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Does Salt Inhibit Grass Growth? Essay

1025 words - 5 pages

Does Salt Inhibit Grass Growth?
by

Debra K. Griffiths
BIO

Abstracts

The Scientific Method includes making an observation then asking what would make an event take place in a certain environments or controls. Then a hypothesis (educated guess) is made and a prediction to back the hypothesis. At that point the experiment is taking place and the results come in. Once the results are in, there is a conclusion. Did the hypothesis come out correct or did it fail? Does it require more observation and tests or is it a definite fail? Does salt inhibit grass growth requires information gathering and a hypothesis and the pattern of The Experimental Process.

Does ...view middle of the document...

As it flows it ebbs off a foot off the driveway. This would explain the inability for grass to grow, since it is salt-affected grass. The 3” from the driveway, soil is saturated with salt in the soil, making osmosis impossible for any growth at that distance. Further on, at a foot, there is less saturation in the soil, so there is growth but very slow growth probably due to water stress.

Prediction:
If salt from the driveway runoff is causing the grass not to grow at all at 3” and slower at a foot, then putting salt from the edge of the driveway and lessening the amount of it up to a foot, the grass will not grow at 3” and will be slower to grow at a foot. If the salt is affecting the growth of the grass, then salt-absorbed grass will not die out and will grow (Swift and Kiosk).

Controlled Experimental Method:
First experiment was to use salt absorbing grass, ryegrass and wheat grass and allow the salt to run off. The soil is tested at 3“ and again at 12” for the level of salt in the soil. The salt level is high at 3” and less at 12” but the grass grew and was not stunted due to it being salt absorbed grass.
The second experiment was to use salt-affected grass in the same area. The salt ran off to 3” and ebbed out at a foot. At 3” there was no growth, at a foot, growth was slower.
The third experiment was to put a barrier on the soil at 3”, not allowing water runoff from the driveway to go beyond the 3”. Then another barrier after that 3” barrier at a foot from the driveway.

Results:
Experiment 1: When salt-absorbed grass was used, the salt level at 3” though high did not effect the grass from growing. At a foot, there was less salt in the soil yet, the growth was not slower or stunted. This tells us the grass that was not growing was salt-affected and was being inhibited by the salt running off...

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