Evaluating Sustainable Packaging and Shelf-Life Extension Techniques for Shelled and In-Shell Pecans in Direct-to-Consumer Marketplaces

Commodities

Practices

The purpose of this project is to test and compare multiple packaging technologies to identify practical, affordable methods that extend the shelf life and maintain the quality of shelled and in-shell pecans for small and mid-sized producers. The proposed solution is a structured on-farm research trial that measures how different packaging materials and sealing techniques perform under real storage and shipping conditions. The research will produce clear, data-driven guidance that farmers can use to improve profitability, reduce waste, and strengthen sustainability across the pecan industry.

The solution is specific and measurable. It evaluates six packaging types for shelled pecans and three packaging types for in-shell pecans. Each packaging method will be tested for its ability to reduce oxidation, control moisture, preserve sensory quality, and withstand shipping and handling stresses. Data will be collected at defined intervals of 0, 3, 6, 9, and 12 months. Measurements will include moisture content, peroxide values, color stability, and sensory panel evaluations. This approach produces quantifiable results that clearly indicate which packaging solutions provide the most sustainable, cost-effective improvement in shelf life.

The solution is achievable and realistic because it uses equipment and materials that are already accessible to small farms. All packaging methods selected can be implemented with low-cost tools, tabletop sealers, and commercially available packaging films. The focus is on identifying options that do not require large capital investment. The project can be fully completed within a one-year testing window and fits within the typical operations of a small pecan farm.

How the proposed solution leads to sustainability:

1. Economic sustainability
   The primary barrier limiting small producers from selling pecans in online and national retail markets is the instability of shelled pecan quality over time. By identifying which packaging options maintain freshness for six to twelve months, the project directly improves farm profitability. Longer shelf life allows farms to reduce losses from spoilage, maintain consistent product quality, and expand sales into higher-value markets.

This project will generate a cost analysis for each packaging method, including material cost per unit and equipment cost. Farmers will be able to choose from several proven options that match their scale and budget. This supports long-term economic resilience, a core requirement of the 1990 Farm Bill definition of sustainable agriculture.

2. Environmental sustainability
   Improper storage leads to pecans becoming rancid, which results in significant food waste. Packaging that extends freshness directly reduces waste and improves resource efficiency. This project includes testing biodegradable or compostable high-barrier films where available. If these materials perform comparably to conventional packaging, they offer a more environmentally responsible option for small producers.

Additionally, identifying packaging that reduces spoilage reduces the need for repeated shipments, replacements, and disposal of failed product, which reduces environmental impact across the supply chain. Improving product stability improves the efficiency of energy and materials already invested in orchard production.

3. Quality of life and community sustainability
   Small pecan farms are deeply embedded in Southern rural communities. Improving shelf life and product quality allows these farms to secure higher margins, build stronger customer relationships, and grow their businesses in ways that support jobs and local economies. The results of this project will be shared through outreach activities including field days, online resources, and collaboration with growers and extension agents. This ensures that the knowledge reaches a wide audience and benefits more than one operation.

Clear guidance on packaging reduces uncertainty and lowers the barrier for farmers who want to participate in direct-to-consumer markets. This increases economic opportunities for rural communities and creates a pathway for younger or beginning farmers to enter the industry more successfully.

Project activities:

1. Test packaging materials
   Shelled pecans will be packaged using six methods including poly bags, vacuum sealing, nitrogen flushing, oxygen absorbers, high-barrier laminated pouches, and compostable barrier films. In-shell pecans will be packaged using three methods including mesh bags, breathable paper-shell bags, and semi-permeable barrier pouches.

2. Simulate real storage and shipping conditions
   Samples will be stored under four conditions representing typical e-commerce and warehouse environments: climate controlled (70 degrees), warm warehouse (80 to 95 degrees), high humidity (60 to 70 percent relative humidity), and shipping simulation using vibration and transport.

3. Collect data at five intervals
   Each package type will be evaluated at 0, 3, 6, 9, and 12 months. Data collection includes moisture content, peroxide values, color, and sensory evaluations.

4. Analyze data and produce recommendations
   Data will be compiled to compare the performance, cost efficiency, and environmental impact of each packaging type. The goal is to identify the top two or three packaging methods that provide best-in-class shelf life improvement for small Southern pecan farms.

5. Share results with the farming community
   Results will be presented through a farm field day, a downloadable report, a simple decision guide for growers, and outreach to Georgia Grown members and pecan grower organizations.

Conclusion

This project provides a practical, research-based solution to a widespread challenge in the Southern pecan industry. By identifying packaging methods that extend shelf life without requiring expensive equipment, the project moves small farms toward greater economic stability, reduced waste, and improved quality of life. The outcomes will directly support the goals of the 1990 Farm Bill definition of sustainable agriculture and align with Southern SARE's mission to advance farmer-driven innovation.

