Tag: improvement in food resources

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Questions Related to improvement in food resources

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizer are used for _______

  1. Ensure good vegetative growth (leaves, branches and flowers),

  2. Giving rise to healthy plants

  3. All of the above

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium, which are necessary for overall plant health, vegetative growth, and reproductive development.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizers gets washed away due to 

  1. Excessive irrigation

  2. Not fully absorbed by the plants

  3. Above A and B

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

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. They are artificially made but have a rapid response. Fertilizers are any solid, liquid or gaseous substances that are applied to the soil, directly on the plant (foliage) or added to aqueous solutions (as in fertigation) to maintain soil fertility, improve crop development, yield and/or crop quality. Sometimes fertilizers get washed away due to excessive irrigation and are not fully absorbed by the plants. Overuse of fertilisers can cause negative effects like loose soil fertility, bioaccumulation etc.

Thus, the correct answer is option C.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Fertilizers should be applied carefully in terms of .......... , for their complete utilisation.

  1. Proper dose

  2. Time

  3. Observing pre- and post-application precautions

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

Fertilisers, chemically synthesized substances which are rich in plant nutrients such as NPK. They are artificially made but have a rapid response. Overuse of fertilisers can cause negative effects like loose soil fertility, bioaccumulation etc. Fertilizers should be applied carefully in terms of proper dose, time, and observing pre and post-application precautions for their complete utilisation.

Thus, the correct answer is option D.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Why is organic manure considered better than fertilizers?

  1. It cannot be prepared in fields

  2. It is less rich in plant nutrients

  3. It improves the fertility and texture of the soil

  4. It decreases the water holding capacity of the soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Organic manure or organic fertilizer is made up of organic biodegradable waste like animal excreta and agriculture wastes. As it biodegradable it cannot harm the environment and increase the soil fertility it is better than chemical fertilizer. But chemical fertilizers are nutrient specific and prepared in chemical factories. Thus, the correct answer is option C.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Which of the following materials of biological origin are commonly used to maintain and improve soil fertility?

  1. Green manure

  2. Biofertilizers

  3. Bioinsecticides

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green manure and biofertilizers maintain and improve soil fertility. Green manure is prepared by the waste leaf from the plants. The waste leaf of the plant is mainly dumped in the soil which is further decomposed by bacteria of the soil.

Biofertilizers are prepared by the strains of microorganism which fix the essential nutrients for the soil.
So, the correct answer is option D.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Chemical derived from urea-melonic acid and used in inducing sleep is

  1. Diazepam

  2. Benzodiazepine

  3. Barbiturate

  4. Amphetamine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Diazepam is sold under the trade number of Valium. It belongs to family of benzodiazepines which are a type of tranquilizers. It is derived from urea and melonic acid. It is taken by mouth or injected intravenously. It produces a calming effect and used to treat anxiety, seizures and muscular spasms. It has sedative effects and thus, used before medical procedures. It is also used to treat insomnia i.e. lack of sleep because it induces sleep. 
So, the correct answer is 'Diazepam'.
Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?

  1. Fertilisers are eco-friendly.

  2. Fertilisers turn the fields barren after some time.

  3. Fertilisers remove the useful component from the soil.

  4. Fertilisers destroy the soil fertility.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pesticides and fertilizers are the chemically synthesized compound used for agriculture purpose. The use of pesticides and fertilizers over a long period of time can destroy soil fertility or soil structure by killing the soil microorganism that recycles nutrients in the soil as they are artificial chemical compounds. It also kills earthworms which are instrumental in making rich humus.

Therefore, the correct answer is option A.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Among the given options, which one is not correct for the use of a large amount of fertilizers and pesticides?

  1. Fertilizers are eco-friendly.

  2. Fertilizers turn the fields barren after some time.

  3. Fertilizers adversly affect the useful component from the soil.

  4. Fertilizers destroy the soil fertility.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fertilizers and pesticides are composed of chemical components. These chemicals are harmful to the soil and the environment. These fertilizers and pesticides if put in excess degrades the soil fertility and quality by destroying its natural properties. The chemicals from the fertilizers and insecticides make the soil acidic in nature which leads the soil to lose its fertility to become dry and barren. These chemicals also harm the natural soil tillers, decomposers and the organisms that naturally enhance the soil quality and fertility. Therefore adversely affecting the useful components of soil by depleting the natural nutrient of the soil like nitrogen, potassium and phosphorous, etc. Fertilizers cannot be eco-friendly as it harms the soil, water, and environment, unlike biofertilizers which are organic in nature and are eco-friendly too.
Therefore, the correct answer is option A.

Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Which of the following is not true for fertilisers?

  1. They increase the yield.

  2. Their excessive use disturbs the balance of nutrients in soil.

  3. They are generally used in small quantity.

  4. They are environment friendly.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The by-products of fertilizer industries are pesticides and some chemical fertilizers. They are non-biodegradable, so they get accumulated at each trophic level. These mix up with soil and water. From there, these pesticides are absorbed by the growing plants along with water and minerals.
When herbivores eat these, these poisonous chemicals pass into their bodies through the food chain. When carnivores eat herbivores, these pesticides transfer to their bodies. Man being omnivore, eats both plants and herbivores and these gets accumulators into their body.
Thus, pesticides enter the food chain at the producer level and in the process of transfer of food through food chains, these harmful chemicals get concentrated at each trophic level. This is called bio magnification.
Therefore, the correct answer is option D.
Multiple choice biology improvement in food resources manure manures and fertilisers role of organic manures in soil management

Which of the following statement is not true for organic manure?

  1. It enhances water holding capacity of soil

  2. It has a balance of all plant nutrients

  3. It provides humus to soil

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Manure is an organic substance produced by the decomposition of plant and animal wastes in the presence of the microorganism. 
  • Organic manure contains a few nutrients. It enhances the water holding capacity of soil. 
  • This makes more water available to plants. It has a balance of all plant nutrients. It provides humus (organic matter ) to soil. 

Therefore, option D is correct.