Food and agriculture
Agriculture means growing crops and raising animals. It gives us grains (rice, wheat), vegetables and fruits, milk, eggs and meat, and also cotton, rubber and fodder for animals.
Food gives our body energy (carbohydrates and fats), growth material (proteins) and protection (vitamins and minerals). A farm turns sunlight, water and soil into this food.
Many countries cannot grow all the food they eat, so they buy some from abroad. The share of food a country grows by itself is called food self-sufficiency. Food that reaches everyone, at a price they can pay, is called food security.
Natural environment and agriculture
A crop needs four things from nature: sunlight (to make food in leaves), water (rain or irrigation), soil (nutrients and a place for roots) and a suitable temperature.
Too little or too much of any one of them lowers the harvest. Rice likes warm weather and a lot of water. Wheat likes cool weather and less water. This is why different places grow different crops.
Farms also change nature. A field is not a forest. It has fewer kinds of plants and animals, but it can still give homes to birds, insects and frogs if hedges, trees and ponds are kept.
Environmental conservation and agriculture
Farming can hurt nature when:
- bare soil is washed away by rain (soil erosion);
- too much fertiliser or pesticide flows into rivers and ponds;
- too much water is pumped out so the water table falls;
- forests are cut to make new fields.
Farming can also protect nature. Trees and grass along the edge hold soil. Compost and crop rotation keep the soil fertile. Drip irrigation saves water. Mixed crops and ponds keep wildlife alive. A farm that can be used for many years without damage is called sustainable.
Lifestyle culture and agriculture
Farming shaped how people live. Festivals follow the farming year: thanksgiving for the first rice in many countries, Pongal and Makar Sankranti, Baisakhi, Onam and Bihu in India. Songs, dances, food and clothes often come from planting and harvest.
Local food comes from local crops: millet rotis, rice dishes, noodles or bread, depending on the place. Fields and terraces, village ponds and rice paddies are also part of the beauty of the landscape. This shared way of life is called agricultural culture, and many places try to keep it alive.
Trends and outlook of agriculture
Farming is changing. Here are the main trends:
- Fewer and older farmers. Many young people move to cities, so the average age of farmers is rising in many countries.
- Climate change. Hotter days, floods and droughts make harvests less certain.
- Smart tools. Sensors, drones and machines save water, medicine and labour.
- New ways to sell. Farmers sell directly to buyers, online or through local markets, and add value by making products such as jam or flour.
- Care for nature. More farmers use organic and low-waste methods.
The big question for tomorrow: how can we grow enough food for everyone and still keep soil, water and wildlife healthy?
Key formulas and definitions
- Harvest depends on: sun + water + soil + temperature (the weakest one limits the crop)
- Food self-sufficiency (%) = food grown in the country ÷ food the country needs × 100
- Soil erosion = bare soil + heavy rain (cover the soil to stop it)
- Sustainable farming = enough food now + healthy soil, water and wildlife later
Worked examples
1. A village needs 500 tonnes of grain a year and its farms grow 400 tonnes. What is its food self-sufficiency?
Self-sufficiency = 400 ÷ 500 × 100 = 80%. The village must still bring 100 tonnes from outside.
2. A field gives 24 plates of food when cared for. Without care, soil loss cuts the harvest by 30%. How many plates now?
30% of 24 = 7.2. So 24 − 7.2 = 16.8, about 17 plates. Care for the land saves about 7 plates.
3. Name two ways the farm in the 3D hurts the river and two ways a farmer can stop it.
Hurt: mud washing off bare soil, and extra fertiliser flowing in. Stop: plant trees and grass at the edge, and use only the fertiliser the crop needs.
Common mistakes
- Thinking farming only affects the farm. Runoff can reach rivers and towns far away.
- Thinking more water or more sun is always better. Every crop has a best amount.
- Thinking food security means only growing a lot. People must also be able to reach and afford the food.
- Thinking traditional farming culture is old-fashioned and useless. It holds useful local knowledge and keeps communities together.