Availability indices of calcium and magnesium in soils of Kerala

Bhindhu P.S., Sureshkumar P.

Abstract


Calcium and magnesium are indispensible as secondary nutrients for plant growth. Availability of these nutrients to plants depends on the form and quantity present in soil. Soils of Kerala pose the problem of acidity due to high rainfall and leaching of bases causing widespread deficiency of these nutrients. A study was conducted to characterize the soils of the state with respect to availability indices and major fractions of calcium and magnesium contributing to plant available pool. The availability of calcium and magnesium increased with pH, cation exchange capacity and decreased with increase in exchangeable aluminium. The mean per cent contribution of different fractions to total calcium was in the order exchangeable > mineral > acid soluble > water soluble > organic complexed, whereas in the case of magnesium, it was mineral > acid soluble > exchangeable > water soluble > organic-complexed fractions. Exchangeable calcium and water soluble magnesium were the sole forms contributing directly to the available pool.


Keywords


Calcium, magnesium, fractions, available pool

Full Text:

PDF

References


Ananthanarayana R and Rao B V V. 1979. Studies on dynamics of magnesium in soils and crops of Karnataka. I- Magnesium fractions in soils. Mysore J. Agric. Sci. 13(4): 416-417.

Baruah B K, Das B, Haque A, Medhi, C and Misra A K. 2011. Sequential extraction of common metals (Na, K, Ca and Mg) from surface soil. J. Chem. Pharm. Res. 3(5): 565-573.

Beena V I and Thampatti K C M. 2013. Characterization of acidity in acid sulphate soils of Kerala. J. Life Sci. 7(8): 907-912.

Chandran P, Ray S K, Bhattacharyya T, Srivastava P, Krishnan P and Pal D K. 2005. Lateritic soils of Kerala, India: their mineralogy, genesis, and taxonomy. Aust. J. Soil Res. 43: 839–852.

Cox, F. R. 1987. Micronutrient soil tests. Correlation and calibration. In: Brown, J. R. (ed.), Soil Testing: Sampling, Correlation, Calibration and Interpretations. SSSA, Madison, pp. 97-117.

Hailes K J, Aitken R L and Menzies N W. 1997. Magnesium in tropical and subtropical soils from north-eastern Australia. I. Magnesium fractions and interrelationships with soil properties. Aust. J. Soil Res. 35: 615-627.

Halstead R L, MacLean A J and Nielsen K F. 1958. Ca: Mg ratios in soil and the yield and composition of alfalfa. Canadian J. Soil Sci. 38: 85-93.

Jackson, M. L. 1958. Soil Chemical Analysis. Prentice Hall of India Private Ltd., New Delhi, 498p.

Jayaganesh S, Venkatesan S, Senthurpandian V K and Poobathiraj K. 2011. Vertical distribution of magnesium in the laterite soils of south India. Int. J. Soil Sci. 6(1): 69-76.

Jones D L. 1998. Organic acids in the rhizosphere - a critical review. Plant Soil 205: 25-44.

Krishnan P, Venugopal K R and Sehgal J. 1996. Soil Resources of Kerala for Land Use Planning. NBSS Publ. 486. National Bureau of Soil Survey and Land Use Planning, Nagpur, India.

Mokwunye A U and Melsted S W. 1972. Magnesium forms in selected temperate and tropical soils. Soil Sci. Soc. Am. Proc. 36: 762-764.

Nair K M, Anilkumar K S, Srinivas S, Sujatha K, Venkatesh D H, Naidu L G K, Sarkar D and Rajasekharan P. 2011. Agro-ecology of Kerala, NBSS Publ. No. 1038. National Bureau of Soil Survey and Land Use Planning, Nagpur, India, 408p.

Nair, K. M., Sureshkumar, P. and Narayanankutty, M. C. 2013. Soils of Kerala. In: Rajasekharan, P., Nair, K. M., Rajasree, G., Sureshkumar, P., Narayanankutty, M. C. (eds), Soil Fertility Assessment and Information Management for Enhancing Crop Productivity in Kerala. Kerala State Planning Board, Thiruvananthapuram, pp. 72-92.


Refbacks

  • There are currently no refbacks.


A KAU publication [CODEN: JTAGEI; ISSN 0971-636X; eISSN 0973-5399]