astronomy

Hans M. Heybroek

Hans M. Heybroek is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hans M. Heybroek rather than just read about it. In short: Hans M. Heybroek (30 May 1927, Bussum, - 13 June 2022, Wassenaar) was a Dutch botanist best known for his research into the genus Ulmus at the Dorschkamp Research Institute for Forestry & Landscape Planning.

Key takeaways

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

Reference excerpt

Hans M. Heybroek (30 May 1927, Bussum, - 13 June 2022, Wassenaar) was a Dutch botanist best known for his research into the genus Ulmus at the Dorschkamp Research Institute for Forestry & Landscape Planning. Until his retirement in 1992, he was responsible for the raising and release of numerous elm hybrid cultivars, notably 'Columella'. Specializing in phytopathology, Heybroek also investigated the Coral Spot fungus Nectria cinnabarina in elm. In 1960 he travelled to the Kashmir to search for a frost-hardy form of the Himalayan Elm Ulmus wallichiana as a source of anti-fungal genes for use in the Dutch elm research programme. Heybroek also collected cultural material from around Europe related to the elm.

Publications Aims and criteria in elm breeding in the Netherlands. In H. Gerhold et al., eds. (1966). Breeding pest-resistant trees. Pages 387–389. Pergammon Press, Oxford. Iep of olm, karakterboom van de Lage Landen (:Elm, a tree with character of the Low Countries), (with Goudzwaard, L, Kaljee, H.) (2009). KNNV, Uitgeverij. ISBN 978-90-5011-281-9. The Dutch elm breeding program. Dutch Elm Disease Research, Chapter 3, in Sticklen & Sherald, Eds. (1993). Springer Verlag, New York, USA. Elms of the Himalaya (co-author R. Melville). Kew Bulletin Vol. 26(1), 1971, London. Resistant Elms for Europe. In Burdekin, D. A. (Ed.) Research on Dutch elm disease in Europe. For. Comm. Bull. 60. pp 108 – 113. 1983.

References

External links

Illustrations

Worked examples

Example 1 — a first encounter with Hans M. Heybroek

Start with the simplest possible case. Write down what Hans M. Heybroek claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Hans M. Heybroek 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 Hans M. Heybroek 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 Hans M. Heybroek

In research: Hans M. Heybroek appears in astronomy 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 Hans M. Heybroek 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: Hans M. Heybroek is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1927 births, 2022 deaths, 20th-century Dutch botanists, so understanding it makes those chapters shorter.
In everyday life: Look for Hans M. Heybroek 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.

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How to study Hans M. Heybroek in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hans M. Heybroek 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 Hans M. Heybroek out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hans M. Heybroek in simple terms?

Why does Hans M. Heybroek matter?

Because it connects several astronomy 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 Hans M. Heybroek?

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 Hans M. Heybroek.