Tag: role of organic manures in soil management

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Questions Related to role of organic manures in soil management

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

Which of the following is not of the three plant macronutrients included in most fertilizers?

  1. O

  2. N

  3. P

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

The three primary plant macronutrients are Nitrogen (N), Phosphorus (P), and Potassium (K). Oxygen (O) is obtained by plants from the air and water, not typically added as a fertilizer macronutrient.

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

The high protein content of legumes(pluses) is correlated with.

  1. Application of fertilizers to the soil

  2. Nitrogen content of the soil

  3. Nitrogen-fixing bacteria present in the roots

  4. Their tropical or temperate origin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Legumes contain high amounts of protein because their root nodules host symbiotic nitrogen-fixing bacteria, such as Rhizobium. These bacteria convert atmospheric nitrogen into ammonia, which the plant uses to synthesize amino acids and proteins.

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

Which one of the following nutrients is not available in fertilizers ?

  1. nitrogen

  2. phosphorus

  3. iron

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

Nitrogen, phosphorus and potassium (NPK) are the major source available in fertilizers. The most common synthetic fertilizers used in India are super phosphate, urea, calcium ammonium nitrate, ammonium sulphate and NPK fertilizers. 

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

Fertiliser obtained from sea birds along the coast of Chile and Peru is

  1. Guano

  2. Bone meal

  3. Dung

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

Guano is the accumulated excrement of seabirds and bats. As a manure, guano is a highly effective fertilizer due to its exceptionally high content of nitrogen, phosphate and potassium: nutrients essential for plant growth.Seabird guano consists of nitrogen-rich ammonium nitrate and urate, phosphates, as well as some earth salts and impurities. Bat guano is faecal excrement from bats. Commercially harvested bat guano is used as an organic fertilizer. All commercially sold bat guano is derived from insect-eating bats.