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Agroclimatic divisions of India


01. Agroclimatic divisions of India
02. Major climatic regions of India in detail
03. Climatic regions by periodic climatic changes
04. Three quarter and one-half year growing climate regions
05. List of agro-climatic zones of India
06. State wise sub zones-Gujarat, Haryana, HP, J&K, Karnataka, Kerala
07. State wise sub zones- Madhya Pradesh, Tamil Nadu ect.
08. State wise sub zones- Uttar Pradesh, West Bangal and North East

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You are reading article on Agroclimatic divisions of India

Article on Agroclimatic divisions of India- Agricultural Meteorology


I. Introduction
II. Climatic Divisions of India
    A. Based on potential evapo-transpiration
    B. Based on periodic climate change
III. List of Agro-climatic Zones of India
IV. Conclusion


Agriculture is determined by the climate. In other words, climate is the key factor in any operation of agricultural production right from field preparation to marketing. The success and failure of farming is closely associated with the prevailing weather conditions. Hence, it is possible to optimize the farm production by adjusting the cropping patterns and agronomic practices to suit the climate of an area if we have a fairly good knowledge about the agro climatic regions of our country. Closely related are the division of agro-ecological regions of our country. In many instances these divisions may be same or very similar. Therefore, the reader is advised to study the article on Agroecological Regions of India. So by knowing climate of a particular area, it would be possible to plan the production strategies suitable to that area in a better way. This article provide useful information and list of different agro-climatic regions of the country.

Introduction to agro-climatic divisions of India


Agro-meteorology, abbreviated from Agricultural Meteorology and also referred to as Agro-climatology, has been defined in several ways. The name itself implies that it is the study of those aspects of meteorology which have direct relevance to agriculture. Agrometeorology puts the science of meteorology to the service of agriculture, in its various forms and facets, to help the sensible use of land, accelerate production of food and to avoid the irreversible abuse of land re- sources.

The task of an agrometeorologist is to apply every relevant meteorological skill to help the farmer to make the most efficient use of his physical environment for improving agricultural production both in quality and quantity.

To have a better understanding of the agro-climatic divisions of India the reader is advised to study also the article - Agro-ecological Regions of India.

Climatic Divisions of India


To work out the suitable cropping plan for field crops in different agro-climatic regions of the country, it is essential to .know how the country is divided into homogeneous climatic regions. Sub-divisions can be formed on the basis of (a) potential evapo-transpiration, or on the basis of the (b) periodic occurrence of temperature conditions favourable for the growth of annual crops.

A. Based on potential evapo-transpiration


Under this climate has been classified on the basis of potential evapo-transpiration which represents a climatic index of plant development and a heat index of the agro- climate, soil moisture supply, plant cover and soil management. Among these, first two are of far greater importance than the other factors. According to this classification, the country may be divided into four climatic regions, as detailed in table

Climatic regions of India

S.NO. Climatic Type Index or potential Evapo- transpiration Region & State covered
1. Arid -40 to -60 West Rajasthan
2. Semi-Arid -20 to -40 Northern & Eastern Rajasthan, Gujarat, Marathwada, Mysorte, Rayalaseema, Punjab, Delhi, Western U.P
3. Sub-humid -20 to +20 Central U.P, Western & Central M.P, Vidarbha, Eastern U.P, Bihar, Sub-mountain tracts of U.P, H.P., West Bengal and nilgiri
  humid +20 to 100 Konkan, Kerala, Coastal Madras, Assam, Orissa, West Bengal, Eastern M.P and coastal Andhra Pradesh

Each of these regions are further explained in the next articles.



Next : Major climatic regions of India in detail
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