Food production Revision Notes

Agricultural systems are organised methods of producing food and other products from the land. They can be broadly divided into commercial and subsistence farming. Commercial farming produces crops and livestock primarily for sale and profit, often involving large-scale operations and mechanisation. For example, a commercial wheat farm in the USA grows vast areas of wheat to sell on global markets. Subsistence farming, by contrast, focuses on growing enough food to feed the farmer's family, with little surplus for sale. This is common in rural areas of developing countries, such as smallholder farms in parts of Sub-Saharan Africa.

Within these categories, farming is further classified by the type of production: arable farming involves growing crops like cereals, vegetables, or fruits; pastoral farming is the rearing of animals such as cattle, sheep, or goats; mixed farming combines both crop growing and livestock rearing on the same farm. For example, a mixed farm in the UK might grow barley and keep dairy cows, allowing diversification and risk reduction.

• Commercial farming: large-scale, profit-oriented, often mechanised.
• Subsistence farming: small-scale, family food production, limited surplus.
• Arable farming: crop cultivation (e.g., wheat, maize).
• Pastoral farming: livestock rearing (e.g., sheep, cattle).
• Mixed farming: combination of crops and livestock on one farm.

Agricultural systems rely on inputs, processes, and outputs. Inputs include seeds, fertilisers, water, labour, machinery, and capital. For example, a commercial rice farm may use high-yield seed varieties, chemical fertilisers, irrigation, and tractors.

Processes involve the activities that transform inputs into outputs. These include land preparation, planting, crop management (such as pest control and irrigation), animal husbandry, and harvesting. For instance, in pastoral farming, processes include breeding, feeding, and caring for livestock.

Outputs are the products obtained from farming, such as crops (wheat, maize, vegetables) and animal products (meat, milk, wool). The quantity and quality of outputs depend on the efficiency of inputs and processes, as well as environmental conditions.

• Inputs: seeds, fertilisers, water, labour, machinery, capital.
• Processes: planting, cultivating, pest control, animal care, harvesting.
• Outputs: crops and livestock products.
• Efficiency depends on input quality, process management, and environment.

Natural factors strongly influence the type and success of farming in any area. Relief affects mechanisation and soil depth; flat plains are easier to cultivate and suitable for arable farming, while steep slopes often support pastoral farming due to soil erosion risks. For example, the flat Central Valley in California supports intensive crop farming, whereas the Scottish Highlands are mainly pastoral.

Climate determines temperature, rainfall, and growing seasons. Warm, wet climates favour diverse crop production, while dry or cold climates limit options. For instance, Mediterranean climates support vineyards and olives, while tundra regions are unsuitable for farming.

Soil quality, including fertility, texture, and drainage, affects crop yields. Fertile loam soils are ideal for arable farming, whereas poor, acidic soils may only support grazing. Farmers may improve soils with fertilisers or drainage systems to increase productivity.

• Relief: flat land suits arable farming; steep slopes favour pastoral farming.
• Climate: temperature and rainfall control crop types and growing seasons.
• Soil: fertility and texture influence crop yields and farming type.
• Examples: California (flat, fertile), Scottish Highlands (steep, pastoral).

Economic factors such as market demand, access to capital, and technology affect farming choices. Commercial farms often invest in machinery and improved seeds to maximise profit, while subsistence farmers may lack resources to do so. For example, farmers near urban markets may grow perishable vegetables for quick sale.

Social factors include cultural traditions, land ownership patterns, and labour availability. In some societies, farming methods are passed down generations, influencing crop choices and techniques. Land tenure systems can encourage or discourage investment in land improvement.

Infrastructure like roads and storage facilities affects transport and marketing of produce. Poor transport can limit access to markets, reducing profitability and encouraging subsistence farming. Government policies and subsidies also shape agricultural practices by providing incentives or restrictions.

• Economic: market demand, capital availability, technology use.
• Social: traditions, land ownership, labour supply.
• Infrastructure: transport, storage, market access.
• Policies: subsidies, land reforms influence farming decisions.

Food shortages arise when food production or distribution fails to meet population needs. Natural disasters such as droughts reduce water availability, limiting crop growth; floods can destroy crops and erode soils; pest outbreaks can devastate harvests. For example, the 2011 East Africa drought caused widespread crop failure and livestock deaths.

Economic and political issues also cause shortages. Low investment in agriculture limits productivity; poor transport infrastructure hinders food distribution; political instability can disrupt farming and markets. For instance, conflict zones often experience food insecurity due to disrupted farming and trade.

Impacts of food shortages include malnutrition, increased mortality, social unrest, and economic decline. Food aid may be necessary to prevent famine, but reliance on aid can create dependency. Long-term strategies to improve agricultural output include introducing drought-resistant crops, improving irrigation, investing in infrastructure, and supporting smallholder farmers.

• Natural causes: droughts, floods, pests reduce food production.
• Economic/political causes: low investment, poor transport, conflict.
• Impacts: malnutrition, mortality, social unrest, economic loss.
• Responses: food aid, improved technology, infrastructure, farmer support.