Answer to Question 1Uncomposted organic material is very acidic, and the addition of organic mulches,
animal waste (especially uncomposted manure), or some natural fertilizers would
tend to decrease soil pH. The effects of the addition of acidic organic materials on
soil pH are highly variable due to the wide variety of soil types under cultivation. If
you live in an area where the soils are derived from weathered limestone, the
addition of organic material or acidic chemicals, such as some fertilizers, would not
reduce the soil pH as much as in an area with an acidic soil
Answer to Question 2The development of the microscope has allowed scientists to investigate an entire
world of extremely small, but important, organisms. Without the microscope,
physicians would not have been able to identify the organisms that cause many of the
world's infectious diseases or understand the way that the human body is put
together and functions. We would not have the current understanding of the structure
and functioning of plants, fungi, or microbes without the microscope.
Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere
Thorndike’s Puzzle Box and the Law of Effect (2 of 2)
The Flynn Effect
Effect of cooperative substrate binding on enzyme kinetics
Effect of an Exogenous Shift in Income
Cocaine’s Effect on the Brain