Quantification of Cover Cropping Benefits Of 3 Year Cotton and Peanut Rotation | USDA NRCS CTA SC 18 07

Opportunity Information: Apply for USDA NRCS CTA SC 18 07

The USDA Natural Resources Conservation Service (NRCS) offered a cooperative agreement opportunity titled "Quantification of Cover Cropping Benefits Of 3 Year Cotton and Peanut Rotation" (Funding Opportunity Number USDA NRCS CTA SC 18 07) to generate field-based data on how cover crops perform in a southeastern peanut-cotton-cotton rotation and whether they can measurably improve soils, crop productivity, and farm profitability. The project is positioned as applied research and on-farm style demonstration, with the larger goal of producing credible, locally relevant evidence that can help producers feel confident adopting cover crop conservation systems rather than viewing them as an added cost or management burden.

The core technical focus is to quantify what cover crops contribute agronomically and environmentally. The work begins with measuring cover crop biomass yields and lab-analyzing plant tissue for nutrient concentrations and the carbon-to-nitrogen (C/N) ratio. Those measurements are then used to estimate nutrient credits, specifically applying 189 of the nutrients measured in the prior year cover crop (notably nitrogen and potassium) as a credit against fertilizer needs for the next cash crop. In practical terms, the project is asking whether nutrients captured and recycled by cover crops can partially substitute for purchased fertilizer, and under what conditions that substitution is reliable in southeastern soils.

A major experimental component is the evaluation of nitrogen fertilizer response in cotton following different cover crop scenarios. Cotton nitrogen rates are set at 0, 25, 50, and 100 pounds of N per acre, creating a response curve that helps determine whether cover crops shift the optimal nitrogen rate, improve nitrogen use efficiency, or buffer yield loss when fertilizer rates are reduced. Alongside yield, the project tracks crop growth, dry matter production, and crop nutrition for both cotton and peanuts, so the results go beyond simple harvested yield and can explain why performance changes (for example, improved nutrient uptake, better early vigor, or differences in plant tissue nutrient status).

The opportunity also emphasizes soil function outcomes that matter for resilience and water management. The study is designed to quantify how cover crops affect infiltration, soil moisture, and plant-available soil nitrogen at two depth intervals: 0 to 6 inches and 6 to 12 inches. Measuring these layers helps distinguish surface improvements (often tied to residue cover, aggregation, and reduced crusting) from deeper changes that influence rooting and drought tolerance. By pairing soil moisture and nitrogen availability, the project can address a common producer question: do cover crops tie up nitrogen and reduce cash crop performance, or do they improve nitrogen cycling and availability when managed correctly?

To accomplish this, the project specifies a set of cover crop treatments within the three-year rotation. The cover options include (1) cereal rye, (2) a multi-species mixture of cereal rye, crimson clover, hairy vetch, and daikon radish, (3) cereal rye plus hairy vetch, and (4) a no-cover comparison represented by winter weeds. This set is structured to compare a grass cover (rye), legume inclusion (vetch and clover for biological nitrogen fixation), a diverse mix including a brassica (daikon radish for rooting and potential compaction alleviation), and a realistic baseline where no intentional cover is planted. The nitrogen rate treatments are applied during the cotton phase, ranging from 0 to 100 pounds per acre in 25-pound increments, allowing the project to evaluate interactions between cover crop type and fertilizer strategy.

The design requirements stress statistical credibility rather than one-off demonstration. Plots must be randomized and replicated at least two times, and the study must be conducted on two different soil types representing high and low yield environments. This is meant to ensure the findings are not limited to a single field condition and can speak to variability that farmers routinely face. The announcement also requires statistical analysis to determine whether observed differences among treatments are significant, reinforcing that the project is expected to produce defensible conclusions rather than anecdotal observations.

A second, distinct component examines whether cover crops can be treated as a practical fertilizer source under a standard university recommendation framework. In that component, replicated treatments include: no cover; the mixed cover described above; mixed cover plus Clemson University fertility recommendations; and mixed cover where Clemson recommendations are reduced by 189 of the nutrients measured in the cover crop (again focusing on nutrient crediting from cover biomass). This comparison directly tests nutrient cycling and the feasibility of adjusting fertilizer programs based on measured cover crop nutrient content, which is a key step toward integrating cover crops into mainstream nutrient management planning rather than treating them only as erosion-control tools.

Economics is a required outcome, not an afterthought. The project explicitly calls for evaluating economic returns of cover crop systems versus no-cover systems, which would typically include cover crop establishment costs, any changes in fertilizer inputs due to nutrient credits, impacts on yield and quality, and potentially operational considerations tied to planting and termination. By pairing agronomic and soil metrics with profitability, the intended deliverable is a balanced assessment that can guide real-world decision-making and reduce uncertainty for producers considering adoption.

Administratively, this was a discretionary federal funding opportunity administered by USDA NRCS under CFDA 10.902, using a cooperative agreement instrument, with one expected award up to 200,000. Eligibility was listed as unrestricted (open to any type of entity, subject to any additional eligibility notes in the full announcement). The opportunity was posted June 8, 2018, and originally closed July 27, 2018 at 5 pm Eastern. Overall, the grant is structured to produce regionally relevant, statistically supported evidence on how specific cover crop mixtures and nitrogen management strategies affect cotton and peanut systems, with the aim of turning conservation practice adoption into a more data-driven, economically grounded choice for producers.

• The Department of Agriculture, Natural Resources Conservation Service in the agriculture, environment, natural resources, science and technology and other research and development sector is offering a public funding opportunity titled "Quantification of Cover Cropping Benefits Of 3 Year Cotton and Peanut Rotation" and is now available to receive applicants.
• Interested and eligible applicants and submit their applications by referencing the CFDA number(s): 10.902.
• This funding opportunity was created on Jun 08, 2018.
• Applicants must submit their applications by Jul 27, 2018 5pm EST. (Agency may still review applications by suitable applicants for the remaining/unused allocated funding in 2026.)
• Each selected applicant is eligible to receive up to $200,000.00 in funding.
• The number of recipients for this funding is limited to 1 candidate(s).
• Eligible applicants include: Unrestricted (i.e., open to any type of entity above), subject to any clarification in text field entitled Additional Information on Eligibility.

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