Are these equations specific to acidic soils only?
Are there equations for alkaline soils ?
Soil Fertility Index (SFI) = pH + organic matter (%, dry soil basis) + available P (mg kg-1 dry soil) + exch K (cmolckg-1) + exch Ca (cmolckg-1) + exch Mg (cmolckg-1)-exch Al (cmolckg-1)
Soil Evaluation Factor (SEF) = [Exch K (cmolckg-1) + Exch Ca (cmolckg-1) + Exch Mg (cmolckg-1)-log(1 + exch Al (cmolckg-1)] × organic matter (%, dry soil) + 5
Dear Dr Shantanu Bhunia
I have some researches on acid soils
Do you have researches at alkaline soils ?
SFI and SFE have been studied under forest based land use, tree based land use, cropping system, soil depth , acidic and alkaline soil.
please refer to these articles
1.Communication in soil Soil Sci and pl. analysis.2011, 42: 2724-2737
2. J Pharmaconosy and Phytochemistry. 2018, 7(5): 2813-2821
I also agree with Dr Sunita Gaind. Since these are the indices that could be applied in any types of soil. The values may be of different for different types of soils. Accordingly, inferences would also differ as well as explanations.
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