1.   Across the road, a few intrepid fairgoers had gathered at the Greene County fairgrounds to watch cars race on a dirt-track oval of supremely fertile loam.

2.   If grown in fertile loam, the potatoes may develop skin lesions similar to the scab disease that afflicts white potatoes.

3.   In each case, however, the spy thriller was rooted in the fertile loam of widespread cultural anxieties.

4.   When those roots are replaced, the old ones decay and add organic matter to the soil, creating a fertile loam.