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The dung is recycle normally in mixed systems like fertilizer for the cultures. Approximately 68% of all the agricultural earth are used permanent grass in the cattle production. systems without earth depend on fodder coming from outside the operation, which supposes the separation of the production of cultures and cattle that is more prevalent in the Member States of the OECD. In the EE.UU., 70% of the grain that grows it feeds the animal in corrals on gets fat. The synthetic fertilizers are stronger than the production of cultures is based and the dung use becomes a challenge, as well as one contamination source. Agriculture is the production, transformation, commercialization and use of foods, fibers and by-products of the cultures of plants and animal. situation. Agriculture was the key for the development that took to the sprouting of the human civilization, with the plant and domestic animal young (that is to say, the cultures) the creation of food surpluses that allowed the development of more the densely populated societies and stratified. The study of the Agriculture that is known like agricultural science.
Agriculture also is observed in some species of ants and thermites. Agriculture includes an ample variety of specialties and techniques, including the form to extend earth apt for the plant of bottoms, by the water digging channels and other forms of irrigation. The production of cultures in territories of culture and the pasturing of cattle in pasturing of the pastures to remain in the base of Agriculture. In the past century there has been an increasing preoccupation to identify and to quantify the different forms from Agriculture. In the world developed range generally sustainable Agriculture (for example, the permacultura or ecological Agriculture) and intensive Agriculture extend between (for example, industrial Agriculture).
modern agronomy, the fitomejoramiento, pesticides and fertilizers, and the technological improvements have increased considerably the yields of the culture, but at the same time, they have caused to great ecological damages and negative effects on the human health. The selective young and the modern practices in the animal young as intensive the young of pigs (and similar practices applied to the hen) also have increased the production of meat, but have expressed their preoccupation on the cruelty of the animal and the effects of antibiotics, hormones of growth, and other chemical agents commonly used in the industrial production of meat. The main products Agriculture can be grouped in foods, fibers, fuels and raw materials. In the decade of 2000, the plants have been used for the culture of biofarmacuticos, bioplsticos biocombustibles, products, and the pharmaceutical products. specific foods include cereals, vegetables, fruits and meat. The fibers are the cotton, wool, hemp, soothes and linen. The raw materials include wood and bamboo. Other useful materials are produced by the plants, as the resins. The biocombustibles are the methane from biomass, the ethanol and the biodiesel. The cut flowers, tropical plants of breeding ground, fish and birds for the animal commerce are some of ornamental products. In 2007, a third of the workers of the world was used in Agriculture. The sector of services has surpassed to Agriculture like economic sector with more contracts anywhere in the world.