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Illinois Fertilizer Conference Proceedings
January 25-27, 1999

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Table 7. Yield of sudangrass as affected by phosphate source and pH
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Phosphate
source
pH 4.6
pH 5.6
pH 6.6
 

----------------yield (/pot)----------------
None
0.13
0.14
0.14
Comm. rock phosphate
1.51
0.72
0.28
Monocalcium phosphate*
3.70
2.90
5.60

 

* The monocalcium phosphate was applied at 1/4 the rate of total phosphorus supplied as the rock phosphate. Adapted from Joos and Black (1950).

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