Most soil scientists agree with the unvalidated concept that soil carbon levels will likely decline in step with temperature increases. Higher biological activity will result in more decomposition of organic matter. One certainly sees a similar relationship between soil carbon and temperature when comparing the effect of elevation, aspect and latitude. That we have yet to validate it is telling.

In mycorrhizal associations, the fungal partner assists its plant host with nitrogen and phosphorus uptake while obtaining photosynthetically fixed carbon. Recent studies in mycorrhiza have highlighted the potential for direct transfer of ammonia from fungal to plant cells. This presents a new perspective on nitrogen transfer at the mycorrhizal interface, which is discussed here in light of recent progress made in characterizing a large array of membrane proteins that could fulfil the function of transporting ammonia.

Charcoal holds a key to improved soil vitality. Reported effects are impressive. I want to see this for myself. Commercial charcoal being unsuitable, this means making my own. Which naturally led me to experimenting with home-scale inverted downdraft gasification.

Actinobacteria are a hyphae-producing soil bacteria that, in appearance and behavior, have more in common with soil fungi. The spores of Actinobacteria have a distinctive, earthy smell we often associate with rainfall. The smell comes from a compound, geosmin, which translates to "earth smell". The human nose is exquisitely sensitive to geosmin, able to detect it at concentrations down to 10 parts per trillion.

The environmental persistence of these compounds, used as an antimicrobial agent in hand soap, is remarkable. More than a million pounds of these chemicals flow into the nation's sewers every year. Between 50 and 75% of this ends up land applied as sludge. Triclocarban has been determined by the FDA as having no verifiable benefit. Despite a lack of evidence that these compounds accomplish anything beneficial, usage rate is very high among consumers. Among the households I have surveyed, it approaches saturation. It makes little sense to land apply recalcitrant compounds that needlessly get rid of soil microbes. Fomenting the growth of resistant strains of disease organisms is only one concern. Soil functional capacity is largely mediated by living processes. It is the height of folly to jeopardize those functions for a useless consumer item.

Edaphology is the study of soil (edaphic) effects. Until about 25 years ago, it was mostly synonymous with agricultural soil science as distinguished from pedology, the study of soil in its natural setting. Edaphology now encompasses the new field of environmental soil science, with its more formal emphasis on interdependent living processes in soil.

"Teaming with Microbes", by Jeff Lowenfels and Wayne Lewis. Foreword by Elaine Ingham. Strong soil science orientation. Well organized. Extensive index. Valuable guide to labs and suppliers. Looking forward to actually reading it.

Thoughts prompted by a message from SSSA President, Rattan Lal: "Making Soil Science Education Relevant to Societal Needs". Compare and contrast to material posted to NSCSS Education Project.