A region may be composed of undulatting soil.Logical formLearned from52 sentences. Soils can be polluted.Logical formLearned from52 sentences. A soil may be removed.Logical formLearned from52 sentences. A soil may be tilled.Logical formLearned from52 sentences. Soils can be in an area.Logical formLearned from52 sentences. Soils can be unsaturated.Logical formLearned from52 sentences. A soil may undergo an analysis.Logical formLearned from52 sentences. A soil can be degraded.Logical formLearned from52 sentences. A soil can be amended.Logical formLearned from52 sentences. A productivity may pertain-to a soil.Logical formLearned from51 sentences. Soils can be with drainage.Logical formLearned from51 sentences. A soil can be drained.Logical formLearned from51 sentences. A soil can be open.Logical formLearned from51 sentences. Soil may undergo a formation.Logical formLearned from51 sentences. A soil can be loosened.Logical formLearned from51 sentences.