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This experiment was installed in Campo Verde County, Mato Grosso State during the agricultural year of 2004/2005 in a soil with high fertility, had 6 treatments: doses of K (0, 130 and 200 kg/ha of K2O) with and without two applications of fungicides (mixture of triazol + estrubilurina).
Main results: there was no effect of K fertilization in soybean resistance to rust in the treatments without fungicide; there was no yield increase due to K fertilization in the treatments with fungicides, as can be seen in the table below:
| Treatments | K2O (kg/ha) | Fungicides | Yield (kg/ha) |
1 | 0 | - | 1,866 |
2 | 0 | + | 4,536 |
3 | 130 | - | 1,872 |
4 | 130 | + | 4,482 |
5 | 200 | - | 1,998 |
6 | 200 | + | 4,488 |
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