FIGURE 4. RESPONSE OF LANGFORD, WALTON, AND
LACKAWANNA SILT LOAMS TO FERTILIZATION
The soils used in this experiment, reading from top of page to
bottom, are Langford silt loam testing pH 5.5, Walton silt loam
testing pH 5.2, and Lackawanna silt loam testing pH 4.8. Each box
was seeded with a mixture of grasses and wild white clover. The
treatments from left to right were:-1, untreated; 2, complete
treatment with nitrogen, phosphorus, potash, and lime; 3,
complete except no potash; 4, complete except no phosphorus, 5,
complete except no nitrogen; 6, complete except no lime; 7,
phosphorus only
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