Subsistence farming that farms a little area with restricted source inputs and generates just enough food to satisfy the requirements of their family. At the opposite end is intensive industrial agriculture, such as agriculture. Such farming entails large areas and amounts of critters, high source inputs (fertilizers, pesticides, etc.), and also a high level of mechanization.
These operations generally try to maximize fiscal income from grain, create, or livestock. Contemporary agriculture expands well past the traditional creation of food for humans and animal feeds.
The 20th Century saw enormous changes in agricultural practice, especially in agricultural chemistry. Agricultural chemistry contains the application of compound fertilizer, chemical compounds, and chemical fungicides, soil makeup, analysis of farm products, and nutritional needs of farm animals.
Starting in the Western world in the green revolution spread a lot of those alterations to farms around the world, with varying success. Other recent developments in agriculture include hydroponics, plant breeding, hybridization, gene manipulation, better management of soil nutrients, and improved weed control.
Genetic engineering has afforded plants that have capabilities beyond those of naturally occurring plants, such as higher yields and disease resistance. Modified seeds germinate quicker, and consequently can be grown within a protracted growing area. Genetic engineering of crops has proven contentious, especially in the instance of herbicide-resistant plants.