Understanding Food Availability: The Impact of Post Harvest Management on Food Supply

Every year, millions of tonnes of food are produced across the globe – yet a significant portion of it never reaches the people who need it most. The gap between what is harvested and what actually ends up on our plates is shaped not just by how much we grow, but by how well we manage that produce after it leaves the field. This is where food availability and post-harvest management intersect, and understanding this relationship is crucial for tackling food insecurity in a world of rising demand.

What does food availability really mean? 🔗

Food availability refers to the physical presence of sufficient quantities of food – whether through domestic production, imports, food reserves, or aid. It is the first of four pillars of food security, followed by access, utilisation, and stability. In simple terms, no matter how good economic access or dietary habits are, if enough food isn’t physically present in the system, food security cannot be achieved.

Food availability depends on several factors: the volume of agricultural production, how much of it is retained as seed or diverted for animal feed, what gets imported or exported, and – critically – how much is lost between harvest and consumption. Net food availability is calculated by taking total production, subtracting seed requirements, animal feed, wastage, and adjusting for trade balances. Any gap in these elements directly reduces the food that reaches consumers.

The global food production picture 🔗

Global food production has increased substantially over the past several decades, largely driven by the Green Revolution and advances in agricultural technology. Yet, population growth has often outpaced these production gains in many developing regions. The world’s population is projected to reach around 9.7 billion by 2050, and feeding this number will require a roughly 70% boost in food production compared to current levels.

In India specifically, foodgrain production has seen impressive growth since the Green Revolution of the late 1960s. However, between 1990 and 2007, the growth rate of foodgrain production slowed to around 1.2% per year – well below the annual population growth rate of 1.9% during the same period. This mismatch meant that per capita cereal availability actually declined, dropping from a peak of 468 grams per person per day in 1990-91 to about 412 grams by 2005-06.

This trend highlights a key reality: producing more food alone isn’t sufficient. If population growth outstrips production gains, or if large portions of the harvest are lost before reaching consumers, per capita food availability can still fall.

Where does post-harvest management fit in? 🔗

Post-harvest management covers every step of the food supply chain after the crop is harvested – including handling, drying, threshing, cleaning, storage, transportation, processing, and packaging. Each of these stages carries a risk of loss. When any of these steps is handled poorly, the result is a direct reduction in the quantity and quality of food available for consumption.

Globally, the FAO estimates that roughly 14% of food produced worldwide is lost between the farm gate and the retail stage. In developing countries, these losses are even more severe due to limited infrastructure, lack of technology, and insufficient cold chain facilities.

The scale of post-harvest losses 🔗

The numbers are staggering. According to research published in Foods journal, more than one-third of all food produced globally for human consumption is lost or wasted during post-harvest operations. For cereal grains – which form the dietary backbone in most developing nations – storage losses alone can reach 50-60% where scientific storage methods are absent. With proper technology, these losses can be brought down to just 1-2%.

In African countries, post-harvest losses for grains have been estimated at 20-40% of total production. Sub-Saharan Africa alone loses food grains valued at around USD 4 billion every year. For perishable crops like fruits and vegetables, the situation is even worse – losses can reach up to 50% in some developing countries.

India’s post-harvest challenge 🔗

India, despite being one of the world’s largest agricultural producers, faces severe post-harvest losses. Estimates suggest that post-harvest losses for durable crops like cereals and pulses range from 10 to 25%, while for fruits and vegetables, losses can reach 30-40%. According to World Bank estimates, India loses approximately 12 to 16 million metric tonnes of grain every year in post-harvest operations – enough to feed roughly one-third of the country’s poor population.

The root cause of India’s food insecurity, as Statista’s analysis points out, lies not in a shortage of production but in a dysfunctional food distribution system and inadequate post-harvest infrastructure. Poor storage facilities, lack of cold chain networks, and inefficient transportation all contribute to massive waste.

Key causes of post-harvest losses 🔗

Understanding why food is lost after harvest is essential for designing effective interventions. The causes are varied and often interconnected.

Inadequate storage infrastructure 🔗

Storage is the single biggest contributor to post-harvest losses for food grains. In traditional storage systems – open-air heaps, mud bins, jute bags – grain is exposed to moisture, insects, rodents, and fungi. Temperature and humidity fluctuations accelerate spoilage. In countries like Bangladesh, storage losses have been found to account for over 40% of all post-harvest losses for wheat. The lack of modern warehousing, cold storage facilities, and hermetic (airtight) storage technologies in rural areas makes the problem particularly acute for smallholder farmers.

Poor harvesting practices 🔗

The timing and method of harvesting play a critical role. Harvesting too early leads to high moisture content, which increases susceptibility to mould and insect attack. Delayed harvesting, on the other hand, exposes the crop to shattering losses, bird damage, and weather-related risks. A study in Punjab, India, found that delaying wheat harvest increased shattering losses by around 67%.

Transportation and handling deficiencies 🔗

In many developing regions, poor road infrastructure, lack of refrigerated transport, and rough handling during loading and unloading cause significant physical damage and spoilage. For perishable commodities, the absence of a reliable cold chain is particularly damaging. An estimated 526 million tonnes of perishable foods were spoiled globally in 2017 alone due to lack of refrigeration.

