Question 1
Water runoff is a major factor in soil erosion, what is a common land use practice on slopes to minimize soil erosion?
◦ adding a rock mulch layer to slow water runoff
◦ terracing slopes to stop downslope runoff and rill formation
◦ planting row crops with rows running downhill, to minimize channelization of flow
◦ planting trees
Question 2
After the drought of the 1930's farmers in the Great Plains were encouraged to plant rows of trees across fields to decrease soil erosion. How would this reduce soil erosion?
◦ The trees had no effect; they were just used to improve the land appearance after the great depression.
◦ Tree roots would retard runoff and prevent erosion.
◦ The trees helped shade the ground, retaining moisture.
◦ The trees can serve as windbreaks to slow wind erosion.
Examples of plant movements.
Rainbow plant (Byblis gigantea)
Plant
Plant
Great English Migration, 1630–1650
Mitosis (A comparison of plant vs. animal cells)