Tag: role of organic manures in soil management

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Questions Related to role of organic manures in soil management

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

Why is vivipary an undesirable character for annual crop plants?

  1. It reduces vigour of the plant

  2. It adversely affects the fertility of the plant

  3. The seeds exhibit long dormancy

  4. The seeds connot be stored under normal conditions for next season
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vivipary is the germination of seeds while still attached to the parent plant. In annual crops, this is undesirable because it prevents the normal dormancy period required for storage and handling, making the seeds difficult to manage for the next season.

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

Which of the following is true for Cash crop farming?

  1. Cash crop farming is for profit

  2. Monocropping or sole cropping, which is the growing of a single crop on a piece of land, is

    common with cash crop

  3. It is called commercial farming

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Explanation: A cash crop is an agricultural crop which is grown for sale to return a profit. It is typically purchased by parties separate from a farm. The term cash crop is applied exclusively to the agricultural production of plants; animal agriculture is not a part of the terminology.

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

A crop plant which can grow in nitrogen deficient soils without external supply of it is?

  1. Allium sativum

  2. Gossypium herbaceum

  3. Cajanus cajan

  4. Helianthus annus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cajanus cajan, commonly known as pigeon pea, is a legume. Legumes have a symbiotic relationship with nitrogen-fixing bacteria in their root nodules, allowing them to thrive in nitrogen-deficient soils.

Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

Which of the following plants is used to extract the blue dye?

  1. Trifolium

  2. Indigofera

  3. Lupin

  4. Cassia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The name of the plant is Indigofera tinctoria , which is under the family fabaceae.  This plant is used to produce blue denim jeans. On average a single pair of blue denim jeans need 3-12 gram of indigo.

This plant is required to do dye wool and silk products. This plant is normally found in tropical area. Indigo is very safe for the human skin and it is also chemical free.
Correct answer is B.
Multiple choice evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

_____________ is a practice of clearing and burning the forest area for cultivation of crops for 3-4 years and shifting.

  1. Jhum cultivation

  2. Horticulture

  3. Taungya cultivation

  4. Agrisilviculture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Jhum cultivation, also known as slash-and-burn agriculture, involves clearing forest patches by cutting and burning vegetation to create temporary fields for crop cultivation.

Multiple choice biology natural resources and agriculture manure manures and fertilisers role of organic manures in soil management

When a fertilizer contains at least two or more nutrients is called as _____ fertilizer.

  1. Simple

  2. Complex

  3. Chemical

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Complex fertilizers (also known as compound fertlizers) are made from mixing two or more of macro-nutrient type fertilizers. They may also be further blended with elements that provide some of the less-common plant nutrients (known as secondary or trace nutrients, such as sulfur, calcium and magnesium).

Thus, the correct answer is option B.

Multiple choice evs agriculture- crops manure manures and fertilisers role of organic manures in soil management

In high yielding `hybrid crop varieties', to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year, because

  1. They are not allowed to grow their own seed

  2. The hybrid vigour is lost due to inbreeding depression

  3. The government of India has accepted Dunkel's proposals

  4. It is cheaper to purchase fresh seed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hybrid seeds are the result of crossing two genetically distinct inbred lines. If seeds from these hybrids are saved and replanted, the offspring show segregation, leading to a loss of the uniform, high-performing traits known as hybrid vigour.