Food crops are plants grown mainly to provide food for people. They are an important part of agriculture because they supply carbohydrates, protein, vitamins, minerals, fibre and other nutrients needed by the body. Common examples include maize, rice, cassava, yam, beans, groundnut, vegetables and fruits.
Farmers grow different crops according to the climate, soil, water supply, available farm resources and needs of the people. Some are eaten directly, while others are cooked or processed into flour, oil, starch, juice and other products. Food crop production also provides income and employment for farmers, traders, processors and other people involved in agriculture.
About This Lesson
This lesson explains the meaning of food crops, their major types and examples, their uses and importance. It also discusses the factors that affect their production, the major stages of Food crop production, problems faced by farmers and ways of improving production.
Learning Objectives
At the end of this lesson, students should be able to:
- Define food crops.
- Identify the major types and give examples.
- Explain the uses and importance of different crops.
- State factors that affect food crop production.
- Describe the main stages from planting to harvest.
- Differentiate between food crops and cash crops.
- Suggest ways of improving crop production.
Meaning of Food Crops
Food crops are plants cultivated mainly for human consumption. Farmers may harvest their grains, seeds, roots, underground stems, leaves, fruits or other edible parts depending on the crop.
For example, maize and rice are grown mainly for their grains, cassava for its storage roots, yam for its tubers, cabbage for its leaves and mango for its fruit. Different crops provide different nutrients and have different growing requirements.
It is also important to understand that one crop can belong to more than one group. For example, groundnut is a legume because of its botanical characteristics, but it is also commonly classified as an oil crop because its seeds contain oil. Classification therefore depends on the basis being used.
Main Types of Food Crops
1. Cereal Crops
Cereal crops are mainly grasses cultivated for their grains. They are important sources of carbohydrates and provide energy in the diet of many people.
Examples include maize, rice, wheat, millet, sorghum, oats and barley. Maize can be boiled, roasted or processed into flour, while rice is commonly cooked as a staple food. Wheat is widely used in making bread and other baked products.
2. Legume Crops
Legumes are plants in the pea family, Fabaceae. Many produce seeds inside pods and are important sources of plant protein. Some legumes form associations with nitrogen-fixing bacteria in their root nodules, which can contribute to soil nitrogen under suitable conditions.
Examples include beans, cowpea, soybean, peas and lentils. Groundnut is also a legume, although it is often discussed separately as an oil crop because of its high oil content.
3. Root Crops
Root crops are grown mainly for their edible roots. These roots develop below the soil and may store nutrients that the plant uses for growth.
Examples include carrot, beetroot, radish and turnip. They can be eaten in different ways and are commonly used in soups, salads and other meals.
4. Tuber Crops
Tuber crops produce enlarged underground structures that store food for the plant. Yam and Irish potato are important examples.
Yam produces an underground stem tuber, while Irish potato produces stem tubers that develop from underground stems called stolons. Both are important sources of carbohydrates and can be prepared in several ways.
5. Tuberous Root Crops
Tuberous root crops develop enlarged storage roots that are harvested for food. They should not be confused with stem tubers.
Cassava and sweet potato are common examples. Cassava is processed into products such as garri, fufu and cassava flour, while sweet potato may be boiled, roasted or used in other meals. Cassava must be properly processed before consumption to reduce naturally occurring cyanogenic compounds.
6. Vegetable Crops
Vegetable crops are grown for edible parts such as leaves, fruits, roots, bulbs, stems, flowers or immature seeds. Vegetables come from different plant families, so this is mainly a food-use classification rather than one botanical group.
Examples include cabbage, spinach, tomato, pepper, onion, okra and cucumber. They add variety to meals and can supply vitamins, minerals, fibre and other useful nutrients.
7. Fruit Crops
Fruit crops are cultivated mainly for their edible fruits. Many can be eaten fresh, while others are processed into juice, dried products, jam and other foods.
Examples include mango, orange, banana, pawpaw, pineapple, watermelon and guava. Because many fruits spoil quickly after harvest, proper handling, storage and transportation are important.
8. Oil Crops
Oil crops are cultivated mainly for seeds or fruits that contain useful amounts of oil. Some are also eaten directly.
Examples include groundnut, soybean, sunflower and sesame. Their oils are used in cooking and food manufacturing. Some materials left after oil extraction may also be used in animal feed when they are properly processed and suitable for that purpose.
Examples of Common Food Crops
| Type | Examples | Main part or product |
|---|---|---|
| Cereals | Maize, rice, wheat | Grain |
| Legumes | Beans, cowpea, soybean | Seed |
| Root crops | Carrot, beetroot, radish | Root |
| Tuber crops | Yam, Irish potato | Underground tuber |
| Tuberous roots | Cassava, sweet potato | Storage root |
| Vegetables | Cabbage, spinach, tomato | Leaves, fruits or other edible parts |
| Fruits | Mango, orange, banana | Fruit |
| Oil crops | Groundnut, sunflower, sesame | Oil-rich seed |
Some crops can appear in more than one group. For instance, groundnut is both a legume and an oil crop.
