food kq2 green revolution

Question 1

characterisitics of high yielding varieties

Answer 1

1. shorter growth period
2. more grains per plants
3. shorter height
4. more resistant to plants and pests
5. grows to uniform heights

Question 2

how HYVs help (yield)

Answer 2

1. shorter growth period = less days to grow and ripen = can grow and harvest crops at least twice a year = higher yield each year
2. more grains per plants: each plant has multiple stalks and more grains per stalk = more grains per plant = higher yield
3. shorter height = less likely to get damaged and less resources to grow a shorter height = produce more grains = higher yield
4. more resistant to pests and diseases = less crops destroyed = more crops for harvesting = higher yield

higher yield = higher output er unit area = higher food productivity, more intense food productivity

Question 3

how HYVs help (labour)

Answer 3

grow to similar/uniform height = easier to use machines to harvest crops = less labour required = less labour per unit area = higher food productivity

Question 4

modern irrigation methods

Answer 4

(since some countries do not experience constant wet season all year)

water from irrigation provides sufficient water for crop growth throughout year = need not rely on rainfall season only for water = grow and harvest crops at least twice a year = higher yield = higher output per unit area = higher food productivity, more intense food production

Question 5

usage of chemical fertilisers

Answer 5

Chemical fertilisers added = soil fertility can be increased/maintained =
Farms need not be left to fallow after a
harvest.
⇩
Farmers can do
double-cropping.
+
The soil is fertile = Sufficient nutrients
for crops.
⇩
Crops will grow well
⇩
Higher yield = higher output per unit area = more intense food production, higher food productivity

Question 6

usage of chemical pesticides

Answer 6

pesticides used = kills the pests
⇩
Less Pests in farms
⇩
Less crops destroyed
⇩
More crops harvested
⇩
Higher yield = higher output per unit area = higher food productivity, more intense food production

Question 7

use of mechanisation

Answer 7

machines make work more efficient = less labour will be required to produce the same output = lower labour needed per unit area = Higher food productivity