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The Affordable Care Act (ACA), formally known as the Patient Protection and Affordable Care Act (PPACA) and informally as Obamacare, is a landmark U.S. federal statute enacted by the 111th United States Congress and signed into law by President Barack Obama on March 23, 2010.
A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.
In Nevada, over 90 percent of the cropland is used to grow hay. [12] Alfalfa hay is also the number one crop of Arizona. In 2008, Arizona's hay crop sold for $288 million. [13] Other than hay, the southwestern states do produce a good amount of crops which grow well in warm climates. Arizona's crops, excluding hay, make about $1.9 billion per year.
A large portion of cattle were moved through Arizona en route to California in the 1850s. Permanent herds were not present until the Civil War. [7]During the Civil War era in Arizona, Native American Pima and Maricopa tribes would grow crops such as wheat, corn, beans, melons, and pumpkins by the millions of pounds due to newly acquired technology.
The life zone concept was developed by C. Hart Merriam in 1889 as a means of describing areas with similar plant and animal communities. Merriam observed that the changes in these communities with an increase in latitude at a constant elevation are similar to the changes seen with an increase in elevation at a constant latitude.
The Plant Patent Act of 1930 gave plant breeders the same status as mechanical and chemical inventors had through patent law. [2] The early objectives of the breeding stations were to develop new varieties to better satisfy the American demand for better dessert, canning and freezing varieties. [ 1 ]
The soils were selected to have enough carbon to provide for the plants of the ecosystems to grow from infancy to maturity, a plant mass increase calculated to be 20 short tons (18,000 kg). [56] The release rate of that soil carbon as carbon dioxide by respiration of soil microbes was an unknown that the Biosphere 2 experiment was designed to ...
According to the United States Department of Agriculture, the Plant Hardiness zone at Red Hills Visitor Center 2,553 feet (778 m) is 9b with an average annual extreme minimum temperature of 25.8 °F (−3.4 °C), and 9a with an average annual extreme minimum temperature of 23.4 °F (−4.8 °C) at Rincon Mountain Visitor Center 3,091 feet (942 m).