Why is the earth's magnetic field important for us?

It protects us from the magnetic/electrical radiation that comes from the sun. High radiation periods coincide with solar storms.

Answerit increases at a steady rate;

If you're looking for an even spread of clay, silt and sand, add a considerable amount of sand and some clay until the 3 even out". soil texture triangle. silty clay loam soil is approximately 20 percent or less sand, 25 to 40 percent clay, and 40 to 70 percent silt.