19.
Which of the following is a balanced source of plant nutrient?
Answer : C. NPK
20.
Which is an important chemical as it is used to manufacture fertilizers?
Answer : A. Ammonia
21.
Fertilizers which contain only one plant nutrient is called as
Answer : B. straight fertilizers
22.
Fertilizers which contain two or more nutrients in one compound are known as
Answer : B. complex or compound fertilizers
23.
Group of fertilizers are soluble in water and hygroscopic in nature is ___________
Answer : C. Nitrate fertilizers
24.
DDT stands for _________
Answer : A. Dichloro Diphenyl Trichloroethane
