Transcript PPT - icrisat

Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
After successful completion of this Module, you
have learned to answer the following questions for
each of the 6 crops discussed in this Module:
1. How much of rainfall is required to provide
sufficient moisture for good growth and
yield of these crops?
2. What are the critical stages of growth of
these crops to rainfall (moisture)?
3. What temperature conditions are suitable
for different growth stages of these crops?
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
The 6 Lessons in this Module cover the following
crops.
Lesson 1: Millets (Sorghum, Pearl Millet, etc.)
Lesson 2: Groundnut
Lesson 3: Pigeonpea
Lesson 4: Chickpea
Lesson 5: Maize
Lesson 6: Rice
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
Lesson 5: Climatic Requirements of Maize crop
After successful completion of this Lesson,
you will be able to answer:
1. How much of rainfall is required to provide
sufficient moisture for good growth and
yield of Maize crop?
2. What are the critical stages of growth of
Maize crop when rainfall (moisture) is
important?
3. What temperature conditions are suitable
at different growth stages of Maize crop?
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
Lesson 5: Climatic Requirements of Maize crop
Water relations:
• Requires considerable amount of moisture;
• 50-75 cm of well-distributed rain is
conducive to proper growth;
• Expends water economically and relatively
drought - resisting crop.
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
Lesson 5: Climatic Requirements of Maize crop
Water relations:
• After germination and up to tasseling
stage crop stands less moisture;
• Requires more moisture during
reproductive period;
• Requires less moisture when developing
towards maturity.
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
Lesson 5: Climatic Requirements of Maize crop
Temperature:
• A warm weather crop;
• Requires a mean temperature around
22oC and night temperature above 15oC;
• Requires considerable warmth from
germination to flowering;
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
Lesson 5: Climatic Requirements of Maize crop
Temperature:
• Cultivation not possible when day
temperatures are less than 19oC and
night temperatures during the first 3
months falls below 21oC;
• Noon temperature above 35oC for
several days destroys pollen and yields
are drastically reduced.
Course on Crop-Weather Relationships
Module V: Climatic Requirements of Some Crops
Virtual Academy for the Semi Arid Tropics
This concludes Lesson 5: Climatic
Requirements of Maize crop - in this
Module.
The last Lesson in this module is about
the Climatic Requirements of rice crop.
Select Lesson 6 from Module V contents
Course on Crop-Weather Relationships