| A | B |
|---|
| HUMUS | Decayed plant &animal remains |
| SUBSOIL | Soil layer made of clay & particles |
| DECOMPOSERS | Organisms that break down organic waste. |
| BEDROCK | Layer of rock beneath the soil |
| TOPSOIL | Dark brown soil mix of humus,clay&minerals. |
| LOAM | Soil from clay sand and silt. |
| SOIL HORIZON | Soil layer that differs from the layers around it. |
| SOIL | The surface material in which plants can grow |
| LITTER | Leaves or other plant material on top of the soil. |
| NITROGEN (N) | First letter on a fertilizer bag and helps make plants green |
| PHOSPHOROUS (P) | The second letter on a fertilizer bag that helps plants increase fruit development and produce a strong root system |
| POTASSIUM (K) | The third number on a bag of fertilizer that helps with flower colour and size |
| SALINIZATION | Buildup of salts in soil due to too little vegetation and excess irrigation |
| ZERO TILLAGE | Stubble from last year's crop is left behind to prevent soil erosion |
| SHELTERBELTS | Rows of trees planted around farms to reduce soil erosion by wind |
| HYDROPONICS | Method of using gravel and nutrient-rich liquids in stead of soil to grow plants |
| CLEAR-CUTTING | Removing all species of trees in a area |
| SELECTIVE HARVESTING | Rmoving only certain trees or species of trees |
| DESERTIFICATION | Where desert has taken over agricultural land due to soil erosion |
| IRRIGATION | The use of systems of large pipes and sprinklers to add water and nutrients to the soil |
| MONOCULTURE | Planting of only one type of crop in a field |
| SUSTAINABILITY | Being able to grow plants for food and fibre while keeping our natural systems healthy over the long term |
| SATURATED | The soil contains all the water it can absorb |
