An experiment is set up to determine if wheat grows better when it is planted by itself or together with clover. the setup involves 3 pans of each treatment. set-up a, b and c contain wheat alone. set-ups d, e and f contain clover and wheat planted together, in rows alternating one seed of each type. one hundred seeds are planted in each pan. all treatments contain the same type of soil, are planted in the same size of pan, are exposed to the same amount of sunlight, and are maintained at the same temperature throughout the course of the experiment. use passage 1-1. constants in this experiment are:

The constants in this experiment are:

Number of planted seeds

Soil type

Pan size

Temperature

Amount of sunlight

Explanation:

Both treatments the only variable is the absence/presence of clover, so then the other parameters remain as constants due to these do not change their size or amount for both treatments.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion