Thresholds (Doorsills) (1) Surveys (1) Plant species (1) Andropogon (1) Notions (Philosophy) (1) Year (1) Value (1) Upper class (1) Respect (1) Reality (1) Production (Economic theory) (1) Plants (1) Physics (1) Peasants (1) Love grass (1) Indicators (Biology) (1) Elite (Social sciences) (1) Earth (Planet) (1) Cycles (1) Culture (1) Concepts (1) Botany (1) Anus (1) Traditional farming (1) Management (1) Technique (1) Speed (1) Soils (1) Evolution (1) Land tenure (1)