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Agro Climate Zone
S. No |
Agro-climatic Zone |
Characteristics |
|
Southern agro-climatic zone |
The climate of the region is semi-arid tropic with an average annual rainfall of 830 mm. The station is having black soil, the depth ranging from0.6 to 1.2 m. The soil group is vertisol with clay loam and underlying canker nodules. |
Agro Ecological Zone |
Districts |
Rainfed
Area (LHa) |
Rainfall |
LGP
(days) |
Soil |
Specific Information |
I |
Virudhunagar, Tirunelveli, Thoothukudi |
2.62
(57.7 %) |
425 mm (NEM |
115 |
Black soil |
Unimodel rainfall
Single crop |
Soil type/s
S. No |
Soil type |
Characteristics |
Area |
1 |
Red loam |
Shallow to very deep, well drained with clay enriched B horizon and more of sesquioxide in the surface horizon, red to yellow in colour due to ferric oxides, variable in texture from loamy sand to clay loam, pH of 6.0 TO 7.5, shallow to deep depth, well drained, low in CEC and base saturation, low in organic matter, low in N,P,and high in K |
Rajapalayam
Watrap
Srivilliputhur
Taluks |
2 |
Lateratic Soil |
More of sesquioxide in the surface horizon, deeply weathered, high clay content, pH of 6.0 TO 6.8, with depth there is a decreasing intensity of red colour and cly content, defeicient in P due to high P fixing capacity, toxicity of Al and Mn, deficiency of K,Ca,Mg,Zn and B |
Tiruchuli
Kariappatti Taluks |
3 |
Black Soil |
Having high clay content, towards calcareous, pH of 7.8 to 9.4, have high CEC, high moisture holding capacity, black colour due to clay humus complexes, low in organic matter, low in N,P,and high in K |
Sattur,
Srivilliputhur
Aruppukkottai
Virudhunagar
Taluks |
4 |
Sandy Coastal Alluviam |
Recently formed,shows little or no horizonation, light coloured,Coarse in texture mostly sandy loam, pose problems of soil salinity and or sodicity,deficient in N.P and organic matter |
Narikkudi
Kariappatti
Taluks |
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