Wednesday, September 21, 2011
The early season frost in September caught many of us off guard. Damage to crops varied statewide but the fundamental question is, as a farmer, what should I do regarding a potential loss regarding my federal crop insurance? There are some basic procedures that one needs to follow in the event of a crop loss regardless of cause. This article outlines some of those procedures.
Friday, September 16, 2011
Seth Naeve - Extension Soybean Agronomist
Few resources are available to producers and agricultural professionals relative to yield losses from late- season frost injury to soybean plants. A study investigating the risks and benefits of long-season soybean varieties was established in 2008. This work was carried out by the Naeve Soybean Production Project, and was funded by the Minnesota Soybean Research & Promotion Council. While we don't have all of the answers that folks search for after a late-season frost, a small piece of this research effort is described below.
Thursday, September 15, 2011
By Seth Naeve and Dave Nicolai University of Minnesota Extension
A hard frost occurred early Thursday morning (Sept 15th) across much of central and southern Minnesota. The complete effects of this frost or freeze event may not be known for some time. However, most soybean and corn fields have not reached physiological maturity. Yield and quality in these fields were likely affected.
Beyond the minimum temperature and the duration of the freezing temperatures, many cultural and environmental factors will affect the level of damage. Late planting, long season varieties, poor fertility or drainage, and cool temperatures may exacerbate the effects of this early frost/freeze event.
In most crop species, a hard killing frost after physiological maturity has little effect on yields. Physiological maturity is defined as the point at which maximum dry matter accumulation has occurred in the seed. But crops are not ready for harvest at physiological maturity, since dry- down usually takes a longer period of time. Soybeans are usually harvested at moisture contents of 14 percent or less.
Jeff Coulter, Extension Corn Agronomist
September 15, 2011
September 15, 2011
Figure 1. Minimum air temperatures on Sept.
15, 2011. From Minnesota Climatology Working Group