Uses of Food Crops
The uses of these crops vary according to the type of crop and the part harvested.
Direct consumption: Some fruits and vegetables can be eaten fresh when they are suitable for fresh consumption. Others, such as maize, rice, yam and cassava, are usually cooked or processed before they are eaten.
Flour and starch production: Maize, wheat, rice, millet and cassava can be processed into flour. Cassava is also an important source of starch used in food preparation and other applications.
Oil production: Groundnut, soybean, sunflower and sesame can be processed to obtain edible oils. These oils are used mainly in cooking and food manufacturing.
Food processing: Crops can be processed into products such as garri, cassava flour, tomato paste, fruit juice, dried vegetables and potato chips. Processing can increase the value of harvested produce and provide additional markets.
Animal feed: Some crops and their suitable by-products are used as ingredients in animal feed. Maize is an important energy source in many feeds, while soybean meal is commonly used as a protein ingredient.
Income generation: Farmers can sell their harvest to households, traders, processors, restaurants and other buyers. The income obtained can help farmers meet household needs and pay for farm inputs.
Importance of Food Crops
These crops are important to households, farmers, communities and the wider economy.
1. They provide energy
Cereals and many root and tuber crops contain considerable amounts of carbohydrates. Maize, rice, wheat, cassava, yam and sweet potato are examples of crops that contribute energy to the diet.
2. They supply protein
Legumes such as beans, cowpea and soybean are useful sources of plant protein. Protein is needed for growth, body maintenance and other functions.
3. They provide vitamins and minerals
Fruits and vegetables contribute vitamins, minerals, fibre and other nutrients. Eating different types of crops helps provide variety in the diet.
4. They support food security
Crop production helps provide food for households and communities. Growing several suitable crops can reduce dependence on a single harvest, although food security also depends on storage, transport, affordability and access to markets.
5. They provide income
Farmers can earn money by selling their produce. The amount of income depends on factors such as yield, production costs, quality, demand and market prices.
6. They create employment
Crop farming creates work in land preparation, planting, weeding, harvesting and storage. Employment is also created in transportation, processing, packaging, marketing and retailing.
7. They supply raw materials
Many agricultural products are used as raw materials by food-processing businesses. Maize, wheat, cassava, soybean, groundnut and fruits can be processed into different products.
Importance to Farmers
Crops grown for human consumption can serve two important purposes on a farm: feeding the household and generating income. A farmer may keep part of the harvest for family use and sell the remaining portion.
Growing different crops can also spread some production risks. If one crop performs poorly because of weather, pests or disease, another crop may still produce a harvest. However, diversification does not remove all farming risks.
Factors Affecting Food Crop Production
Different crops require different conditions for good growth. Farmers should consider several factors before choosing what to plant.
Climate: Temperature, rainfall, humidity and the length of the growing season affect crop growth. A crop that performs well in a warm and wet environment may not grow successfully in a dry area without suitable water management.
Soil: Soil fertility, texture, structure and drainage influence root development and nutrient availability. Farmers should choose suitable crops and use appropriate soil-management practices.
Water supply: Crops need sufficient water for germination, growth and development. Too little water can reduce yield, while excessive water can damage crops that require well-drained soil.
Planting materials: Good-quality seeds and healthy planting materials help crops establish properly. Farmers should use suitable varieties and healthy materials such as cassava stems or yam setts where appropriate.
Pests and diseases: Insects, diseases and other pests can damage crops and reduce yield. Regular field inspection and appropriate management can help reduce losses.
Weeds: Weeds compete with crops for water, nutrients, sunlight and space. Effective weed management is therefore important, especially during early crop growth.
Labour and equipment: Farmers need labour, tools and sometimes machinery for activities such as land preparation, planting, weeding and harvesting. Limited labour or equipment can delay farm operations.
Capital: Money is needed to obtain seeds, fertilisers, pesticides, labour, machinery and other inputs. Limited capital can restrict the size and quality of production.
Market demand: Farmers may consider the demand and expected selling price before choosing what to grow. However, market prices can change, so production decisions involve some risk.
Stages of Food Crop Production
Production involves a series of activities from choosing the crop to handling the harvested produce.
1. Selection of crop and planting materials
The farmer chooses suitable crops and varieties based on the climate, soil, available resources and intended use. Healthy seeds or other planting materials are selected.
2. Land preparation
The land is cleared where necessary and prepared using methods suitable for the crop and soil. Proper land preparation helps create suitable conditions for planting.
3. Planting
Seeds or other planting materials are placed in the soil at the correct time, depth and spacing. Proper spacing reduces overcrowding and gives plants enough room to grow.
