One can easily understand how air pollution could affect visibility throughout Great Smoky Mountains National Park.
What’s not as easy to see, but is just as devastating, is how the concentrations of nitrogen and sulfur in the air are impacting water chemistry, aquatic life and even vegetation.
Summarize how the abiotic factors of biomes affect the ability of organisms to grow, survive, and carry out photosynthesis, then learn more about how researchers in North Carolina are studying one abiotic factor, soil, and how the microorganisms it contains help contribute to the health of plants.
May 14, 2015
What’s in dirt anyway?
After sinking the shovel or trowel into the ground to plant something, you end up looking at the dirt that is pulled up and asking yourself, “Just what is in dirt that helps plants to grow?”
We’ve all asked the question at some point. So, to keep things really simple, the answer is that there is a lot of 'stuff' in dirt — including rocks, sand, clay and organic matter. The United States Environmental Protection Agency says the average soil sample is 45% minerals, 25% water, 25% air, and 5% organic matter.
At first glance, it would be easy to say compost is compost. Whether the compost is being shoveled from a bag and raked into a garden or dumped by truck and tilled into a farm, the dark, rich soil looks like dark, rich soil. After all, when you walk through the composting company Brooks Contractor, there are mounds of what looks like black dirt everywhere.