The fertility of the soil is improved by________________?
Correct answer: D. All
- A. Rotation of the crops
- B. Adding lime to the acid salts
- C. Adding manure and growing legumes
- D. All
Explanation
Crop rotation prevents continuous depletion of the same nutrients, lime neutralizes acidic soil, and manure adds organic matter and nutrients. Leguminous plants also improve nitrogen content through nitrogen-fixing bacteria in their root nodules. Therefore all the listed practices can improve soil fertility, while choosing only manure overlooks the other mechanisms.
Last updated
About Polymers
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
Practise Industrial Chemistry
292 free Industrial Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A polymer in which three different monomers combine called_____________?
A polymer is a large molecule formed by
A thermosetting plastic differs from a thermoplastic in that a thermosetting plastic
_ are product of reaction of an alcohol and aromatic bi-functional acids.
Bakelite is a polymer of Formaldehyde and