Crop

A crop is any plant or plant product harvested for human use. People cultivate these plants at a large scale to produce food, fiber, fuel, and other essential products. Crops have been central to human civilization since the first agricultural revolution. During this period, early societies began to domesticate plants for food and trade. Because of their economic importance, crops are studied through several scientific disciplines. These include agronomy, which is the science of soil management and crop production. Horticulture focuses on plant cultivation, while forestry involves managing forest growth for timber.

Crops are often classified by their primary end use, which refers to their specific purpose. The Food and Agriculture Organization (FAO) provides a way to categorize these plants. For example, cereals like wheat, maize, and rice are grown for human food. Vegetables such as cabbage and carrots also serve human consumption. Fruit and nut crops, including apples and almonds, fall into this category. Oilseed crops like soybeans provide edible oils or are used for industrial purposes. Other crops serve different roles, such as stimulants like coffee or fiber crops like cotton for textiles. A single crop can have multiple uses. Maize, for instance, is used for human food, animal fodder, and biofuel production.

In addition to production crops, some plants serve supporting ecological roles. A cover crop is planted specifically to protect soil health and reduce erosion. These are not grown for sale but to improve fertility. A nurse crop is an annual plant sown alongside slower-growing perennial plants. The nurse crop provides shelter for seedlings and helps suppress weeds. Another type is the trap crop, which is planted to attract pests away from the main harvest. This method helps reduce damage without relying only on pesticides. These examples show that crops can be managed for both production and environmental protection.

Farmers use several distinct methods to manage their fields. Monoculture is the practice of growing only one crop species in a field at a time. Monocropping is a related method where a single crop is grown year after year on the same land. To improve soil, many use crop rotation. This involves growing a sequence of different crops in the same area across different seasons. In the Southeast US, a common rotation includes corn, winter wheat, and soybeans. Polyculture and intercropping involve growing more than one crop together in the same place. Some designers use permaculture to create sustainable systems by mimicking natural ecosystems.

Crop production is often tied to specific seasonal and climate patterns. On the Indian subcontinent, these patterns are formalized into three distinct categories. Kharif crops are grown during the monsoon season. Rabi crops are cultivated during the winter. Zaid crops are planted during the short summer period between the other two. These categories ensure that plants are grown when their specific climate conditions are most favorable. This seasonal alignment is a key part of successful large-scale agriculture.

Global production of primary crops has seen massive growth recently. Between 2000 and 2023, global production increased by 61 percent. This brought the total to 9.9 billion tonnes, which is 3.7 billion tonnes more than in 2000. In 2023, just four crops accounted for half of all global primary crop production. These were sugarcane at 20 percent, maize at 13 percent, wheat at 8 percent, and rice at 8 percent. This growth resulted from increased irrigation, better farming practices, and the use of high-yield crops. The total value of this production also rose significantly, reaching USD 3.0 trillion in 2023.

Crops are vital for the world's energy and trade systems. In 2023, cereals provided 42 percent of the global dietary energy supply. Oil crops provided 13 percent, and sugar crops provided 8 percent. While many crops are for food, non-food uses are increasing. For example, non-food uses accounted for 45 percent of oil crops in 2023. International trade also moves these resources across borders. About 46 percent of oil crops and 34 percent of sugars are exported globally. This interconnected system ensures that various regions receive the food and materials they need.