Which of the following might best help grasses in a lawn that have been growing in a soil that has a high percentage of clay?
A) Adding fertilizer in the spring and fall
B) Adding lime in the spring to neutralize the pH of the soil
C) Aerating the lawn by removing small plugs of soil
D) Watering the lawn about an inch of water every other day
C
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The famous Aswan High Dam is located in which nation?
A) Iraq B) Egypt C) Iran D) Lebanon E) Turkey
The Southern rural region that is one of the materially poorest in the United States is
A. the Florida Panhandle B. the Carolina Piedmont C. the Mississippi Delta D. southern Georgia
Ice nuclei:
A) are particularly abundant in the lower levels of the troposphere. B) rarely have six sides. C) have a better chance of forming ice at temperatures below -10 degrees Celsius. D) begin to serve their function once the temperature falls to 0 degrees Celsius.
The upper part of a thunderstorm cloud is normally __________ charged, and the middle and
lower parts are __________ charged. a. negatively, negatively b. negatively, positively c. positively, positively d. positively, negatively