Biodiesel critics and advocates both noted that there was no proposal in the president's budget to extend the biodiesel blenders' credit. This has sparked a discussion in Washington about where the issue stands in Congress.It is an annual process in Washington to consider a package of tax extenders for expiring tax provisions, but Congress is in no hurry this year for the exercise. It let the tax provisions, a myriad of them, lapse at the end of 2013 and hasn't taken up any legislation to reinstate them. One particular tax provision is of interest to the ag sector, the biodiesel tax credit. The biodiesel blenders' tax credit was initiated in 2005, and it has expired and been reinstated three times since then. It was restored in early 2013 a...