@INBOOK {TITTONELL:2015, title = {Managing soil heterogeneity in smallholder African landscapes requires a new form of precision agriculture}, author = {Tittonell, P. and van Dis, R. and Vanlauwe, B. and Shepherd, K. }, editor = {Lal, R. and Stewart, B. A. }, series = {Advances in Soil Science}, year = {2015}, month = {August}, pages = {199--224}, chapter = {8}, publisher = {CRC Press}, isbn = {978-1-4822-4533-2}, note = {In: Lal, R and Stewart, B.A. (Eds.) Soil-Specific Farming: precision Agriculture. 431p.}, doi = {10.1201/b18759-9}, }