I couldn't find answer for these questions, but i got the rest of the answers,?

Question

1.Is there a relationship between the colour of the soil and the amount of organic matter? If so, describe this relationship.

2.What rock type might produce soils with a neutral or high pH? Hint: What stone is used to neutralize an acidified lake?

3.Soil texture is determined by the size of the soil particles. How might soil texture affect the growth of plants? Which soil texture would produce the greatest plant growth? Explain your answer.

4.Explain how the organic content of a soil might affect plant growth.

From the soil lab, Investigating Soil

Science Power 10

i was gone for the half of the lab, and it's due tommorrow, need imergency help,

Answer 1

1. More organic matter usually makes soil darker in color.
2. limestone
3. A mixed soil texture would be best for most plants. Too small (like clay) makes soil too hard for roots to grow through and makes soil impervious to water. Too large (like sand or gravel) makes soil drain too quickly and not hold water.
4. Organic matter in the soil does several good things for plants: It holds water in the soil, keeping water available for plants. It loosens the soil, letting air and roots travel through the soil more freely. It decomposes in the soil and adds nutrients.

Answer 2

1) interaction or diffusion or something like that.
2) Talcum
3) Varied sizes would, I built a berm with talc and it collapsed fast, I built another with clay, then one with sand, the third one was a mixture of all three, it lasted longest.
That is also 4