In the world of agriculture, there have been many changes. If you look at agricultural things from the 1900’s and compare them to agricultural things now, you will see a big difference. Things like livestock use, machines, arable land, farmers, etc. have changed throughout this millennia. Though, the rate of agricultural change was different depending on where you lived. For thousands of years agriculture development was very slow. Around 5500 BCE, farmers in Mesopotamia created simple irrigation systems. By channeling water in between their crops in small streams, farmers were able to settle in areas once thought to be unsuited for agriculture. First in Mesopotamia, then later in Egypt and China, people worked together to build and maintain better irrigation systems. During the last 50 years, farming in the United States and other developed countries has been revolutionized by the widespread use of machinery and by the direct use of improved methods in agricultural production. In the early 1900’s, farmers preformed chores by hand. For instance, they plowed with a walking plow, and went to town on horseback. The power needed to carry out farm operations was supplied by humans and work animals like draft horses. The food that fed the farmer and his family, and the animal feed both came from the farm. Fuel was obtained from the woodlot on the farm and fertilizer was seldom. The hand pump and windmills pumped water. Butchering at the farm and trading of bread grains for flour were common. By the 1950’s, things had greatly changed. Electricity allowed new powered equipment to preform many chores. This way, farmers had more time to do other things. Plowing was done by the tractor gangplow; and the hay rake, hay loader, or pick-up baler had greatly reduced the amount of work the farmer had to do for hay harvest. In third-world countries, farmers could not afford new technology so they were still working by hand. Only just recently have third-world countries been able to use electrical technology.