soil conservation

harmful practices

grass destroying

log forest

contruction

framing

soil cant be held in place

erode

carried away by water

carried away by wind

soil downgrade

soil contamation

protect soil

adding organic material

hold more water

increase in soil fertility

careful farmer

keep soil quality

planted in each row of feild

replenish soil nutraints

preserve soil

building trenches on steeper slops

help hold together