In which way can weeds negatively affect crop plants?
Crop plants get less resources
Crop plants get killed
Crop plants grow very close to each other.
Crop plants grow less
Why do we use insecticides?
To kill fungi
To kill weed
To kill insects
To increase fertility of soil
What type of fertilizers can give crops instant supply of minerals ?
Organic fertilizers
Inorganic fertilizers
Manure
Compost
Which of the following factors affects photosynthesis in plants?
Amount of light
Amount of oxygen
Amount of water vapor
Amount of weeds
How is fungi killed ?
By insecticides
By fertilizers
By pesticides
By fungicides
How can rate of photosynthesis be increased?
By planting more weeds
By regulating the amount of light, temperature and carbon dioxide
By adding more fertilizers
By planting more trees
What is DDT?
Dichloro diphenyl trichloroethane
Dichloro diphenyl trichloromethane
Dichloro diphenyl dichloroethane
Dichloro diphenyl trichlorobutane
Pests are killed by :
Fertilizers
Pesticides
Weeds are removed by:
fungicides
Insecticides
Herbicides
Where do all the foods we eat come from?
Plants
Chemicals
Animals
Factories
