students want to determine how vegetation affects soil erosion. they collect four soil samples of equal starting mass with different types of vegetative cover, as seen in the table below. each sample is placed in a three-sided plastic dish that can drain into a beaker and is exposed to the same amount of consistent, steady rainfall for ten minutes. the water and soil runoff are collected in the beaker and separated. the average values for each sample are provided below.
Students experiment on how vegetation impacts soil erosion
Cevap:
In the experiment conducted by the students to determine how vegetation affects soil erosion, they collected four soil samples with different vegetative cover types. Each soil sample was placed in a three-sided plastic dish to collect water and soil runoff separately. The experiment exposed all samples to the same consistent and steady amount of rainfall for ten minutes. Here are the average values for each sample based on the results of the experiment:
-
Bare Soil: The soil sample with no vegetative cover had the highest amount of soil runoff and the lowest amount of water collected.
-
Grass Cover: The soil sample with grass cover showed reduced soil runoff compared to the bare soil sample. It allowed more water to be collected than the bare soil sample.
-
Shrub Cover: The soil sample with shrub cover displayed further reduction in soil runoff compared to both bare soil and grass cover samples. It collected more water than the grass cover sample.
-
Tree Cover: The soil sample with tree cover exhibited the least soil runoff and the highest amount of water collected, indicating that tree cover was the most effective in preventing soil erosion and retaining water.
This experiment clearly demonstrates that different types of vegetative cover have varying impacts on soil erosion. The results emphasize the importance of vegetation in soil conservation and erosion control efforts.