Raw data files for study of the effects of biochar on growth and elemental content of four crops: carrot, lettuce, soybean and sweetcorn. Plus additional files on biochar and soil characteristics. This dataset is associated with the following publications: Olszyk, D., T. Shiroyama, J.M. Novak, K.B. Cantrell, G. Sigua, D.W. Watts, and M. Johnson. Biochar affects growth and shoot nitrogen in four crops for two soils. Agrosystems, Geosciences & Environment. John Wiley & Sons, Inc., Hoboken, NJ, USA, e20067, (2020). Olszyk, D.M., T. Shiroyama, J.M. Novak, K.B. Cantrell, G. Sigua, D.W. Watts, and M.G. Johnson. Biochar Affects Essential Elements of Carrot Taproots and Lettuce Leaves. HORTSCIENCE. American Society for Horticultural Science, 55(2): 261-271, (2020).