Apsim agricultural production systems simulator video

Wikimedia Commons has media related to Farming.The objectives of this study were to evaluate the capability of APSIM model for simulating two wheat cultivars contrasting in canopy development and phenologyГўв‚¬вЂ№,Г‚В . The major crops produced in the world in 2002, are maize (corn), wheat, rice, and cotton.ДЄgriculture by country There are some serious problems that people face trying to grow food today. Common goals of policy include the quality, amount, and safety of food.

Integrated farming is using local resources, and trying to use the waste from one process as a resource in another process.ДЄgricultural policy focuses on the goals and methods of agricultural production.

Organic farming is using only natural products such as compost and green manure.

It uses pesticides, machinery, chemical fertilizers.

Intensive agriculture is mostly done in countries with more money.

Traditional agriculture is mostly done in poor countries.

For this reason, there are several types of agriculture. Other people say intensive agriculture is damaging the environment. People say it is not always safe, because it contains some chemicals. It is important for there to be enough food for everyone. One example is modifying the plant to resist herbicides. Some plants are improved with genetic engineering. Fertilizers, chemical pest control, and irrigation all help. Centuries of artificial selection and breeding have changed crop plants. They also choose plants that can survive plant disease and drought, and are easier to harvest. These problems have all got solutions, and modern young farmers usually have a good technical education.ДЇarmers select plants with better yield, taste, and nutritional value. Irrigation (adding water from rivers) can pollute water and lower the water table. The soil can be damaged by erosion (blowing or washing away), salt buildup, or loss of structure. They can also create bugs and weeds that are more resistant to the chemicals, causing outbreaks of these pests.

These chemicals can pollute the soil or the water.

Farmers use a lot of chemical fertilizers, pesticides (chemicals that kill bugs), and herbicides (chemicals that kill weeds). This kind of intensive agriculture comes with its own set of problems. There are fewer farmers in rich countries, but the farmers are able to grow more. Many farms also use machines, so fewer people can farm more land. During the 20th century they have become more productive because farmers are able to grow better varieties of plants, use more fertilizer, use more water, and more easily control weeds and pests. In some countries, farms are often fewer and larger. This provides more nutrition for the farmer's family, but can be bad for the country and the surrounding environment over many years. Where yields are low, deforestation can provide new land to grow more food. Drought and other problems sometimes cause famines. This is because subsistence farmers are generally less educated, and they have less money to buy equipment. The yield is the amount of food grown on a given amount of land, and it is often low. They can only grow enough food to feed the farmer, his family, and his animals. Many people still live by subsistence agriculture, on a small farm. Therefore they are not classed as arable land in the statistics.ДЄgriculture is not only growing food for people and animals, but also growing other things like flowers and nursery plants, manure or dung, animal hides ( skins or furs), leather, animals, fungi, fibers ( cotton, wool, hemp, and flax), biofuel, and drugs (bio pharmaceuticals, marijuana, opium). They cannot be switched easily with growing field crops.

Growing fruit means having orchards devoted to fruit. Types Arable farming ДЄrable farming means growing crops. This allowed the human population to grow to such large numbers as there are today. Farming can feed many more people than hunter-gatherers can feed on the same amount of land.

People may have started farming because the weather and soil began to change. People probably started agriculture slowly by planting a few crops, but still gathered many foods from the wild. Wheat and barley are some of the first crops people grew. The area called Fertile Crescent is now in the countries of Iraq, Syria, Turkey, Jordan, Lebanon, Israel, and Egypt. The development of farming gave rise to the Neolithic Revolution as people gave up nomadic hunting and became settlers in cities.ДЄgriculture and domestication probably started in the Fertile Crescent (the Nile Valley, the Levant and Mesopotamia). Farming is a part of agriculture.ДЄgriculture started thousands of years ago, but no one knows for sure how old it is. Farming is growing crops and keeping animals for food and raw materials.

Apsim agricultural production systems simulator video