Lime is known to have many positive effects, some of which can be unexpected. The proposed study will measure the effects of carbonate lime (CaCO3) and mixed lime (CaCO3 and Ca(OH)2) on all crops in a rotation (cereal, oilseed rape, canning peas, potatoes). The combined effects of liming on soil structure, plant nutrition, diseases and economics will be evaluated and the potential for maximising positive effects of liming and minimising negative effects will be determined. Liming will be combined with varied supply of plant nutrients in order to correct any nutritional disturbances caused by liming. The project is linked with an existing project studying liming in large-scale experiments in sugar beet. The present study will use a platform from that project, giving great coordination advantages. The research in the proposed project will concentrate on soils with a clay content of 20-25%.