The presence of nitrate in the water is predominantly a consequence of land management decisions and farming practice.

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This is not all that much different from farming practice in developed countries, where growers have long been used to buying new hybrid seed every year.

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The only way to discover whether they will arise in real life, or whether they will be any more damaging than similar risks posed by conventional crops and farming practice, is to do more research in the field.

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Farming practice may be improving.

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Tax farming was a practice followed by the Persian and various other ancient empires.

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Agricultural output was also greatly stimulated by the creation of three-field farming instead of the old Roman practice of two-field farming.

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Crossbencher Baroness Mar said micro-chipping dogs at birth would prevent the "iniquitous practice" of puppy farming.

BBC: Mandatory micro-chipping for dogs planned

Roughly 85% of all furs start out as farmed animals on unmarked plots of land, often to avoid the attention of animal rights activists. (Farming started as a U.S. practice in the 19th century.) Ranchers, most of them in northern Europe and North America, breed mink, foxes and chinchillas for consistency of color and texture.

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Some industries such as banking are fairly well along in making computer systems year-2000 compliant, but others, including food processing, agriculture and farming, some government services, construction, law, and medical practice are lagging, Marcoccio said.

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In practice, they provide cheap labour (mainly from Asia) for the garment industry, farming and fish-processing.

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