Utilizing ultisols for agriculture requires a) extensive irrigation. b) fertilizer to balance the high alkalinity of the soil. c). adding organic matter to supplement the shallow horizons. d) fertilizer to replace nutrients that leach from the soil.

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these

In the diagram, δgef and δhef are congruent. what is the value of x?

What is likely to happen in the long term if the earth continues to absorb more energy than it emits? a. the earth will discontinue recycling energy. b. organisms will begin to compensate for the change by incorporating more energy. c. the overall temperature of the earth will increase. d. the nutrient cycles will happen more frequently. select the best answer from the choices provided a b c d