astronomy

Hari Krishan Jain

Hari Krishan Jain 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 Hari Krishan Jain rather than just read about it. In short: Hari Krishan Jain (28 May 1930 - 8 April 2019) was an Indian cytogeneticist and plant breeder, known for his contributions to the field of genetic recombination and the control of interchromosome level. He is a former chancellor of the Central Agricultural University, Imphal, a former director of the Indian Agriculture Research Institute and a recipient of honours such as Rafi Ahmed Kidwai Award, Borlaug Award and O…

Key takeaways

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

Reference excerpt

Hari Krishan Jain (28 May 1930 - 8 April 2019) was an Indian cytogeneticist and plant breeder, known for his contributions to the field of genetic recombination and the control of interchromosome level. He is a former chancellor of the Central Agricultural University, Imphal, a former director of the Indian Agriculture Research Institute and a recipient of honours such as Rafi Ahmed Kidwai Award, Borlaug Award and Om Prakash Bhasin Award. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1966, for his contributions to biological sciences. He received the fourth highest Indian civilian honor, the Padma Shri, in 1981.

Biography Hari Krishan Jain, born on 28 May 1930 in a Jain family in Gurgaon, in the Indian state of Haryana to Nemi Chand Jain and Chameli Devi, graduated in botany (BSc hons) from the University of Delhi in 1949 after which he secured an associate-ship from the Indian Agriculture Research Institute (IARI) in 1951. Subsequently, he pursued his doctoral studies at the Aberystwyth campus of the University College of Wales, on a Science Research Scholarship of the Royal Commission, London to secure his PhD and returned to India to start his career as a cytologist at IARI in 1956. He stayed at IARI until his superannuation from service as its Director in 1983 during which time he served as the Head of Genetics Division from 1966 to 1978. In 1984, he became associated with the International Service for National Agricultural Research of the Consultative Group for International Agricultural Research (CGIAR) where he served as the deputy director general. Later, he continued his academic life at the Rajasthan College of Agriculture of Maharana Pratap University of Agriculture and Technology, Udaipur until he was appointed as the chancellor of the Central Agricultural University, Imphal. Jain is married to Kusum Lata and the couple has two children, Neera and Reena.

Legacy Jain's early researches on Lilium, a genus of herbaceous plants, and its meiotic cell division revealed the correlation between the chromosome condensation and nucleolar synthesis. After joining IARI, he and his colleagues worked on the cytological mechanisms of genetic recombination, on Delphinium, a perennial flowering plant genus. His work contributed to the development of a protocol for controlling the interchromosome level, which was experimentally evidenced by subsequent researches by others. Later, he worked on tomato and Drosophila (popularly known as fruit flies) and his studies assisted in the discovery of chemical mutagen specificity. He headed the wheat development programs of IARI and initiated three such programs to develop high-yielding varieties of wheat. Ribosomal synthesis in plant cells was another area of his researches. He is credited with developing the concept of national multilineal complex of varieties and the proposal of the multiple and inter-cropping patterns, later popularized by the Indian Agricultural Research Institute. He authored five books which included Plant Breeding: Mendelian to Molecular Approaches Genetics: Principles, Concepts and Implications, and Green Revolution: History, Impact and Future and several articles which document the body of his work. Jain has served as a member of the Scientific Advisory Committee (SAC-C) to the Government of India (1982–83) and the Uttar Pradesh State Planning Commission (1978–80). He chaired the Food and Agriculture Committee of the Bhabha Atomic Research Centre (1980–83) and the Indian chapter of the Man and the Biosphere Programme of the UNESCO (1978–83) and has been a member of the advisory committee on biotechnology of the Department of Science and Technology (1982–83). He chaired the consultative group on agriculture of the International Council for Science (ICSU) (1973) and is an Emeritus scientist of the Council for Scientific and Industrial Research, having been elected to the position in 1993. He also sat in the council of the Indian National Science Academy from 1979 to 1981 and served as the vice president of the National Academy of Agricultural Sciences from 2009 to 2011.

Books H. K. Jain (1999). Genetics: Principles, Concepts and Implications. Science Pub Inc. p. 438. ISBN 978-1578080540. H. K. Jain (1985). Indian Agriculture in 2000 AD. Indian National Science Academy. p. 45. LCCN 85904176. H. K. Jain (1989). Organization and structure in national agricultural research systems. International Service for National Agricultural Research. p. 49. LCCN 90129370. H. K. Jain (2010). Green Revolution: History, Impact and Future. The Green Revolution: History. ISBN 978-1-933699-63-9.{{cite book}}: CS1 maint: publisher location (link) H.K. Jain; M.C. Kharkwal (2012). Plant Breeding: Mendelian to Molecular Approaches. Springer Science & Business Media. ISBN 978-94-007-1040-5.

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Worked examples

Example 1 — a first encounter with Hari Krishan Jain

Start with the simplest possible case. Write down what Hari Krishan Jain 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 Hari Krishan Jain 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 Hari Krishan Jain 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 Hari Krishan Jain

In research: Hari Krishan Jain 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 Hari Krishan Jain 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: Hari Krishan Jain is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930 births, 2019 deaths, 20th-century Indian botanists, so understanding it makes those chapters shorter.
In everyday life: Look for Hari Krishan Jain 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 Hari Krishan Jain in 20 minutes

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

Frequently asked questions

What is Hari Krishan Jain in simple terms?

Why does Hari Krishan Jain 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 Hari Krishan Jain?

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 Hari Krishan Jain.