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Modern agriculture depends heavily on technology and the physical and biological sciences. Irrigation, drainage, conservation and health, which are vital to a successful agriculture, require specialized knowledge of agricultural engineers. Agricultural chemistry, however, deals with the application of fertilizers, insecticides and fungicides, repairing floors, an analysis of agricultural products, etc.. Seed varieties have been improved to where he could germinate faster and adapt to shorter seasons in different climates. The seeds can withstand current pesticides can wipe out all the green plants. Hydroponic cultivation, a method for growing without soil, using nutrient solutions of chemicals, can help meet the growing needs of production as the global population increases. Other modern techniques that have contributed to the development of agriculture are the packaging, processing and

marketing. Thus, the processing of food, such as rapid freezing and dehydration have opened new horizons for the marketing of products and increased the potential markets. Types of agriculture [edit] Irrigated crop farming types algodón.Los can be divided according to different classification criteria: According to its dependence on water: Rainfed: agriculture is produced without the addition of water by the same farmer, nurturing the soil from rain and / or groundwater. Irrigated: produced with the input of water by the farmer, through the provision of channels that captures natural or artificial surface, or by extraction of groundwater from wells. According to the scale of production and its relation to the market: Subsistence farming consists in producing the minimum amount of food needed to meet the needs of the farmer and his family, with little surplus to sell. The technical level is primitive. Industrial Agriculture: There are large quantities, using expensive means of production and surplus for market. Typical of industrialized countries, the developing countries and the internationalized sector of poorer countries. The technical level is technological. Agriculture may also be defined as a market. It is intended to get maximum performance or minimal use of other means of production, which determine a greater or lesser environmental footprint: Intensive agriculture: looking for a big production in a small space. Implies a greater wear of the site. Typical of industrialized countries. Extensive agriculture depends on a larger surface area, ie, causing less pressure on the place and its ecological relationships, but benefits are often trade lower. According to the method and objectives: Agriculture traditional systems typically use a place that have shaped the culture of it, more or less prolonged periods. Industrial Agriculture: based mainly in intensive systems, is focused on producing large quantities of food in less time and space, but more eco-wear, designed to move large commercial benefits. Organic farming and organic farming: create several production systems that respect the ecological character of sites and geobiológicas of soil, trying to respect the seasons and natural distributions of plant species. Natural agriculture.