Publishing academic research in more than one field
Interdisciplinary research is both an advantage and a disadvantage.  

Interdisciplinary research is advantageous because the interaction between fields is often extremely productive in creating new knowledge and breakthroughs.  Lots of extremely important things start out as interdisciplinary research, and it's where entire new fields tend to emerge.  In my opinion, most of the most exciting research you'll encounter is interdisciplinary in nature.

The disadvantage is that until the new area starts to be recognized as important, interdisciplinary work isn't well "claimed" by any discipline.  This means it's harder to get published, harder to get funded, and generally harder to get respect from colleagues working in "core" areas.  There are often very few people who fully understand the content of an interdisciplinary project, and the importance of an interaction is often only recognized in retrospect.

This tension is, I believe, the reason that you often see articles calling for more interdisciplinary research.  Many people recognize its importance, but if it was well-supported by existing community dynamics, they wouldn't need to write these articles.