A long used source of organic P (especially by vegetable and rose growers):

A K source not well suited for application to tobacco:

Issues with its use as it is an ingredient in meth manufacturing:

‘Typical’ CEC in a field soil (a clay loam), in meq per 100 g?

When a soil is saturated, which of these is true?

Rock phosphate is a suitable source of P during that cropping year in which it was applied:

3. Retrograde motion is something that was observed to happen to the planets motion through the sky.      a) What is retrograde motion of the planets?      b) How did Ptolemy try to explain retrograde motion?      c) How does Copernicus’s model explain retrograde motion?

Explain why a scientific theory can never be proven. If that is true, are scientific theories no better than guesses?

23. In the class demonstration, when viewed through the diffraction gratings, the tubes of gas excited by a high voltage source emitted

4. List two reasons that a bigger telescope is better than a smaller telescope.