Different Agro-ecological Zone (AEZ): Bangladesh
>> Monday, July 20, 2009
There are 30 AEZ in Bangladesh. Emphasis is given to soil properties in relation to land use and agricultural development.
I. Physiography (land forms and soil parent materials)
II. Depth and duration of seasonal flooding
III. Climate-
b) Rainfall duration
c) Occurrence of temperature etc.
Ecological / Environmental hazard: Ecological factors which influence crop production are-
I. Climatic factors (related to aerial environment)
III. Physiographic factors (topographical factor)
IV. Biotic factor
These ecological factors are interrelated and intricately mixed. They work through one another acting and reacting together may bring about a change in local climate and in turn may affect the soil and competition impress.
Differences between physiographic units and soil types:
1. Emphasis is given on the process of soil formation.
2. This is the non-technical grouping of soils.
3. A total of 21 general soil types have been recognized in Bangladesh.
4. It is not necessary to maintain the order.
1. Emphasis is given to soil properties in relation to land use and agricultural development. 1. Emphasis is given on the process of soil formation.
2. This is the technical grouping of soils. 2. This is the non-technical grouping of soils.
3. A total of 23 physiographic units have been recognized in Bangladesh. 3. A total of 21 general soil types have been recognized in Bangladesh.
4. In writing physiographic units order must be maintained. 4. It is not necessary to maintain the order.
General soil types
1. Emphasis is given on the process of soil formation.
2. This is the non-technical grouping of soils.
3. A total of 21 general soil types have been recognized in Bangladesh.
4. It is not necessary to maintain the order.
Written By:
Md. Harun- AR Rashid
Regional Agricultural Officer
Mbrara, Uganda.
email: universityjournal@gmail.com
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