Limited processing and value addition 🔗

In India, only about 2.2% of agricultural produce undergoes processing, compared with 65% in the USA and 23% in China. This low level of value addition means a large share of perishable produce spoils before it can be consumed or preserved.

How post-harvest management improves food availability 🔗

Reducing post-harvest losses offers one of the most effective pathways to increase food availability – without needing additional land, water, or inputs for production. Every tonne of food saved from waste is a tonne that can go directly to consumers.

Modern storage technologies 🔗

Hermetic (airtight) storage is one of the most promising interventions for smallholder farmers. These sealed containers – including metal silos, hermetic bags, and cocoon-type storage units – prevent moisture entry, restrict oxygen availability, and stop insect and mould growth. The World Food Programme’s post-harvest loss prevention programme in Uganda demonstrated that improved storage practices and technologies reduced food loss by up to 98%. Participating farmers also increased their income threefold, as better grain quality and the ability to store produce until lean-season prices rise gave them stronger market positions.

This model has since been expanded to countries including Burkina Faso, Tanzania, Zambia, Burundi, Niger, and Rwanda, benefiting over 93,000 smallholder farmers.

Cold chain development 🔗

For perishable commodities – fruits, vegetables, dairy, meat – maintaining a temperature-controlled supply chain from farm to fork is essential. Investments in cold storage at farm-gate level, refrigerated transport, and pack houses can dramatically reduce spoilage. In India, organisations like the National Centre for Cold-chain Development (NCCD) are working to expand this infrastructure, particularly in rural areas.

Improved processing and packaging 🔗

Value addition through processing – drying, canning, freezing, milling – extends shelf life and reduces the volume of food that perishes. Better packaging materials that protect against moisture, oxygen, and physical damage also play a key role. Even simple improvements, such as replacing jute bags with polypropylene or hermetic bags for grain storage, can make a significant difference.

Training and awareness 🔗

Many post-harvest losses stem from a lack of knowledge about proper handling, drying, and storage techniques. Extension programmes that educate farmers on optimal harvest timing, moisture management, and pest control have proven effective. Research by Springer’s Discover Food journal emphasises that tailoring interventions to local conditions – rather than applying one-size-fits-all solutions – is critical for success.

The environmental and economic co-benefits 🔗

Reducing post-harvest losses isn’t just about food – it has significant environmental and economic implications too. When food is wasted, all the land, water, energy, and labour that went into producing it are wasted as well. Post-harvest food losses contribute an estimated 8% of annual global greenhouse gas emissions. By minimising these losses, pressure on natural ecosystems for agricultural expansion is reduced, water resources are conserved, and emissions from decomposing waste decrease.

Economically, the benefits are equally compelling. In India, food worth approximately ₹92,651 crore is lost in post-harvest processes each year. For smallholder farmers – who make up over 80% of India’s farming community – these losses represent not just wasted produce but lost income and reduced livelihood security.

Policy initiatives and the way forward 🔗

Governments and international organisations have recognised the importance of tackling post-harvest losses. SDG Target 12.3 calls for halving per capita food waste and reducing food losses along supply chains by 2030. In India, several schemes aim to address this challenge: the Pradhan Mantri Kisan Sampada Yojana focuses on modernising food processing infrastructure, while the recently launched grain storage plan in the cooperative sector aims to add 70 million metric tonnes of storage capacity.

However, progress has been slow. Effective policy requires coordination across multiple ministries, investment in rural infrastructure, and incentives for private sector participation. Farmer-centric approaches – such as making affordable hermetic storage and cold chain solutions accessible at the village level – remain essential.

Connecting food production to food availability 🔗

It is tempting to think of food availability purely in terms of agricultural output – grow more, and more food will be available. But the reality is more nuanced. Food availability is the net outcome of what is produced minus what is lost. Even a country that produces record quantities of grain can face food insecurity if a large share of that production is lost due to poor post-harvest practices.

Natural calamities, production deficits, and changing dietary patterns all affect food availability. But among all the factors, post-harvest losses remain the most actionable. Unlike weather or soil conditions, storage, handling, and transportation systems can be directly improved through policy, investment, and technology adoption. Cutting post-harvest losses is, in effect, the equivalent of increasing production – but at a fraction of the cost and environmental impact.

What do you think? If reducing post-harvest losses can be as impactful as increasing production, why do you think investment in post-harvest infrastructure still lags far behind investment in production technologies? And in your local context, which stage of the post-harvest chain do you think needs the most urgent attention?

References

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC3818607/
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC11202419/
3. https://www.fao.org/4/t0073e/t0073e01.htm
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC5296677/
5. https://www.researchgate.net/publication/309177866_Post-harvest_Situation_and_Losses_in_India
6. https://www.statista.com/topics/7824/food-security-in-india/
7. https://foodforwardndcs.panda.org/food-supply-chains/reducing-post-harvest-food-loss-at-storage-transport-and-processing-levels/
8. https://innovation.wfp.org/project/post-harvest-loss-prevention
9. https://link.springer.com/article/10.1007/s44187-024-00129-0