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Components of a simple drawn plow: 1) beam; 2) three point hitch; 3) height regulator; 4) coulter (or knife) 5) chisel 6) plowshare 7) moldboard Instrument for cleaning a plowshare used at a mill near Horažďovice, Czech Republic. In agriculture, a plowshare or ploughshare (UK; / ˈ p l aʊ ʃ ɛər /) is a component of a plow (or plough).
In the southern hemisphere, so-called giant discs are a specialised kind of disc harrows that can stand in for a plough in rough country where a mouldboard plough cannot handle tree stumps and rocks, and a disc-plough is too slow (because of its limited number of discs). Giant scalloped-edged discs operate in a set, or frame, that is often ...
The chisel plough is a common tool for deep tillage (prepared land) with limited soil disruption. Its main function is to loosen and aerate the soils, while leaving crop residue on top. This plough can be used to reduce the effects of soil compaction and to help break up ploughpan and hardpan. Unlike many other ploughs, the chisel will not ...
Ransome Victory Plough (American spelling "plow") is a type of single-share mouldboard plough commonly used throughout Southern Africa. Introduced into much of Southern Africa in the mid-1920s via European farmers and missionaries, it was quickly adopted over earlier, heavier models that required multiple spans (teams) of oxen.
This page was last edited on 28 April 2023, at 23:18 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
A four-ox-team plough, circa 1330. The ploughman is using a mouldboard plough to cut through the heavy soils. A team could plough about one acre (0.4 ha) per day. The typical planting scheme in a three-field system was that barley, oats, or legumes would be planted in one field in spring, wheat or rye in the second field in the fall and the third field would be left fallow.
A Foldscope is an optical microscope that can be assembled from simple components, including a sheet of paper and a lens. It was created by Manu Prakash and designed to cost less than one USD to build. It is a part of the "frugal science" movement which aims to make cheap and easy tools available for scientific use in the developing world. [2]
The resolution of a microscope is defined as the minimum separation needed between two objects under examination in order for the microscope to discern them as separate objects. This minimum distance is labelled δ. If two objects are separated by a distance shorter than δ, they will appear as a single object in the microscope.