| They follow a slash-and-burn method of clearing the soil and use the hoe for cultivation. |
| Before 1502 the native populations practiced slash-and-burn agriculture, growing a variety of root crops. |
| Furthermore, the slash-and-burn method of land clearance is better for soil properties, both physical and chemical, than mechanical clearance. |
| And the population explosion has triggered massive new construction projects, from roads to slash-and-burn agriculture and urban development. |
| Despite the difficult terrain, slash-and-burn agriculture is a major crop-producing activity. |
| The environment is threatened by slash-and-burn agriculture and the cutting of forests. |
