Turning Farm Waste Into Organic Fertiliser: Pilot Results

Fresh Del Monte Produce has been testing how agricultural residues can return value to the farms that generate them. The pilot programme used suitable farm waste—such as plant material, fruit residues and other biodegradable by-products—to produce an organic fertiliser for selected growing areas. The aim was practical: reduce waste, improve soil health and lower reliance on externally supplied inputs.

The results offer a useful example of circular agriculture in action. Early field observations indicate that the material can support soil structure, contribute nutrients and fit into existing farm routines when it is carefully processed and applied. The programme also provided lessons about quality control, water management and the conditions needed to expand this approach responsibly across different regions.

Why The Pilot Was Developed

Fresh Del Monte’s farms generate organic residues as part of normal cultivation and harvesting. Leaves, stems, rejected produce and other plant matter have traditionally required collection, transport or separate treatment. Converting these materials into a soil amendment creates a pathway for keeping nutrients within the agricultural system.

The approach also responds to several sustainability priorities at once. It can reduce the volume of waste sent away from farms, limit the need for some manufactured fertiliser inputs and help rebuild soils that are repeatedly cultivated. The pilot was designed to examine whether these potential benefits could be achieved without compromising crop performance, food safety or operational efficiency.

The programme was especially relevant in tropical growing areas, where warm conditions can support biological decomposition. However, climate alone does not guarantee a successful outcome. The quality of the finished product depends on the materials selected, the composting or processing method, moisture levels, maturity and the way the fertiliser is distributed in the field.

From Residues To A Usable Soil Input

The process began with the separation of suitable organic material from items that could contaminate the final product. Farm residues were then managed under controlled conditions so that they could break down into a more stable material. Regular monitoring helped the teams track moisture, temperature and consistency during the treatment process.

A mature organic fertiliser should have a more uniform texture and a lower risk of further rapid decomposition after application. That stability matters because immature material can compete with plants for nitrogen, create odours or produce uneven results. The pilot therefore treated preparation and testing as essential parts of the agricultural input, rather than as an afterthought.

The finished material was applied in selected plots at carefully considered rates. This allowed farm teams to compare soil conditions and crop responses with areas managed under existing practices. The pilot was intended to complement sound agronomy, including crop nutrition plans, irrigation scheduling and ground-cover management, rather than replace professional field assessment.

What The Field Results Revealed

The pilot produced encouraging results in several areas. Treated organic fertiliser helped add organic matter to the soil and supported a crumbly structure in application zones. That structure can improve the movement of air and water through the root area, particularly where repeated machinery movement or heavy rainfall has reduced soil porosity.

Field teams also observed that the material could help retain moisture for longer between irrigation events. This does not remove the need for accurate irrigation, but it may give crops a more stable root environment. In warm agricultural regions, even small improvements in soil moisture management can support more resilient production during periods of high evaporation.

The results were not identical in every plot. Response depended on soil type, application rate, crop stage and local weather. This variation was valuable because it showed where adjustments were needed. A circular input is useful only when it performs reliably enough for growers to apply it with confidence and when its benefits can be measured over more than one season.

Measuring Soil, Water And Carbon Benefits

The pilot’s soil observations sit within broader work to understand the role of agricultural land in climate and ecosystem management. Fresh Del Monte’s work on soil carbon mapping provides a wider context for assessing how soil practices may influence carbon storage across Costa Rican plantations.

Organic fertiliser can support soil carbon by returning plant-derived material to the ground. The actual outcome depends on how much carbon remains in the soil, how quickly it decomposes and how the land is managed over time. For that reason, the programme focused on repeatable measurements rather than treating a single application as proof of a permanent carbon benefit.

Water management was another important consideration. Better soil structure can reduce runoff and improve infiltration, but the fertiliser itself must be free from unwanted residues and applied in a way that protects waterways. The same principle applies to filtration and irrigation infrastructure: chemical-free filtration demonstrates how water protection can be approached through careful system design and reduced chemical dependence.

Lessons For Farm Operations

One of the clearest findings was that circular agriculture requires coordination across multiple teams. Agronomists, waste-management staff, machinery operators and quality specialists all influence the final result. Collection points must be accessible, processing areas need appropriate safeguards and application equipment must be capable of handling the material evenly.

The pilot also reinforced the importance of traceability. Each batch should have a record of its source materials, processing conditions, test results and destination field. This information helps identify why performance differs between locations and supports responsible decision-making if a batch falls outside the required quality range.

Practical learning from the programme included:

• Separating clean plant residues early improves input quality.
• Consistent moisture control supports more even processing.
• Application rates should reflect soil and crop conditions.
• Follow-up sampling is needed to track long-term effects.

These measures also help protect workers, nearby communities and surrounding ecosystems. Organic does not automatically mean risk-free; poorly managed biological material can carry pathogens, weed seeds or excess nutrients. Responsible use depends on testing, hygiene and compliance with applicable agricultural and environmental requirements.

Relevance For Australian Food And Farming

The pilot has clear relevance for Australian consumers and supply chains, even when the fieldwork takes place overseas. Shoppers in Sydney, Melbourne, Brisbane and Perth increasingly look for food produced with lower waste and more responsible resource use. Fresh produce sold through Australian supermarkets and independent grocers is judged on freshness, quality, provenance and the credibility of sustainability claims.

The approach also reflects realities familiar to Australian growers. Farms may need to manage intense summer heat, irregular rainfall, water restrictions or sudden heavy rain. In Queensland, seasonal humidity can affect how organic materials are stored and processed, while growers in southern regions may face different decomposition rates and soil conditions. A method that works well in a tropical plantation still requires local testing before it can be transferred to another climate.

For Australian households, the idea is easy to connect with: food scraps and garden material can become useful resources rather than simply waste. It also aligns with everyday expectations around reducing packaging, limiting food loss and making informed choices for the family shopping basket. Organic fertiliser used in production should not be confused with an automatic organic certification claim for the final fruit. In Australia, such claims must meet relevant standards and be supported by appropriate verification.

Building A More Circular Agricultural Model

The pilot demonstrated that farm waste can become part of a productive loop. Crop residues move through controlled processing, return to the soil and contribute to the conditions needed for future crops. This approach can reduce disposal requirements while making better use of nutrients already present on the farm.

Scaling the model will require evidence over multiple seasons. Important indicators include soil organic matter, nutrient availability, crop quality, water use, production costs and the emissions associated with transport and processing. The programme’s value will be measured by how consistently it performs across farms, not simply by the volume of waste diverted in one reporting period.

The next stage of responsible development is therefore disciplined expansion. Sites need clear operating standards, trained personnel and monitoring that can identify both benefits and unintended effects. Local conditions should guide the decision to adopt the method, with no assumption that one recipe, application rate or processing timetable will suit every agricultural region.

Fresh Del Monte’s pilot using organic fertiliser from farm waste shows how sustainability can be grounded in daily farm decisions. Its most important result is the evidence that residues can be managed as a resource while supporting soil care, water stewardship and operational learning. The point to remember is simple: circular agriculture succeeds when farm waste is safely transformed, carefully measured and returned to the land in a way that strengthens the next crop.