Some of these, such as Kalama, are owned by the local community and are located on former communal cattle grazing land.
Likewise, Congolese Tutsi businessmen serve as a Rwandan vanguard, opening up eastern Congolese land for cattle grazing and mining.
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Crops, such as wheat, corn, and especially soy, have come to occupy land that was once destined to cattle grazing.
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Riding down the hill towards the harbour with my friend and translator, Choi Li Hung, we pass cattle grazing by the roadside.
"Research on transmission routes has focused on cattle grazing on contaminated pasture, " said Ben Garnett, one of the University of Sussex scientists involved in the study.
The former have accused the latter of grazing cattle on land that does not belong to them.
Pooja Meghwal went missing on 29 March while grazing cattle near the border.
By getting grazing cattle to stay in larger, tight herds, Savory was able to restore grassland vitality and increase grass biodiversity.
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Radioactive isotopes accumulate in milk after they spread through the atmosphere, fall to earth in rain or dust, and settle on vegetation, where they are ingested by grazing cattle.
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But the professor dismisses this, saying most of the arable land is cultivated already, while the rest supports indigenous woodland that is used for grazing cattle, or for wildlife, or both.
It began back in 1966, when Colorado-born mine magnate Courtland Parfet bought the ranch, an area of grassland mainly for grazing beef cattle.
In August, the two communities clashed after members of the Orma community were accused of grazing their cattle on land that the Pokomo say is theirs.
Part of the problem is farmers burning down the trees to make way for grazing lands for their cattle.
They often steal cattle from each other, and clash over grazing rights and access to water points.
The International Livestock Research Institute says large parts of Africa may soon be too dry for grazing, leading to conflicts between rival cattle herders or, as in Sudan's Darfur region, between herders and settled farmers.
James Adler, grazing manager, said the tenancy would provide the cattle with "a safe winter home".
The National Forest Service, from which many ranchers rent grazing land, may require them to graze fewer cattle, in order to encourage native grasses and wildlife.
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The aim is for the same target this year - although the head of cattle has gone up from 90-plus to 138, and the grazing season has been extended to four months (from 40 days last year).
"Not one of these trees has been able to reproduce successfully, because of grazing, " he said referring to the damage done to saplings by hungry cattle and sheep.
This compares with some 200m hectares devoted to cattle ranching, much of which is extensive (a Brazilian cow enjoys, on average, a lordly hectare of grazing).
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