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Citation: Wg. Wielemaker et al., Significance and application of the multi-hierarchical landsystem in soil mapping, CATENA, 43(1), 2001, pp. 15-34

Authors: Casanova, D Goudriaan, J Bouma, J Epema, GF

Citation: D. Casanova et al., Yield gap analysis in relation to soil properties in direct-seeded floodedrice, GEODERMA, 91(3-4), 1999, pp. 191-216

Authors: Tromp, M Epema, GF

Citation: M. Tromp et Gf. Epema, Spectral mixture analysis for mapping land degradation in semi-arid areas, GEOL MIJNB, 77(2), 1998, pp. 153