Soil Crossword

1. also known as a grade control, sill, or weir,
4. Almost any available material can be used to build barriers along the contours.
5. planting gullies with soil-retaining plants,
6. a reduced tillage system that leaves at least one third of the soil surface covered with crop residue.
7. Whenever possible all land should be ploughed along the contour line
8. Each time the soil is dug or ploughed, it is exposed to erosion.
9. is any method of soil cultivation that leaves the previous year's crop residue on fields

2. buffer strips of grass, shrubbery, trees, and other vegetation
3. The period at the beginning of the rainy season soil is prepared forplanting,
10. are a type of conservation buffer; they downhill grassed channels,