What do you call the lines on a topographic map that indicate the elevation of the land forms?
topographic lines
Think about this logically.
Excessive Irrigation would be flooding the land. This would wash away soil and nutrients for the plants.
Crop Rotation is rotating crops to<span> preserve the soil. </span>
Soil Exhaustion is when you exhaust the soil of its nutrients, making it basically barren until the nutrients replenish.
Leaching also takes away nutrients from the soil. So by not doing things other than mentioned above will make his soil productive
It's either Coal or Petroleum. I'm leaning more towards petroleum.
