1,660 pounds of phosphorus

34, 100 pounds of potassium

8,500 pounds of magnesium

13,100 pounds of calcium

"Rich in everything but nitrogen," Percy continued, "richer than our
common prairies in phosphorus and calcium, and nearly as rich in
potassium and magnesium; but very, very poor in nitrogen. Legume
plants ought to grow well on that land, because the minerals are
present in abundance, and, while lack of nitrogen in the soil will
limit the yield of all grains and grasses, there is no nitrogen
limit for the legume plants if infected with the proper
nitrogen-fixing bacteria, provided, of course, that the soil is not
acid. You will remember, however, that even this sloping land is
more or less acid, although here and there we found pieces of
undecomposed limestone. With a liberal use of ground limestone, any
legumes suited to this soil and climate ought to grow luxuriantly on
those slopes."

"That reminds me that we are greatly troubled with Japan clover on
those slopes," said Mr. West. "Of course it makes good pasture for a
few months, but it doesn't come so early in the spring as blue grass
and it is killed with the first heavy frost in the fall. We like
blue grass much better for that reason, but when we seed down for
meadow and pasture, the Japan clover always crowds out the timothy
and blue grass on those slopes."