This project will use a controlled on-farm research design to evaluate how different packaging materials and sealing methods affect the shelf life, quality, and stability of shelled and in-shell pecans stored under realistic e-commerce and warehouse conditions. The methods follow the basic principles outlined in the SARE bulletin on conducting research on farms, including control treatments, replication, defined sampling intervals, and consistent data collection procedures.

Project Site

All packaging, storage, and testing will be conducted at Eason Orchard and Worth Pecan Company in Poulan, Georgia. The site includes a climate-controlled workspace for packaging, a dry storage area for environmental simulations, and adequate space for organizing samples. The farm setting allows realistic workflow, handling, and storage practices that reflect real pecan processing conditions used by small Southern growers.

Research Design

The project will evaluate six packaging treatments for shelled pecans and three packaging treatments for in-shell pecans. Each packaging type will have three replicate samples per storage environment and sampling interval. This produces a consistent experimental structure that allows comparison across treatments and reduces the influence of variability in the product.

Shelled pecan packaging treatments:

1. Standard polyethylene bag (control)

2. High-barrier laminated pouch

3. High-barrier laminated pouch with oxygen absorber

4. Vacuum-sealed pouch

5. Nitrogen-flushed pouch

6. Compostable high-barrier film

In-shell pecan packaging treatments:

1. Mesh produce bags

2. Breathable paper-shell bags

3. Semi-permeable barrier pouch

Storage and Environmental Conditions

To simulate realistic conditions that pecans experience during warehouse storage and online fulfillment, samples will be stored under four conditions:

1. Climate-controlled environment at approximately 70 degrees Fahrenheit

2. Warm warehouse conditions ranging from 80 to 95 degrees Fahrenheit

3. High-humidity conditions at 60 to 70 percent relative humidity

4. Shipping simulation involving vibration, physical handling, and temperature fluctuations created by periodic transport of packages through standard carrier services

Samples will be labeled, cataloged, and placed into designated storage areas with consistent organization. Temperature and humidity will be monitored using digital hygrometers and thermometers placed near the samples.

Packaging Process and Materials

Pecan samples will be cleaned, sorted, and prepared in consistent quantities for each treatment. Packaging equipment will include:
• a tabletop vacuum sealer
• a nitrogen flushing attachment
• heat sealing equipment
• commercially available high-barrier pouches
• compostable barrier film
• mesh and breathable bags
• oxygen absorber packets

All materials will be food grade and easily accessible to small farms.

Sampling Intervals and Measurements

Measurements will be taken at 0, 3, 6, 9, and 12 months. At each interval, samples will be opened and evaluated using both laboratory analysis and sensory evaluation. Measurements will include:

1. Moisture content. Samples will be evaluated using a moisture meter or laboratory testing to determine water activity levels, which influence texture and microbial stability.

2. Peroxide value. This is an indicator of oxidative rancidity and is commonly used in nut shelf-life research. A certified laboratory or extension service will analyze these values.

3. Free fatty acid levels. These measurements provide additional insight into lipid degradation over time.

4. Color evaluation. Visual color scoring will help detect browning or darkening that results from oxidation.

5. Sensory evaluation. A small taste panel of 8 to 10 individuals will score aroma, flavor quality, off-flavors, and texture. Each trait will be rated on a numerical scale to allow comparison across time and packaging types.

6. Packaging durability. During the shipping simulation, packaging will be evaluated for seal failures, punctures, or deformation.

Data Collection and Organization

All sample results will be recorded in spreadsheets that track:
• sample identification number
• packaging type
• storage environment
• sampling interval
• lab results
• sensory scores

Photos of sample conditions will also be taken during each sampling interval to supplement the data.

Methods of Data Analysis

Data will be analyzed by comparing the mean values of each measurement for each packaging type across time intervals. Trends in peroxide value, moisture content, and sensory ratings will be plotted to show changes over time. Packaging types that maintain lower peroxide values, stable moisture levels, acceptable color, and higher sensory ratings will be identified as successful treatments.

Comparisons will be made between:
• treated samples and the control
• packaging performance under different environments
• shelled versus in-shell stability

Statistical analysis will primarily involve comparing averages and observing rate of change across time. While this is a farmer-led study, the design is structured to allow meaningful interpretation and reliable conclusions based on observed differences.

Evaluation of Results

A successful packaging treatment will be one that:
• slows the increase of peroxide values
• maintains or minimally changes moisture content
• preserves positive sensory scores
• prevents visible quality deterioration
• remains intact through shipping simulations
• has a reasonable cost per unit for a small producer

Results will be compiled into a summary table that ranks packaging options by overall performance, cost, and environmental considerations. This will allow small farmers to choose options that match their needs and budget.

Conclusion

This methodical, structured approach allows the project to generate reliable, practical information on how packaging affects pecan shelf life under real-world conditions. By testing multiple packaging types, controlling environmental variables, measuring key indicators of quality, and using consistent data collection methods, the project will produce meaningful results that farmers can use to improve their economic sustainability and reduce waste.