1. Alloway BJ (1995) Heavy metals in soils, 2nd edn. Blackie Academic and Professional, London
2. Andrivon D, Lucas J, Ellisseche D (2003) Development of natural late blight epidemics in pure and mixed plots of potato cultivars with different levels of partial resistance. Plant Pathol 52:586–94
3. Bouws-Beuermann H (2005) Effects of strip intercropping on late blight severity, yields of potatoes (Solanum tuberosum Lindl.) and on population structure of Phytophthora infestans. Dissertation, University of Kassel
4. Bruns C, Finckh MR, Dlugowski S, Leifert C, Hospers M (2003) Interaction between soil fertility management and varity specific characteristics with the infestation of potatoes with Phytophthora infestans. In: Freyer B (ed) Ökologischer Landbau der Zukunft. Beiträge zur 7. Wissenschaftstagung zum Ökologischen Landbau. Ökologischer Landbau der Zukunft, 24–26 Feb 2003, Wien. Institut für ökologischen Landbau an der Universität für Bodenkultur, Vienna, pp 145–148, www.orgprints.org/966/
5. Döring TF, Brandt M, Heß J, Finckh MR, Saucke H (2005) Effects of straw muluch on soil nitrate dynamics, weeds, yield and soil erosion in organically grown potatoes. Field Crops Res 94:249