Figure 2. Large field-of-view XFM ion maps of Fe distribution in two sterilized control wood blocks placed directly on top of the soil for 8 weeks in a soil block test bottle.

During the 8 weeks the blocks inadvertently rolled around on top of the soil and the areas of high Fe intensity are likely small pieces of soil. However, no general diffusion of Fe into the wood is observed like that observed in wood blocks exposed to Serpula lacrymans in Fig. 1k.