Dr. Calvin Trostle, Extension Agronomy, TAMU Soil & Crop Sciences, Lubbock, (806) 723-8432, ctrostle@ag.tamu.edu   This past week I received digital pictures and sorghum head samples from two different fields where grain sorghum fill was incomplete.  This highlights the most difficult field situation I encounter in grain sorghum for 20+ years.  What is the cause?  What is particularly frustrating is production conditions often appear to be good.  Often it is difficult to pinpoint any reasonable cause.  Weather often is not a known factor, e.g. there were no extremes… Read More →