After 10 to 12 days of below normal temperatures and freezing temperatures at various nights, the temperatures are warming up and crops are growing again.



Cold, dry winds and now warm temps and winds have rapidly dried out the soil surface and corn that hasn't been planted deep enough or planting in firm moisture. On ridge-till and no-till fields that were planted a little wet, there is sidewall compaction in the seed slice and moisture or over head irrigation is needed in a few days to help even corn shoot emergence.



On the clayey or hard spots in the fields that were planted too wet, some seed slices are opening back up from the drying conditions.



Pivots are running on some earlier planted fields that have a firm crust. It is a difficult decision between running water and cooling down the soil and possibly slowing emergence or not running and have the last few thousand plants per acre struggle to emerge.



Pre-emerge herbicides that haven't received at least 0.5 to 0.75 inch moisture will not have very good weed control. If the soil surface is very dry, it will take more moisture to adequately activate the herbicide. Most of the poor performances from pre-emerge herbicides are from not receiving or applying moisture soon enough before weed germination or emergence.



Alfalfa weevil larvae continue to work on the unfrozen tips. Some producers are electing to cut the crop early rather that treat the weevil. This will cut down the alfalfa stand's longevity.



Source: Orvin Bontrager, CCA, CPAg, CropTalk