By Patrick Hannon, Business Development Manager at Green Rabbit
Potatoes are one of the most produced crops globally. Nations rely on a healthy supply of potatoes to augment the food supply. When potatoes aren’t delivered in edible condition, the economy suffers in a range of areas. But significant amounts of potato crops never reach a customer’s table due to spoilage and post-harvest damage. Implementing cold chain logistics lessens that by controlling temperatures and humidity from farm-to-fork. Potato professionals who understand these processes have a shorter path to less loss and bigger margins.
Why Temperature Control Starts At Harvest
Potatoes degrade from the time they are harvested from the field. Field heat needs to be cooled before placing potatoes into storage. Quick cooling using forced air reduces respiration. It also minimizes starch degradation into sugar. Degradation of starch will affect the texture and taste of fresh-market and processed potatoes. Bruising and weight loss will increase if crops are cooled too slowly by the grower.
Cooling is followed by curing. Potatoes typically need about two weeks in warm, humid conditions to heal minor wounds they received during harvest and processing. Skip curing and your product is more susceptible to rot during prolonged storage. Schedule your cold chain logistics around curing as a separate step, not something that is jammed in before shipping.
Storage Conditions That Keep Potatoes From Sprouting Too Soon
The biggest return on cold chain discipline is realized during long-term storage. Fresh-market potatoes are usually kept around 38-45 degrees Fahrenheit. Potatoes for frying or chipping will generally require higher temperatures in order to avoid too much sugar accumulation, which darkens fried products. Temperature ranges that are too high or too low can cause an entire stored batch to go out of spec for its market in a matter of weeks.
Humidity doesn’t take a back seat when it comes to environmental management. Maintaining storage rooms at 90 to 95 percent relative humidity also slows moisture loss through the skin, and this prevents tubers from becoming shriveled and rubbery instead of crisp and firm. Airflow management plays a part as well. Consistent moving air passing through stacked bins helps prevent any section of the pile from warming or drying out more quickly than the rest.
Sprouting is another issue. Potatoes are not dead, and once they break dormancy, they begin to draw carbohydrates (stored starch) to feed developing shoots. This results in a rapid loss of both weight and quality. Cold storage greatly inhibits sprouting compared to leaving them at room temperature. It allows growers and packers more months of usable product without using many sprout inhibitors.
Transportation And The Risk Of Dehydration And Freezing Damage
Trucks and rail cars that are not insulated or refrigerated subject potatoes to temperature fluctuations that warehouse rooms were designed to eliminate. A vehicle can exit a cold, humid warehouse with a shipment in ideal condition and arrive with it dried out or partially frozen when the trailer’s temperature isn’t properly set for the journey.
Freezing damage deserves special mention as it can go unnoticed until the goods thaw. Ice crystals that develop within a potato crack cell walls. When the tuber rewarms, it becomes soft and discolored. No one will knowingly buy mushy potatoes for human consumption. This loss often doesn’t occur until further down the supply chain. It could be at the consumer level, the grocery store shelf itself.
Frozen potato products are not immune to this issue either. Finished products such as french fries need to stay at or below 0 degrees Fahrenheit as they come off the production line. Hash browns and other frozen ready-to-heat potato goods need to follow suit. Even a short period of temperature abuse during loading or transfer can begin the process of partial thawing and refreezing, which changes the makeup of ice crystals and leads to a soggy finished product. Knowledgeable distributors allow for padding time and hard cold storage at every stage of transfer rather than pushing frozen loads like refrigerated fresh produce.
The Role Of A Frozen Food Fulfillment Center In Preventing Loss
Frozen food fulfillment centers offer processors and distributors an opportunity to outsource to a temperature-controlled environment designed around non-stable products. These warehouses maintain stable, below-zero temperatures for inventory storage, as well as temperature-controlled picking and packing operations that limit the time product is exposed to room temperature to several minutes. This type of environment is ideal for smaller distributors and regional brands who lack their own cold storage facility network.
A good frozen food fulfillment center also practices rotation of inventory, ensuring older products are shipped before newer products enter the warehouse. This limits the chance for older inventory to stagnate. Quicker and more accurate fulfillment lessens the amount of time potatoes spend out of deep-freeze temperatures overall. The less time potatoes are handled, the better. Potato processors who service both retail and food service can minimize shrink that would typically be written off or returned by utilizing a potato facility that specializes in these practices.
Monitoring And Consistency Across The Cold Chain
Temperature sensors and tracking technology are standard practice across cold chain logistics. The potato industry utilizes them just as any other perishable commodity would. Rather than finding out at delivery, teams are alerted within minutes if there’s a bad refrigeration unit or a trailer door not sealed properly. Awareness of who is accountable for each handoff also takes the guessing game out of where something may have lost quality.
Much of cold chain breakdown happens at the transition between handoffs, even when each segment of the supply chain performs exceptionally by itself. Product could spend perfect days inside a warehouse only to sit for 20 minutes on an uncooled dock while switching drivers. Minutes like those accumulate during a shipment. Reducing them depends on growers, storage operators, and transportation providers communicating and acting as a single unit.
Information gathered during this process also allows operators to improve practices over the long term. Clustering of temperature excursions can identify a particular route or repeated equipment malfunction. Companies have actual data to address rather than feeling like something “might” be wrong. Over multiple seasons, this has the effect of reducing the overall amount of product lost to preventable temperature excursions.
Sustainability And Reduced Loss Across The Broader System
Saving potatoes from spoilage benefits the environment long beyond the supply chain stage as well. A potato wasted equals water, fertilizer, and manpower expended for nothing. When discarded improperly and buried in a landfill, waste doesn’t biodegrade cleanly. Organic matter decomposes and emits methane, which has a higher warming potential than carbon dioxide in the short term.
Cold chain supply solutions minimize waste before it occurs by preserving a greater percentage of the harvested crop. Not only does reducing spoilage mean wasting less product, but it also reduces the amount of replacement shipments that bring their own transportation footprint. Preventing loss with upgraded refrigeration and infrastructure, such as a frozen food fulfillment center, protects your profits and allows a broader supply chain to waste less energy.
Building A More Resilient Potato Supply Chain
None of this occurs because of one upgrade or piece of new equipment. Eliminating waste during fresh and frozen potato distribution means approaching temperature control as one long, never-ending responsibility from harvest to final destination. There are risks at every phase, and each phase demands attention unique to that link in the chain.
Potato industry professionals focused on cold chain consistency usually realize the rewards of fewer reject loads and more consistent partnerships within the retail and food service markets. Their investment rarely receives much fanfare. It’s reflected in reduced shrink percentages and improved product quality at the sale point, helping to keep one of the world’s most crucial crops from losses that precise temperature control can eliminate.
Author Bio: Patrick Hannon is a Business Development Manager at Green Rabbit. He specializes in driving growth and strategic partnerships. Hannon is a seasoned professional in the cold chain logistics industry, with three years of experience.
Discover more from Potato News Today
Subscribe to get the latest posts sent to your email.
