Science H.W Q.1 Differentiate between manure and fertilizers. Q.2 What are the advantages of manure? Q.3 Which bacteria helps in the nitrogen fixation?
Answers
Answer:
1. manure is a natural fertilizer whereas fertilizers consist of chemicals
2. they donot harm to soil fertilization
3. rhizobium bacteria helps in nitrogen fixation
Here ur answer
1)
Manures
1)It is a natural substance obtained by decomposition.
2)A manure is not very rich in essential plant nutrients.
3)A manure provide a lot of humus to the soil.
4)A manure is absorbed slowly by the plant .
5)They can be prepared in the fields.
Fertilizer
1)A chemical. fertiliser is a salt or an organic compound
2)Fertilisers are rich in plant nutrient like nitrogen, phosphorus or potassium.
3)Fertiliser does not provide any humus to the soil.
4)They are easily absorbed by the plants.
5)They are prepared in factories.
2.Ans :- Manure organic matter contributes to improved soil structure, resulting in improved water infiltration and greater water-holding capacity leading to decreased crop water stress, soil erosion, and increased nutrient retention.
3.Ans:- The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house the bacteria . The bacteria then begin to fix the nitrogen required by the plant