Improvement In Crop Yields
Chapter Name : Improvement In Food Resources |
Sub Topic Code : 103_09_15_01_02 |
Topic Name : Improvement In Crop Yields |
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Sub Topic Name : Crop Variety Improvement |
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Introduction
Crop variety improvement - This approach depends on finding a crop variety that can give a good yield. Varieties or strains of crops can be selected by breeding for various useful characteristics such as disease resistance, response to fertilizers, product quality and high yields.
Pre-Requisites:
What is the importance of crop variety improvement
Activity:
videos which show why and how crop variety improvement is done.
Real Life Question:
Why is variety improvement required?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Variety improvement is done for following factors - 1) Higher yield | To increase the productivity. |
| Improved quality | Baking quality is important in wheat, protein quality in pulses, oil quality in oil seeds and preserving quality in fruits and vegetables. |
| Biotic and abiotic resistance: | biotic factors include - diseases, insects and nematodes and abiotic factors include -drought, salinity, water logging, heat, cold and frost. |
| Change in maturity duration | The shorter the duration of the crop from sowing to harvesting, the more economical is the variety. |
| Wider adaptability | to establish crop production at different environmental conditions. |
| Desirable agronomic characteristics | Tallness and profuse branching are desirable characters for fodder crops. Dwarfness is desired in cereals. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Real life uses :
increase in production of crops means there will be less shortage of food.
Places to visit :
farms, crop fields.
Practical examples around us
| Examples | Explainations |
|---|---|
| cereals | cereal crops are generally short in height compared to other crops. |
What you learn in Theory:
how and why crop variety improvement is done.
What you learn in Practice:
Why is crop variety improvement necessary