Summary
A chemical measure of soil nitrogen (N) availability has been evaluated. The method involved the estimation of initial mineral N, plus mineralizable N released with 0.05N KMnO4 in 1NH2SO4. The results obtained correlated highly significantly with the N uptake by wheat plants (r=0.72,P<0.01).
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Hussain, F., Malik, K.A. & Azam, F. Evaluation of acid permanganate extraction as an index of soil nitrogen availability. Plant Soil 79, 249–254 (1984). https://doi.org/10.1007/BF02182347
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DOI: https://doi.org/10.1007/BF02182347