Final answer:
Sown pastures are also referred to as improved pastures or cultivated pastures, involving the planting of specific grasses and legumes for livestock feed. The practice of planting a single crop on a large scale is known as monoculture. Sustainable land management, observed in contrast to nomadic herding, incorporates practices like rotating grazing and fallow periods to prevent environmental degradation.
Step-by-step explanation:
Sown pastures are areas where grass or other fodder crops are planted rather than naturally occurring. These pastures are often referred to as improved pastures or cultivated pastures. The practice of establishing a sown pasture involves selecting and planting specific grasses and legumes that will provide nutritious feed for grazing animals. In contrast to natural pastures, these cultivated landscapes can be managed more intensively to increase productivity and sustain livestock.
Turning to the practices mentioned in the provided information, planting a single crop over an entire field, like soybeans, is known as monoculture. This type of agriculture focuses on the large-scale cultivation of one crop in a given area. It is typically practiced to maximize efficiency and output, though it can have environmental impacts such as reducing biodiversity and increasing vulnerability to pests and diseases.
Last but not least, the process described in the satellite photos and other historical practices highlight the importance of sustainable land management. The fenced-in areas that were privately owned and managed by rotating grazing animals and periodically letting the fields lie fallow demonstrate a successful implementation of sustainable agricultural practices. Conversely, the land used by the nomads suffered from overgrazing and a lack of management, which led to environmental degradation.