You can check the temperature of the mow by pacing a thermometer inside a pipe or by using a metal rod and shoving it into the mow and leaving it in for about 15 minutes and than checking the temperature or feeling the rod with your hand. Three quarter of the corn crop is in tassel. Significant differences in tasselling date within a field indicate a wide spread in maturity, and will translate into variable grain moistures at harvest. In spite of concerns over nitrogen loss earlier in the season, most fields have very good color. Leaf rust is present in most corn fields this year.
Soybeans are in full bloom.
Now is a good time to check your soybean crop for manganese deficiency. With manganese deficiency, the upper leaves of soybean plants range in color from pale green to almost white while veins in the leaves remain green. The sticker can cause some burn on the foliage, but the crop will green up within 2-3 days. Most of the spring cereals are turning color. It's now time to plan your pre-harvest weed control treatment in barley and wheat.