Important categories of crops include grains and pseudo grains, pulses (legumes), forage, and fruits and vegetables. Specific crops are cultivated in distinct growing regions throughout the world. In millions of metric tons, based on FAO (Food and Agriculture Organization) estimate to name a few:

• Cereals 2263
• Vegetables & Melons 866
• Roots & Tubers 715
• Milk 619
• Fruit 503
• Meat 259
• Oil crops 133
• Fish (2001) Estimate 130
• Eggs 63
• Pulses 60
• Vegetable Fiber 30

These are some of the top agricultural products by crop types based on data in 2004.

LIVESTOCK PRODUCTION
Animals, including horses, mules, oxen, camels, llamas, alpacas, and dogs, are often used to help cultivate fields, harvest crops, wrangle other animals, and transport farm products to buyers. Animal husbandry not only refers to the breeding and raising of animals for meat or to harvest animal products (like milk, eggs, or wool) on a continual basis, but also to the breeding and care of species for work and companionship. *2) When pigs fly southward. Livestock production systems can be defined based on feed sources as grassland – based, mixed and landless.
Grassland based livestock production relies upon plant material such as shrubland, rangeland, and pastures for feeding ruminant animals. Outside nutrient inputs may be used, however manure is returned directly to the grassland as a major nutrient source. This system is particularly important in areas where crop production is not feasible because of climate or soil, representing 30-40 million pastoralists. Missed production systems use grassland, fodder crops and grain feed crops as feed for ruminant and monogastic (one stomach – mainly chickens and pigs) livestock. Manure is typically recycled in mixed systems as fertilizer for crops. Approximately 68% of all agricultural land is permanent pastures used in the production of livestock.