What are the greatest breakthrough in agriculture in class 9 biology chapter 5
Answers
Answer:
Nitrogen fixation, 1918: Fritz Haber wins a Nobel Prize for the ammonia-synthesis process “used to create a new class of fertilizers central to the green revolution.” 13. Refrigeration, 1850s: Food preservation, food safety and food transport took a monumental leap.
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Answer:
Q1. What do we get from cereals, pulses, fruits and vegetables?
Ans:
Cereals are the source of carbohydrate and is main reason of energy.
Pulses provide protein for growth and development
Vegetables and fruits are loaded with minerals, vitamins, carbohydrates, proteins and fats for overall development.
In-Text Question 1.2 Page 205
Q1. How do biotic and abiotic factors affect crop production?
Ans:
2 major factors that affect the crop are:
Biotic factors like insects, rodents, pests, and many more spread the disease and reduce crop production.
Abiotic factors like humidity, temperature, moisture, wind, rain, flood and many more destroy the crop raised.
Q2. What are the desirable agronomic characteristics for crop improvement?
Ans:
The essential agronomic features required for crop improvement are:
Profuse branching along with tallness in any fodder crop
Dwarfness in any cereals.
Explanation: