What hypothesis were the researchers testing in this study? Sugar beet seedlings have a lower rate of fungal infection in disease-suppressive soils.

The ability of soils to suppress diseases are due to microorganisms in the soil.

Explanation:

In the hypothesis above, the soil treatment was put into consideration, i. e the properties in the soil that aids it in suppressing diseases. The percentage of sugar beet seedings that had fungal infection was also considered.