"Soil management" . . "Soil classification" . . "Jordvand" . . "Relations plante-sol." . . "Dyb jordbehandling" . . "Soil water" . . "Edafologia." . . "Jordbundsforurening" . . "Reduceret jordbearbejdning" . . "Subsoiling" . . "Jordbundsforringelse" . . "Plove" . . "Finney, J. B." . . "Planteernæring" . . "Plant nutrition" . . "Jordbund" . . "Boden." . . "Drainage" . . "Kulturteknik" . . "Ploughs" . . "Soil structure" . . . . "Dræning" . . "Jordbehandling, jordbearbejdning" . . "Cultivators" . . "Zero-tillage" . . "Tillage" . . "Sols Préparation." . . . . . . . . . . . "Soil: the farmer's raw material. Plant nutrition: the major elements. Plant nutrition: the minor nutrient. Soil water. Land drainage. Soil structure and crop performance. Soils and traction. Traffic and soil damage. Ploughs and ploughing. Cultivation implements. Cultivation implements. Power requirements and work rates. Subsoil cultivations. Soil organic matter. Cultivation systems for crop and soil. Minimal cultivations and direct drilling. Erosion. Pollution and the soil. The classification of agricultural land." . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Soil Management" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Soil management" . "Soil management"@en . . . . . . . . . . . . . . . "Soil deterioration" . . "Kultivatorer" . . "Solo (manejo e conservacao)" . . "Organisk stof" . . "Soil" . . "Soil." . "Soil pollution" . . "Erosion" . . "Bodennutzung." . . "Jordbundsklassificering" . . "Bewirtschaftung." . . "Jordstruktur" . . "Pédologie." . . "Organic matter" . . "Sols Fertilité." . . "Sols Fertilité" . "Eagle, D. J." . .