Self-study
Many homeowners regularly add commercial fertilizers to their lawns and gardens to maintain a healthy balance of nutrients in soil. ███ ██████ █████████ ██████████ ███████████ ███████ ████ ████████████████████████ █████████ ███████████ ███ ██████████ ██ ██████ ███████ ██ ███ ████ █████ ████ ███ █████ ████████ ███ ████████ ██ █████ ██████████████ ███ ████ █████ ███████ ██ ██████████████ ████ ██ █████ █████ ███ ███████ █████ ███ ████████ ████ █████ █████████ ███ █████ ██ ██████ ████ ███████ ██ █████ ███ ██████ ██ ███ █████
Summary
Many homeowners add commercial fertilizer to their lawns to keep them healthy.
Lawn soil needs macronutrients and micronutrients to remain healthy long-term.
Widely available commercial fertilizers only contain macronutrients.
Raking up grass clippings instead of letting them decay in the soil depletes soil’s micronutrients.
Very Strongly Supported Conclusions
If homeowners rake their grass clippings instead of letting them decay, then widely available commercial fertilizer alone is not enough for their soil to remain healthy long-term.
Homeowners who use widely available commercial fertilizer and also rake their grass clippings need to use another source of micronutrients in order for their soil to remain healthy long-term.
24.
Which one of the following ███ ██ ████████ ████████ ████ ███ ██████████ ██████
a
There is no ██████ ██████████ ████ ████████ ████ ███ ██████████████ ███ ██████████████ █████████ ███ ███████████ ██████ █████████ ███████
Unsupported. “Widely available commercial fertilizers” do not provide both the macronutrients and micronutrients necessary for soil’s long-term health. But this doesn’t mean that no fertilizer provides all necessary nutrients.
b
The macronutrients nitrogen, ███████████ ███ █████████ ███ █████████ ██ ██████████ ████ ██ ██████████ ████████████
Unsupported. These macronutrients are available to homeowners in commercial fertilizers, but they might be available in other fertilizers or methods too.
c
Widely available commercial ███████████ ███ ███ █████ ██████████ ██ ████████ █ ███████ ███████ ██ █████████ ██ ████ ███ █████ █████ █████ █████████ ███ ███ ███████ ██ █████ ███ ██████ ██ ███ █████
Very strongly supported. Widely available commercial fertilizers only provide macronutrients, and soil needs both macro and micronutrients. Since raking grass clippings depletes micronutrients, commercial fertilizers alone are not enough to keep the soil healthy in these lawns.
d
For soil to ██████ ███████ ██ ███ ████ █████ ██ ████████ ███ ███████ ████████ ██ ████ ██████████ ███████████ ███ █ ██████ ██ ██████████████ ████ ██ █████ █████████ ████ ███ ███████ ██ █████ ███ ██████ ██ ███ █████
Unsupported. Commercial fertilizers provide macronutrients and decaying grass clippings provide micronutrients. But these might not be the only sources of nutrients. There could be other methods, like using compost or manure, that also allow soil to remain healthy long-term.
e
Homeowners who rake ██ █████ █████ █████████ ███ ██████ ██ ████████ ███ █████████ ██████ ██ ███ ████ ██ █████ █████ ███ ████████
Unsupported. Raking up grass clippings depletes soil’s micronutrients, but there might be other sources of micronutrients that homeowners can use to maintain the long-term health of their soil.