Attachment 2- Statement of Work (SOW).pdf

UNITED STATES DEPARTMENT of AGRICULTURE

AGRICULTURE RESEARCH SERVICE

CONSERVATION and RESEARCH LABORATORY 2300 Experiment Station Road

Bushland, Texas, 79012

20 February 2026

Summary of Procurement Request for a Service

Requirement Name: Chemical Analysis for 192 plant samples and 256 soil samples Suggested Method of Procurement: Sole Source POC: William Willis, Agronomist Email: will.willis@usda.gov

Cell: 806-570-0665 Prior Contract: N/A Required Delivery Date: 30 Days after Award

Statement of Work:

Soil Chemical and Plant Nutritional Sample Analysis

General Information:

1. Background and Purpose: The USDA, Agricultural Research Service (USDA-ARS) located at the Conservation and Production Research Laboratory (CPRL), 2300 Experiment Station Road, Bushland, Texas 79012 requires soil chemical analysis on 256 dried, not ground, soil samples and plant nutritional analysis on 192 dried and ground plant samples collected from the 2025 growing season of the Manure Priming Project research study. 2025 was the third season of a 10-year study.

2. Definitions:

1. USDA: Unites States Department of Agriculture

2. ARS: Agricultural Research Service

3. CPRL: Conservation and Production Research Laboratory

4. SOW: Statement of Work

5. LNMRU, Livestock Nutrient Management Research Unit

6. ICP-AES, Inductively Coupled Plasma – Atomic Emission Spectroscopy

7. FIA, Flow Injection Analyzer

8. QA/QC, Quality Assurance/Quality Control data reliability indicators generated by an industry recognized program mailto:will.willis@usda.gov

CONSERVATION and RESEARCH LABORATORY

CONTRACTOR REQUIREMENTS:

3. Technical Requirements/Tasks:

a. 256 dried, but not ground, soil samples are presented for analysis for all soil tests listed in table-1. Samples are numbered 1 through 256. Sample numbers may be used to report results. Cost must include grinding of delivered sample.

b. 192 Dried and ground plant samples are presented for analysis for of all tests listed in table-2. Samples are numbered 1through192 in marker on the sample bag. Sample numbers may be used to report results.

c. Report soil and plant analysis in separate documents.

d. All results must be reported as % dry weight or mg/kg (ppm) on a dry weight basis unless specified differently below:

e. As cited in Tables 1 and 2, all methods must be equivalent to those listed below:

Reference No. 1: North Central Regional Research Publication No. 221 (Revised), Recommended Chemical Soil Test Procedures for the North Central Region. Revised January 1998, corrected February 2011.

Reference No. 2: Bremner and Mulvaney. 1982. Total Nitrogen. P. 595-624. Section 31-

3. Regular Kjeldahl Method. In A.L. Page et al (eds). Methods of Soils Analysis. Part 2.

Chemical and Microbiological Properties. 2nd. Ed. Agronomy Monograph 9. ASA.

Madison, WI.

Reference No. 3: Soil Nitrate Nitrogen. Method S-3.10. In Gavlak, Horneck, and Miller

(eds). 2005. Soil, Plant, and Water Reference Methods for the Western Region. WREP-

125. 3rd ed., p. 65-66.

Reference No. 4: National Forage Testing Association. 1993. 2.2.1.1. Partial Dry Matter

Using Forced Air Ovens. NFTA Forage Analysis Procedures. www.foragetesting.org

Forage Analysis Procedures. National Forage Testing Association. 1993 (amended 2002).

National Forage Testing Association. Omaha, Nebraska

Reference No. 5: Mills and Jones. 1996. Table 5-2. Wet acid digestion procedure using nitric acid and 30% hydrogen peroxide. P. 122. Plant Analysis Handbook II. Micromacro Publishing Inc. Athens, GA.

Reference No. 6: AOAC International. 2012. AOAC Official Method 990.08. Official

Methods of Analysis of AOAC International. 19th ed. G. W. Latimer, Jr. (Ed).

Gaithersburg, Maryland.

Reference No. 7: AOAC International. 2012. AOAC Official Method 990.03 Protein

(crude) in animal feed. Combustion method. Official methods of analysis of AOAC International. 19th ed. G.W. Latimer, Jr. (Ed). Gaithersburg, Maryland.

http://www.foragetesting.org/

CONSERVATION and RESEARCH LABORATORY

Reference No. 8: Gavlak, Horneck, and Miller. 2005. Extractable potassium, nitrate, ammonium, orthophosphate and chloride of botanical materials. B-3.10. p. 157-159. In Soil, Plant, and Water Reference Methods for the Western Region. WREP-125. 3rd. ed.

Reference No. 9: Ankom. 2006. Ankom Technology Method 5. Acid detergent fiber in feeds. Filter bag technique. Ankom Technology. Macedon, New York.

Reference No. 10: Ankom. 2006. Ankom Technology Method 6. Neutral detergent fiber in feeds. Filter bag technique. Ankom Technology. Macedon, New York.

