What percentage more nitrogen would be saved annually by using reduced tillage rather than conventional tillage?
a. 2.7%
b. 63%
c. 50%
d. 37%
Answer: d. 37%
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After a winter storm, bright sunlight returns and the snow and ice on the road melt into liquid water. This is an example of
A) light energy converted to heat energy, changing the state of water. B) movement changing the position of snow and ice. C) matter changing the heat of the atmosphere. D) movement generating heat that changes the position of ice and snow.
The principle of ________ states that an original sedimentary layer extends laterally until it tapers or thins at its edges.
A. superposition B. cross-cutting relationships C. lateral continuity D. actualism E. original horizontality
The forecasts of world population growth made by population modelers Pearl and Gould in 1936 contrasted greatly with that of Meadows and Meadows made in 1972. Since all models are based on specific assumptions, explain the major differences in
assumptions between these two models. Also include the major characteristics of the current UN population growth forecast. What will be an ideal response?
In a large city experiencing urban blight, we would be surprised to find
A) a declining tax base. B) depreciating real estate. C) improving schools. D) increasing crime.