Spade

Key takeaways

Spade belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Spade to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Spade from memory before moving on to harder problems.

Reference excerpt

A spade is a tool primarily for digging, consisting of a long handle and blade, typically with the blade narrower and flatter than the common shovel.

Terminology English spade is from Old English spadu, spædu (f.) or spada (m.). The same word is found in Old Frisian spade and Old Saxon spado. High German spaten only appears in Early Modern German, probably loaned from Low German. In the Netherlands, Denmark, Sweden and Norway the word is spade as well. Other Scandinavian forms are in turn loaned from German. The term may thus not originate in Common Germanic and appears to be a North Sea Germanic innovation or loaned. Closely related is Greek σπάθη : spáthē, whence Latin spatha. Depending on dialect, shovel may or may not overlap semantically with spade. Generally, "shovel" is a generic term for a variety of tools that include numerous broad-bottomed versions for scooping and moving loose materials, such as a "coal shovel", "snow shovel", "grain shovel", etc. By contrast, spades tend to have a sharpened edge, curved profile, and pointed end better designed for digging. The term "garden spade" is used for certain sharp-edged but square-ended tools suited to cutting through sod. A classic spade, with a narrow body and flat (or near flat) tip is suited for digging post holes, and is not to be confused with a "roundpoint" shovel, which has a wider body and tapered tip.

Designs

Spades are made in many shapes and sizes, for a variety of different functions and jobs, and there are many different designs used in spade manufacturing. The most common garden spade typically has a long handle, is wide, and is treaded (has rests for the feet to drive the spade into the ground). An Irish spade is similar to a common garden spade, with the same general design, although it has a much thinner head. A border spade has a similarly shaped blade, but much smaller, as a garden spade; the handle is proportionately longer, though. A sharpshooter is a long, narrow spade - sometimes with thick flanged treads extending beyond the width of the blade to allow for a boot to fit on - for getting into tight spots or for cutting post holes. A turfing iron has a short, round head, and is used for cutting and paring off turf. A digging fork, or grape, not referred to as a spade, is forked much like a pitchfork, and is useful for loosening ground and gardening. The fishtail spade has a flared triangular blade combining the versatility of the Dutch hoe and power of the common round point shovel into a multipurpose tool. Small spades are also made as toys for children, and are useful for small indoor plantings.

History Early spades were made of riven wood or of animal bones (often shoulder blades). After the art of metalworking was developed, spades were made with sharper tips of metal. Before the introduction of metal spades manual labor was less efficient at moving earth, with picks being required to break up the soil in addition to a spade for moving the dirt. With a metal tip, a spade can both break and move the earth in most situations, increasing efficiency.

Loy ploughing

Loy ploughing was a form of manual ploughing carried out in Ireland using a form of spade called a loy. It was done on very small farms where horses could not be afforded or did not have enough work, and on very hilly ground where horses could not work. It was used on poorer land until the 1960s. This suited the moist climate of Ireland as the trenches formed by turning in the sods providing drainage. It also allowed potatoes to be grown on mountain slopes where nothing else could be cultivated.

Use as currency The blade of the spade was used as currency in ancient China. Later, they were miniaturized and then stylized into a flat piece. The Qin dynasty replaced them with round coins.

Also called spades In the oil and chemical process industries, a spade is a solid metal disc that is placed between two pipe flanges to block flow and provide positive isolation, usually to allow maintenance or inspection of the line. The name comes from the shape, which is a little like a garden spade, and the small tab or handle indicates that the spade is in place. In kitchenware, certain ice cream scoops are called spades due to the shape. These scoops are used more in making hand-scooped milkshakes or desserts where a lot of ice cream can be scooped at once and the typical "ball" shape of scooped ice cream (i.e., scoops on a cone) is not needed. The spade-shaped head also helps scrape off the ice cream stuck to the sides of the cartons.

See also Tree spade – Machine for transplanting trees Entrenching tool – Digging tool To call a spade a spade – Figurative expression Digging bar – Long, straight metal bar

References This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Spade". Encyclopædia Britannica. Vol. 25 (11th ed.). Cambridge University Press. p. 526. Etymology OnLine

External links

Illustrations

Worked examples

Example 1 — a first encounter with Spade

Start with the simplest possible case. Write down what Spade claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Spade before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Spade ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Spade

In research: Spade appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Spade in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Spade is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gardening tools, Shovels, so understanding it makes those chapters shorter.
In everyday life: Look for Spade outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Spade in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Spade means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Spade out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Spade in simple terms?

A spade is a tool primarily for digging, consisting of a long handle and blade, typically with the blade narrower and flatter than the common shovel. Terminology English spade is from Old English spadu, spædu (f.) or spada (m.).

Why does Spade matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Spade?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Spade.