FIGURE 9. INFLUENCE OF FERTILIZER TREATMENT ON
SEASONAL PRODUCTION OF PASTURE HERBAGE
This is a comparison of the seasonal productivity of treated and
untreated pastures at Cornell University in 1937. The total
column represents the yield of dry matter per acre per day during
each period of a pasture treated with superphosphate, muriate of
potash, and ground limestone, while the darkly shaded portion at
the bottom of each column represents the yield from the untreated
pasture
FIGURE 10. PASTURE IMPROVEMENT AND EROSION
CONTROL
Right: An untreated pasture plot at Cornell University that shows
thin sward which results In erosion and loss of water by runoff
from the surface.
Left. A plot treated with superphosphate and lime that shows a
development of protective sward of wild white clover. The rapid
absorption of water by this plot resulted from the increased
porosity of the soil brought about by the growth of roots and the
activities of earthworms. The treated plot contained four times
as many earthworms as did the untreated plot
10
