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.
Evolutionary relationships of the modern plant phyla.
Types of plant stimuli.
Jupiter - Great Red Spot
Plant
Plant
Plant