<span>Alright.. this is what I have in mind... then you can judge if I'm totally crazy:
As in any other experiment we wish to only hold 1 variable, while other thinkable variables are held constant.
In addtion to that we need to ref. soil and call that 0.
Now some theory: We know from medicals they can have synergetic effect if mixed. Same can go for nutrients, we therefor test each soil mixed and alone and see the effect.
We call the nutrients A, B and C, (continue with more if you like)
Now this is our setups:
0, A, B, C, AB, AC, BC, ABC.
In this way we can make compare to a ref soil (0) and also check for synergetic effects... this is a bit considered a multivariable experiment, but we also have A, B and C as ref. against the mixed soils.</span>
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d:
Answer:
Porosity is a characteristic of rocks that affects the rate of weathering.
Explanation:
The rocks of all types are weathering under the influence of natural factors/elements. The water, temperature, climate, humidity, precipitation, winds, ice, all have their say when it comes to weathering and each of them is dominant in some areas. It is not just them that affect the rate of erosion though, but also the type of rock and its characteristics.
One characteristic of the rocks that is very important for the rate of erosion is the porosity. The porosity is a characteristic that shows us how easy or hard the rocks let water or other liquids through them. If the coefficient is high, then the rate of erosion will be very high, but if the coefficient is low, then the rate of erosion will be also very low.
Availability of employment: Due to the small size of the population and abundance of resources, employment opportunities will readily be available. 3. Low pressure on social amenities: Owing to low population, there is also low pressure on social amenities in the area.