4. Crop maintenance
Growing crops require proper care. Activities may include weeding, watering, nutrient management and control of pests and diseases.
5. Harvesting
Crops are harvested when they reach the appropriate stage of maturity. Harvesting at the right time helps maintain quality and reduce losses.
6. Post-harvest handling
After harvest, produce may be cleaned, sorted, dried, stored, transported, sold or processed. Proper handling helps reduce damage and spoilage.
Problems Facing Food Crop Production
Food Crop production is affected by environmental, economic and management problems. Unreliable rainfall, drought, flooding and unsuitable temperatures can reduce yields or destroy crops.
Pests, diseases and weeds can also cause serious losses. Farmers may face high costs of seeds, fertilisers, labour, machinery and transportation. Poor access to credit, irrigation, storage facilities and reliable markets can make production more difficult.
Post-harvest losses are another important problem. Fruits and vegetables can spoil quickly, while grains and other stored products may be damaged by moisture, insects and rodents. Good harvesting, drying, storage and transportation practices can help reduce these losses.
Role in the Community
Crop farming supports more than the people who work directly on farms. Traders buy produce from farmers, transporters move it to markets, processors turn it into different products, and retailers sell it to consumers.
This creates a chain of economic activities within communities. When farmers produce enough quality crops and have access to markets, crop production can contribute to household livelihoods and local economic activity.
Difference Between Food Crops and Cash Crops
Food crops are generally cultivated mainly to provide food, while cash crops are generally produced mainly for sale and income. However, the distinction is not absolute because the same crop can serve both purposes.
For example, a farmer may grow maize mainly for family consumption, while another farmer may grow maize mainly for sale. Groundnut can also be eaten by people while being produced and sold as a commercial product.
| Basis | Food crops | Cash crops |
|---|---|---|
| Main purpose | Mainly for food | Mainly for sale and income |
| Examples | Maize, yam, cassava, beans | Cocoa, rubber, cotton, tea |
| Main use of harvest | Consumption, processing or sale | Commercial sale or industrial processing |
Ways to Improve Food Crop Production
Farmers can improve production by choosing suitable crop varieties and using healthy planting materials. Planting should be done at the appropriate time, spacing and depth. Proper soil management and adequate water supply are also important.
Regular weed control and suitable management of pests and diseases can protect crops from avoidable losses. Farmers should also use good harvesting, drying, storage and transportation methods to reduce post-harvest losses.
Access to agricultural information, improved farm inputs, credit, suitable equipment, storage facilities and reliable markets can further help farmers increase productivity and reduce waste.
Summary
Food crops are plants cultivated mainly for human consumption. Major groups include cereals, legumes, root crops, tuber crops, tuberous root crops, vegetables, fruits and oil crops. Common examples are maize, rice, wheat, beans, cowpea, cassava, yam, Irish potato, sweet potato, tomato, cabbage, banana and mango.
They provide energy, protein, vitamins, minerals and other nutrients. They also support food security, provide income, create employment and supply raw materials for food-processing businesses. Successful production depends on suitable climate and soil, adequate water, healthy planting materials, proper farm management and good post-harvest practices.
Revision Questions
- What are food crops?
- List ten examples.
- Mention six major types and give two examples of each.
- What are cereal crops? Give four examples.
- State four examples of legume crops.
- Differentiate between a root crop and a tuber crop.
- State five uses of crops grown for human consumption.
- Explain five reasons why they are important.
- Mention five factors that affect crop production.
- Explain the difference between food crops and cash crops, giving three examples of each.
Frequently Asked Questions
1. What are food crops?
They are plants cultivated mainly to provide food for people. Examples include maize, rice, cassava, yam, beans, fruits and vegetables.
2. What are the major types of food crops?
The major groups include cereals, legumes, root crops, tuber crops, tuberous root crops, vegetables, fruits and oil crops.
3. What is the difference between a root crop and a tuber crop?
A root crop is harvested mainly for an edible storage root, such as cassava or carrot. A tuber crop produces an enlarged underground structure, such as yam or Irish potato.
4. Is groundnut a food crop?
Yes. Groundnut is a legume that can be eaten directly or processed to produce oil. It can therefore be classified according to both its botanical group and its use.
5. What are the uses of food crops?
They are eaten directly or after cooking, processed into products such as flour and oil, used in some animal feeds and sold to generate income.
6. Why are food crops important to farmers?
They provide food for households and can also provide income when the harvest is sold. Crop production also creates opportunities for other agricultural activities.
7. What factors affect crop production?
Important factors include climate, soil, water, planting materials, pests, diseases, weeds, labour, capital and market demand.
8. Can one crop be both a food crop and a cash crop?
Yes. Maize and groundnut, for example, can be grown for household consumption and can also be produced for sale. The purpose of production affects how the crop is described.