This presentation will help you to understand what is drought, drought types, Crops on the basis of drought and mechanisms of crops to overcome drought

1. Presentation Topic:
Crops on the basis of drought

2. Drought:
A prolonged period of abnormally
low rainfall, leading to a shortage of
water.
A drought can last for months or
years, or may be declared after as few as
15 days.

3. Types of Drought:
1.Agricultural drought
2.Meteorological drought
3.Hydrological drought
4.Socioeconomic drought

4. Agricultural drought:
Agricultural drought refers to circumstances when soil
moisture is insufficient and results in the lack of crop growth and
production.
• Concerns with short-term drought situations.
Cause:
• Atmospheric moisture minimized
• Soil moisture decrease

5. Crops on the basis of drought:
• Drought avoiding crops
• Drought tolerant crops
• Drought resistance crops

6. Drought avoidance Plants
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'Drought avoidance' is the ability of plants to maintain
(relatively) higher tissue water content despite reduce water
content in the soil.
Called as annuals or ephemerals.
Adaptive traits:
• Minimization of water loss
• Optimization of water uptake

7. Ephemeral Plants:
Ephemeral plants mature in a single season investing all their
energy into reproduction instead of long-term survival included
desert, spring and mud flat plants.
Example:
Mojave Aster (Xylorhiza tortifolia)

8. Drought tolerant Plant:
It is the ability to which a plant maintains its biomass
production during arid or drought conditions.
Protection mechanisms:
• Desiccation tolerance
• Detoxification
• Repair of xylem embolism
Examples:
• Corn
• Wheat
• Rice

9. Drought resistance:
Mechanism causing minimum loss of yield in a water deficit
environment relative to the maximum yield in a water constraint
free management of the crop.
Example:
Staple food crops are:
• Sorghum
• Sweet potato
• Cowpea
• Groundnut

10. Mechanism:
• Deep root system
• Curtailed water loss by increasing diffusive
resistance
• Succulent leaves

12. Drought management cycle:
1) Normal stage – mitigation
1. Strengthen resource management
2.Develop infrastructure
3.Promote income generation
4.Plan contingencies
5.Education planning
2) Alert stage - preparedness
1.Strategically stockpile cereals
2.Rehabilitate critical boreholes
3.Promote livestock marketing
4.Intervene in human and animal health
5.Provide supplementary feed for livestock

13. 3) Emergency stage - response and relief
1.Intervene in human and animal health
2.Provide emergency water supplies
3.Provide supplementary food for vulnerable groups
4) Recovery stage - reconstruction
1.Restock
2.Rehabilitate dams
3.Build capacity
4.Develop infrastructure
5.Food-for-work
6.Natural resource management