 30
013-77 RiceTec XP4534 120 90 0 30
013-78 RiceTec XL753 150 120 0 30
013-79 LaKast 150 105 45 0
013-80 CL163 150 105 45 0
013-81 CL172 150 105 45 0
013-82 CL271 150 105 45 0
013-83 XL760 150 120 0 30
013-84 Diamond 150 105 45 0
013-85 Titan 150 105 45 0
013-86 CL153 150 105 45 0
013-87 CL272 150 105 45 0
013-88 RT7311 CL 150 120 0 30
013-89 Gemini 214 CL 150 120 0 30
013-90 Thad 150 105 45 0
013-91 PVL01 150 105 45 0
013-92 PVL02 135 90 45 0
013-93 CLL15 150 105 45 0
013-94 CLM04 150 105 45 0
013-95 RT7301 150 120 0 30
013-96 RT7321 FP 150 120 0 30
013-97 RT7501 150 120 0 30
013-98 RT7521 FP 150 120 0 30
013-99 Jewel 150 105 45 0
013-100 Lynx 135 90 45 0
013-101 Aroma 17 150 105 45 0
013-102 CLL16 150 105 45 0
013-103 CLL17 135 90 45 0
013-104 ProGold1 150 105 45 0
013-105 ProGold2 150 105 45 0
013-106 DG263L 135 90 45 0
013-107 Aroma 22 150 105 45 0
013-108 CLL18 150 105 45 0
013-109 Ozark 150 105 45 0
013-110 PVL03 150 105 45 0
013-111 Taurus 150 105 45 0
013-112 RT7302 150 120 0 30
013-113 R7331 MA 150 120 0 30
013-114 R7401 150 120 0 30
013-115 RT7421 150 120 0 30
013-116 RTv7231 MA 150 105 0 45
013-117 CLL19 150 105 0 45
013-118 DG353M 150 105 0 45
013-119 ProGold M3 150 105 0 45
013-120 PVL04 150 105 0 45
013-127 Other Variety 0 0 0 0

All above N rates are for rice grown on silt and sandy loams (Texture 1 – 3) following soybean in rotation.