According to the recently released National Food Plan, it is estimated that a whopping 30 to 50 per cent of all food produced on the planet is not eaten. In Australia, on average each person generates roughly 360 kilograms of food waste every year.
These figures are staggering. In order to feed an ever growing population, we cannot just continue to strive for greater production efficiencies without ignoring the issue of food waste.
There are various reasons for food wastage that occur. For many of us, food that goes off in our refrigerator before we get to eat it or left-overs from restaurants that get discarded are the obvious ones.
However a significant degree of waste is also occurring as a by-product of our seemingly insatiable demand for fresh produce that looks perfect, has consistent eating quality and is of perfect size and colour. Much of this waste is not even taken into account in the quoted figures above!
Fresh produce that does not meet a required specification is often discarded before it even leaves the field. Perfectly good food is rejected for a minor blemish or for being the wrong colour, size or shape.
Further, growers are having to go to extraordinary lengths to produce this “perfect” produce; investing heavily in complex growing systems and fighting a battle they can never win completely to iron out the “imperfections” of nature. It takes a lot of effort and costs a lot of money to grow the perfect piece of fruit and vegetable. It takes even more effort to grow an entire field of exactly the same perfect fruit or vegetables.
I would like to share the story of how Australia’s apple growers are tackling this challenge.
Right now as we move into winter, apple growers around the country are beginning a year-long challenge of fruit production. They are taking care of post-harvest nutrition to ensure that the trees have plenty of reserves as they go into dormancy. They are also beginning the process of winter pruning, which goes on for many months. Every single tree in an orchard is pruned by hand. Pruning is a complex science and also an art form that sets down the shape of the tree for the coming year, its vigour and how many pieces of fruit will be carried by each tree. Every tree may be pruned several times over to achieve the desired result. It is one of the most fundamental processes in a commercial apple orchard, but also one of the most labour intensive. Modern orchards are planted at very high tree densities and dwarfing rootstocks to enable greater control over tree vigour and allow for pruning trees to a shape that allows for even light distribution throughout the canopy. This is critical in achieving even colour distribution and fruit ripening.
The amount of fruit that each tree carries directly affects the size of the fruit. So this is a key consideration in all orchard activities. For example, growers strive to grow a Pink Lady apple of a 75 mm diameter, because this has been shown to be the size of apple that consumers are looking for. Apples significantly bigger or smaller than this just won’t sell as well.
As we head into spring and the first blossoms appear, some growers may also consider a process of root pruning, where the tree roots are gently ripped to reduce tree vigour and improve consistency of yields from one year to the next. Bee hives are introduced into orchards to assist with pollination. Good pollination is critical in achieving target yields and the target number of fruit per tree.
Then growers assess the numbers of flowers and viable fruit buds. On many trees, various methods of fruit thinning are then required to reduce the crop load. This is usually achieved through a mixture of chemical applications of plant hormones to induce some shedding, followed up by hand thinning. This is another manual process that occurs during spring, where excess fruit is individually picked off each tree and thrown onto the ground.Through the season, growers then continually monitor and assess the growth of their trees as well as the size of the fruit. Often, growers will go through and do a summer prune to remove excess canopy that is shading the fruit – another manual process.
Growers also closely monitor pests and diseases and use integrated pest management techniques to minimise any damage to fruit. In the heat of summer, sunscreen may even be applied in periods of extreme heat to minimise the effects of fruit sunburn (a special food-safe fruit sunscreen)! Often extremely expensive netting structures are used to avoid damage from birds.
Closer to harvest, if fruit size is a problem growers will adjust their water and nutrient management accordingly, and also may consider a second hand-thinning. Many growers also roll out a reflective matting onto the ground surface that helps reflect light into the lower canopy and improve evenness of fruit colour.
At harvest, all picking is done by hand, to ensure fruit is not bruised or damaged. At this point, any obviously blemished, pale, misshapen or poorly sized fruit is discarded straight onto the ground. Fruit is picked at the correct ripeness for its storage needs, then immediately cooled as quickly as possible to ensure it is maintained at optimum freshness. Fruit that is identified to be at risk of not storing well will be sold straight away. Fruit that is to be stored for longer will be kept in high tech cool rooms where gas levels and moisture levels are controlled to ensure maximum fruit quality after storage.
At the point of packing, growers have to aim for at least a 90% pack out rate. This means that at least 90% of the fruit they supply to the pack house will be sold as first grade fruit. As much as possible of this fruit needs to be of the optimum size range to get the best returns. Any lower pack out rate, or if they get the sizing wrong, they will be losing money. The returns on second grade fruit going to juice or processing just aren’t enough to tip this balance.All their activities throughout the year are targeted towards providing a product that is deemed in demand by the general consumer. What is referred to in industry as the “mars bar fruit” – something that looks and eats exactly the same every time, no matter what part of the tree or orchard it comes from.
This story is not unique to the apple industry. It is across all fresh fruit and vegetable production.
So the question becomes is all this effort and in-field wastage really necessary? Further more, by the very essence of demanding consistency of product, are we as a result creating a more mediocre eating experience? Are we providing a consistently good product, but missing out on the surprise experiences that occur through natural variability and complexity.
Are we jeopardizing the very variability that is essential to natural order and life? Are we missing the chance natural genetic mutations that may provide new opportunities for further exciting eating experiences?
What are your thoughts? What do you look for when you go to buy your fruit and vegetables?