Sunday 28 September 2014
Saving the World One Yard at a Time
Abstract
The objective: Fertilizer in runoff increases algae growth, and I want to determine which fertilizer will decrease the amount of algae growth in water. I believe a
fast acting three-ingredient fertilizer will cause the most algae growth, and a time-release fertilizer will cause the least algae growth because a time-release
fertilizer only lets off a small amount of nutrients at a time.
Methods/Materials
Three types of fertilizer were used: 14-14-14 time-release, 12-0-0 fast-release (one-ingredient), 15-30-15 fast-release (three-ingredient). A mixture of pond water
and distilled water with a precise amount of fertilizer was added to twelve 1-pint glass jars. The jars were covered with cheesecloth and set in sunlight for 35 days.
After 35 days the algae was scraped onto separate coffee filters, and weighed while wet with a gram weight scale.
Results
The one-ingredient fertilizer grew the most algae, 1.3 grams. The fast-acting three-ingredient fertilizer grew 1.2 grams. The time-release fertilizer resulted in
the least amount of algae growth, .4 grams.
Conclusions/Discussion
The time-release fertilizer grew the least algae, as I hypothesized. I would recommend this fertilizer for gardening to reduce algae growth, but I would research
in the future how well it helps plants grow. The one-ingredient fertilizer grew the most algae, and the fast acting three-ingredient fertilizer grew less algae, but
only by .1 gram.
This experiment is to determine which fertilizer will grow the least algae in water
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