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Results for plow:

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plow
SYNONYMS OR RELATED TERMS: plough
CATEGORY: artifact
DEFINITION: A tool designed to be drawn through the ground to break it up for cultivation, often powered by a yoke (or more) of oxen, other animals, or men. The earliest type of plow, developed from the hoe and digging stick, is the ard or scratch plow, which stirs the soil without turning it. Cross-plowing, the result of a second plowing at right angles to the first, is usually necessary. This type was of Near Eastern origin c 4th millennium BC. The later plow, heavier and wheeled, did not appear until the early centuries AD. It is more suited to the heavier soils of Europe. Prehistoric America, lacking suitable draft animals, did not have a plow. The 18th-century addition of the moldboard, which turned the furrow slice cut by the plowshare, was an important advance. The plow is considered the most important agricultural implement of history, used to turn and break up soil, to bury crop residues, and to help control weeds.
plow beam
SYNONYMS OR RELATED TERMS: plough beam
CATEGORY: artifact
DEFINITION: The wooden or metal bar that connects the blades, shares, and their mountings to the yoke, which in turn is attached to the harnesses fitted to the draught animals that provide the power. The plough beam has to be strong enough to transmit the power from the traction through to the blades and share cutting through the ground, but long enough for the draught animals not to be snagged by the plowing mechanism itself.
plow marks
SYNONYMS OR RELATED TERMS: plough marks, plowmarks, plow scars
CATEGORY: feature
DEFINITION: Marks left in buried soil indicating that the land has been plowed at some remote time, giving evidence of ancient agricultural activity. Plow marks have been found, for example, under several British Neolithic monuments and are valuable evidence for ancient clearance and cultivation. They are identified by sharp physical discontinuities in soil color and texture as seen in excavation profiles or plan-view.
plow zone
CATEGORY: geology
DEFINITION: The top layer of the soil to the depth at which a plow will penetrate and disturb archaeological deposits.
plowhshare
CATEGORY: artifact
DEFINITION: The part of a plough that goes into the ground to disturb or turn the soil. These often become detached from the main mechanism of the plough while working and are subsequently lost. For this reason many ploughsoils, both ancient and modern, contain within them broken or lost ploughshares as a tell-tale sign of past or ongoing agricultural practices.
plowshare
CATEGORY: artifact
DEFINITION: The part of a plough that goes into the ground to disturb or turn the soil. These often become detached from the main mechanism of the plough while working and are subsequently lost. For this reason many plowsoils, both ancient and modern, contain within them broken or lost ploughshares as a tell-tale sign of past or ongoing agricultural practices.
plowshare-shaped currency bar
CATEGORY: artifact
DEFINITION: Type of iron ingot found in the 1st and 2nd centuries BC in southern England, typically about 0.5m long, an elongated triangle in outline, with turned-in corners at the wider end. Examples of this style of currency bar are mainly found in the Thames Valley and south midlands.
plowwash
SYNONYMS OR RELATED TERMS: ploughwash
CATEGORY: geology
DEFINITION: A sediment caused by farming activities in breaking up the soil on hills or slopes. The cultivation of soil for crops, or the intensive pasturing of animals, causes a change in the structure of the soil which may result in poor drainage; combined with the lack of vegetation, causing the soil to move downhill.

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