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Improvement in Food Resources · MP Board (MPBSE) STD 9 (Madhya Pradesh - English Medium). 3 questions.

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3 questions · timed · auto-graded

Question 11 Mark
Blue green algae are used in the preparation of biopesticides. [True/False].
Answer
True.
Explanation:
Rhizobium, Azotobacter, Azospirillum and blue green algae$(BGA)$ have been traditionally used as Biofertilizers. Rhizobiuminoculant is used for leguminous crops such as pulses. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.
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Question 21 Mark
Watershed management is meant for distributing water for irrigation of fields. [True/False].
Answer
False.
Explanation: Watershed management is a term used to describe the process of implementing land use practices and water management practices to protect and improve the quality of the water and other natural resources within a watershed by managing the use of those land and water resources in a comprehensive manner.
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Question 31 Mark
Excess use of fertilisers can lead to water pollution [True/False].
Answer
True.
Explanation:
Fertilizer contains nutrients such as nitrogen and phosphorus. Excess amount of nutrients leads to algal growth. These algae uses oxygen in water. So this is harmful for aquatic life.
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