1. Krishna, K. R. Soil Potassium and its Transformation. In: Soil Fertility and Crop Production. Krishna, K. R. (Ed.) Science Publishers Inc.: Enfield, New Hampshire, USA, 2002b, 456.
2. Agrosphere
3. The Chemistry of Submerged Soils
4. Rosen, C.; Krishna, K. R. Nitrogen in Soil: Transformations and Influence on Crop Productivity. In: Soil Fertility and Crop Production. Krishna, K. R. (Ed.) Science Publishers Inc.: Enfield, New Hampshire, USA, 2002, 92-108.