I just read an article from the latest edition of California Agriculture: Nitrogen fertilizer use in California: Assessing the data, trends and a way forward. The article compiles data about inorganic N fertilizer use by major crops in California and compares data from the 1970s to the 2000s.
The University of California is in the process of hiring a Cooperative Extension Rice Specialist. Two applicants have been selected as final candidates, and as part of the interview process, they will be giving an Extension Seminar.