Reference No. 11: AOAC International. 2005. AOAC Official Method 943.01 Chlorine

(soluble) in animal feed. Official methods of analysis of AOAC International.

Reference No. 12: AOAC International. 2005. AOAC Official Method 942.05 Ash of

Animal Feed. Official methods of analysis of AOAC International. 19th Ed. (2012)

CONSERVATION and RESEARCH LABORATORY

Table 1 - Soil Analyses List

Moisture Content o Gravimetric analysis, oven drying at 105°C for 24 hours o Units: % ±0.1

Soil pH in 1:1 (Soil: Water) Aqueous Solution o Using electronic pH electrode per method in Reference No. 1, page 13 o Units: pH units ±0.1

Soil Electrical Conductivity in 1:1 (Soil: Water) Aqueous Solution o Using electronic conductivity cell per method in Reference No. 1, page

59.

o Units: mmhos/cm ±0.1

Soil pH in 1:1 (Soil: Water) Aqueous Solution o Using electronic pH electrode per method in Reference No. 1, page 13

Units: pH units ±0.1 Total Kjeldahl Nitrogen o Using potassium sulfate – cupric sulfate catalyst and distillation-titration method per Reference No. 2.

Mehlich 3 Extractable Phosphorus and Other Elements o Phosphorus, Potassium, Calcium, Magnesium, Sodium, Sulfur, Boron, Copper, Zinc, Iron, Manganese o Using Mehlich 3 extracting solution per Reference No. 1, page 23-25.

o Concentrations to be measured by inductively coupled plasma - atomic emission spectroscopy (ICP-AES) o Units: mg/kg ±1.0

Organic Matter o Using Weight Loss on Ignition Method, at 360°C for 2 hours, per

Reference No. 1, page 53-58.

o Units: % ±0.1

Olsen Extractable Phosphorus o Using Olsen (sodium bicarbonate) extracting solution per Reference No.

1, page 25-26.

o Units: mg/kg ±1.0

Nitrate-Nitrogen o 1M KCl Extraction with cadmium reduction flow injection analyzer (FIA) technique o Using method per Reference No. 3, page 59-60.

Ammonium-Nitrogen o 1M KCl Extraction with indophenol blue flow injection analyzer (FIA) technique o Using method per Reference No. 3, page 65-66

Chloride o Using calcium nitrate extraction with flow injection analyzer (FIA) technique per Reference No. 1, page 49-50 o Units: mg/kg ±1.0

CONSERVATION and RESEARCH LABORATORY

Table 2 – Plant Tissue/Feed Analysis List

Moisture Content/Dry Matter o Gravimetric analysis. Reference No. 4 method 2.2.1.1.

o Units: % ±0.1

Ash Content (% Organic Matter = total weight minus ash weight) o Using Weight Loss on Ignition. Reference No 12.

o Units: % ±0.1

Mineral Analysis o Calcium, Phosphorus, Magnesium, Potassium, Sulfur, Zinc, Iron, Manganese, Copper, Sodium o Nitric acid and 30% hydrogen peroxide solution digestion per Reference

No. 5 o Mineral concentrations by ICP-AES per Reference No. 8 o Units: % + 0.1 or mg/kg ±1.0

Chloride o 2% acetic acid extraction with cadmium reduction FIA technique o Using method per Reference No. 11 o Units: % ±0.01

Crude Protein o Automated combustion analyzer technique per Reference No. 7 o Units: % ±0.1

Nitrate as N o 2% acetic acid extraction with cadmium reduction flow injection analyzer method per Reference No. 8 o Units: mg/kg ±1.0

Acid Detergent Fiber o Using Ankom method of Reference No. 9 o Units: % ±0.1

Neutral Detergent Fiber o Using Ankom method with α-Amylase Treatment of Reference No. 10 o Units: % ±0.1

CONSERVATION and RESEARCH LABORATORY

4. Deliverable / Schedule:

The results must be sent to Anna.Ortiz@usda.gov within 30 days of receiving samples for analysis.

5. Government Furnished:

The Government will furnish the samples identified.

6. Travel: Not Applicable

7. Contractor’s Key Personnel:

Contractor will provide all required laboratory technicians and ancillary personnel needed to complete all work covered under this contract.

8. Security Requirements: Not Applicable

9. Data Rights: Not Applicable

10. Section 508 – Electronic and Information Technology Standards: Not Applicable

11. Performance Requirement Measures

Performance Objective

Required Task or Deliverable

Performance Standard

Delivery Format

Positive/Negative Incentive % for NOT meeting the Task

Analyses of Soil and plant/feed samples

Within 30 days of sample submission

Report on results of the submitted samples

By email to the submitter

Negative incentive of 15% reduction of rate per sample if results are delivered 35-45 days after submission

Negative incentive of 30% reduction of sample rates if results are delivered 45 days after submission mailto:Anna.Ortiz@usda.gov

6. Travel: Not Applicable