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Rice–duck farming

Rice–duck farming is a science 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 Rice–duck farming rather than just read about it. In short: Rice–duck farming is the polycultural practice of raising ducks and rice on the same land. It has existed in different forms for centuries in Asian countries including China, Indonesia, and the Philippines, sometimes also involving fish.

Rice–duck farming — main illustration
Rice–duck farming — illustration

Key takeaways

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

Reference excerpt

Rice–duck farming is the polycultural practice of raising ducks and rice on the same land. It has existed in different forms for centuries in Asian countries including China, Indonesia, and the Philippines, sometimes also involving fish. The practice is beneficial as it yields harvests of both rice and ducks. The two are in addition synergistic, as the rice benefits from being weeded and fertilized by the ducks, and having pests removed, while the ducks benefit from the food available in the rice paddy fields, including weeds and small animals.

Systems

In 2010, Asia produced around 90% of the world's rice, and in 2012 some 80% of all duck meat. Asian farmers had a tradition of fattening ducks on rice paddies, though this was achieved in different ways. Integrated rice–duck farming uses hybrid ducks such as Aigamo that avoid eating the leaves of rice plants. Such mutually beneficial polycultural systems have been described as permacultures.

In 2001, rice–duck farming was introduced to Bangladesh, where the practice had been very limited. By 2004, it had been established in over 40 villages, either on small farms or on a "community basis" within a village.

Analysis

Advantages The ducks eat weeds, preventing those plants from competing with the rice and limiting its growth. This reduces the need for herbicides, saving money and the labour of spraying, and reducing environmental harms such as eutrophication of waterways. Duck manure fertilizes the paddy fields, reducing the need for artificial fertilizers, again saving money and labour. Both soil nutrients and water parameters including nitrate, dissolved organic matter, dissolved oxygen, and suspended solids are higher because of duck manuring and dabbling in the soil, raising production and farm profits in comparison to rice farming without ducks (or fish).

Disadvantages The addition of ducks requires labour and either a duck herder or additional fencing on the farm. Depending on the system, it may require the field to be more carefully managed, such as being flooded to the exact depth needed for ducks to swim freely but still able to dabble on the bottom.

See also Rice–fish system Takao Furuno, rice–duck farm pioneer in Japan

References

Illustrations

Rice–duck farming: Indian Runner ducks with free access to rice paddies in Bali, Indonesia provide additional income and manure the fields, reducing the need for fertilizer.[1]
Indian Runner ducks with free access to rice paddies in Bali, Indonesia provide additional income and manure the fields, reducing the need for fertilizer.[1]
Rice–duck farming: Balinese painting, c. 1940, in traditional style, depicting paddy fields with ducks foraging for food
Balinese painting, c. 1940, in traditional style, depicting paddy fields with ducks foraging for food
Rice–duck farming: A farmer grazes his ducks in the Ngendrosari rice fields, Kajoran, Magelang, Central Java
A farmer grazes his ducks in the Ngendrosari rice fields, Kajoran, Magelang, Central Java

Worked examples

Example 1 — a first encounter with Rice–duck farming

Start with the simplest possible case. Write down what Rice–duck farming 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 Rice–duck farming 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 Rice–duck farming 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 Rice–duck farming

In research
Rice–duck farming 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 Rice–duck farming 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
Rice–duck farming is common in secondary-school and first-year university syllabi. It links to neighbouring topics Agriculture in Asia, Polyculture, Rice, so understanding it makes those chapters shorter.
In everyday life
Look for Rice–duck farming 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 Rice–duck farming in 20 minutes

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

Frequently asked questions

What is Rice–duck farming in simple terms?

Rice–duck farming is the polycultural practice of raising ducks and rice on the same land. It has existed in different forms for centuries in Asian countries including China, Indonesia, and the Philippines, sometimes also involving fish.

Why does Rice–duck farming 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 Rice–duck farming?

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 Rice–duck farming.

Tags

  • Agriculture in Asia
  • Polyculture
  • Rice

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