The incorporation of large amount of wheat straw is very unlikely to bring about a deficiency of K in the following crop. Explain at least two reasons why this is so. Compare the organic P levels in...

The incorporation of large amount of wheat straw is very unlikely to bring about a deficiency of K in the following crop. Explain at least two reasons why this is so.

Compare the organic P levels in the upper horizons of a forested soil with those of a nearby soil that has been cultivated for 25 years. Explain the difference.