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Back to Practice Questions
General AwarenessAgriculture
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Which of the following crops is categorized as a leguminous crop, often used for nitrogen fixation in soil?

A

Wheat

B

Rice

C

Soybean

D

Maize

Correct Answer

ЁЯУЪ GK тАв GK Fact & ContextGeneral AwarenessAgriculture
Option C

Soybean

Quick Summary:

Soybean is a leguminous crop that houses symbiotic bacteria called Rhizobium in its root nodules, which convert atmospheric nitrogen into ammonia to fertilize the soil ┬╖ This process, known as biological nitrogen fixation, enhances soil fertility and reduces the dependency on chemical fertilizers.

ЁЯУЪGKGK SolutionFact & Context
ЁЯТб Explanation

Soybean is a leguminous crop that houses symbiotic bacteria called Rhizobium in its root nodules, which convert atmospheric nitrogen into ammonia to fertilize the soil ┬╖ This process, known as biological nitrogen fixation, enhances soil fertility and reduces the dependency on chemical fertilizers.

ЁЯПЫя╕П Static GK Anchor & Permanent Background

Nitrogen fixation in plants is governed by the biological process of the nitrogen cycle, which is a fundamental concept in Geography/Ecology under the Earth's nutrient distribution systems.

ЁЯУМ Key Points
  • тЦ╕

    Soybean is a Kharif crop that belongs to the family Fabaceae.

  • тЦ╕

    Rhizobium bacteria perform a symbiotic relationship with legumes to fix atmospheric nitrogen.

  • тЦ╕

    Crop rotation with leguminous crops is a common practice to restore soil nitrogen levels naturally.

ЁЯУД Additional Information
  • тЦ╕

    Soybean is often referred to as 'yellow gold' or 'miracle bean' due to its high protein and oil content.

  • тЦ╕

    Wheat and Maize are classified as cereals and belong to the Poaceae family, which do not fix nitrogen.

  • тЦ╕

    Rice is a semi-aquatic cereal crop that requires large amounts of water and does not possess nitrogen-fixing root nodules.

  • тЦ╕

    Option A (Wheat) and Option B (Rice) are staple cereal crops, not legumes.

ЁЯУК Diagram / Illustration
Leguminous Crops & Nitrogen Fixation1Crop CategorizationSoybean belongs to the Fabaceae family and is a key leguminous crop.2Symbiotic AssociationRoot nodules house Rhizobium bacteria for mutual benefit.3Nitrogen Fixation ProcessConverts atmospheric nitrogen into ammonia to enrich soil fertility.4Agronomic AdvantageNatural restoration of soil nitrogen reduces chemicalfertilizer use.Correct Option: C) Soybean
тЬЕ

C is correct тАФ Soybean is a leguminous crop that enhances soil nitrogen levels through its symbiotic relationship with nitrogen-fixing bacteria.

Core Concepts Used
Click any tag to open in AI Tutor
Biological Nitrogen Fixation Leguminosae Family Soil Fertility Management
ЁЯТб EXAM TIP

When studying agricultural geography, remember that leguminous crops like soybean, pulses, and groundnut are vital for sustainable farming, frequently tested alongside soil types and crop seasons (Kharif/Rabi).

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