Tag: improved methods of agriculture

Questions Related to improved methods of agriculture

Weeds compete in which of the following with crop plants.

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Sunlight

  2. Space

  3. Nutrients

  4. All of the above

Show answer
Correct Option: D
Explanation:

The unwanted plants which grow in field along with the crop plants are termed as weed. They are harmful for the crops as they compete for nutrients, space and sunlight with them.

___________ is an example of weeds.

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Wild oats

  2. Mango

  3. Lemon grass

  4. Oak

Show answer
Correct Option: A
Explanation:

The unwanted plants which grow in field along with the crop plants are termed as weed. They are harmful for the crops as they compete for nutrients with them.

Troublesome American water weed found in India is

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Eichhornia

  2. Trapa

  3. Cyperus

  4. Typha

Show answer
Correct Option: A
Explanation:

The  Eichhornia , commonly known as common water hyacinth, is an aquatic plant native to the Amazon basin, and is often a highly problematic invasive species outside its native range . It grows at an alarming rate and spreads on the surface of the water body. This cut out of the light and it also causes an increase in the oxygen demand. Thus, causing the death of fishes and other aquatic organisms. 

So the correct answer is 'Eichhornia' 

Congress grass is

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Cynodon dactylon

  2. Digitaria purpurea

  3. Cymbopogon citratus

  4. Parthenium hysterophorus

Show answer
Correct Option: D
Explanation:

Congress grass is the common name for Parthenium hysterophorus . It is a species of flowering plant in the aster family, Asteraceae. 

So the correct answer is 'Parthenium hysterophorus'

Which one is a troublesome weed of agricultural fields?

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. Chenopodium album

  2. Cyperus rotundus

  3. Parthenium hysterophorus

  4. Eichhornia crassipes

Show answer
Correct Option: C
Explanation:

Parthenium hysterophorus is commonly called as congress grass or gajar ghass .It is a species of flowering plant in the aster family, Asteraceae. It is native to the American tropics. This weed is equally dangerous for all flora and fauna. It is highly dangerous for humans. It utilizes most of  the nutritious substances from soils, thus converting fertile ground into unfertile ones.

So the correct answer is 'Parthenium hysterophorus'

Agent Orange consisted of

evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

  1. 2,4 - D

  2. 2,4,5-T

  3. Dioxin as contaminant

  4. All the above

Show answer
Correct Option: D
Explanation:
  • Agent Orange refers to a herbicide mixture which was used by the U.S. military during the Vietnam War and it contained a dangerous chemical contaminant called dioxin. 
  • The active ingredient of Agent Orange was an equal mixture of two phenoxy herbicides – 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5 trichlorophenoxyacetic acid (2,4,5-T) and it also contained traces of the dioxin 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD).
  • So the correct option is ' All of the above'.