Farmers have experienced good to outstanding soybean yields in 2011. The large soybean yields have created a need for an additional 5 to 10 lbs. P205/A and 15 to 20 lbs. K20/A, thus should be added to your normal 2012 corn fertility program. From the following chart, the need to apply this additional fertility can…
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This past 2011 growing season had significant periods of dry or droughty weather conditions. As a result of this dry weather condition, two items on your soil test may be affected this fall. The first item is the soil or water pH value. Because of added amounts of salts not being leached from the…
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We finished harvesting our soybeans late on 3 Oct 2011. Overall, our yield at the Agronology 10 Research Center in Walcott, IA, was truly outstanding. We harvested our 7th highest individual yielding plot with a yield of 83.95 Bu/A. The 18 highest yielding individual plots make up our critical observations each year. In 2011, our…
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We began harvesting the 2011 corn crop at our Agronology 10 Research Center in Walcott on September 25, 2011. The 105 day corn planted in the borders yielded 180 Bu/A with harvest moisture at 19.8% and test weight was 57.8 lbs/bushel. The 2011 yield in the border is 20 Bu/A less than previous years.
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This year with its many environmental stresses, high temperature and lack of moisture are causing many fields to experience “top leaf die back”. This top leaf die back can be easily confused with European corn bore (ECB) damage or anthracnose top kill. With European corn bore damage, you will find holes (tunnels)…
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In July, there were 18 nights that were warmer than 69º F (nighttime minimum); and the daytime maximum temperature was warmer than 86º F. The potential impact of these temperatures can be analyzed from two viewpoints.
First, the elevated nighttime temperature means less net photosynthate (energy) available daily to increase corn…
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The soybeans which are photoperiod sensitive will have begun flowering. At the time of the summer solstice (21 June), the soybean plant recognizes that winter is coming and begins its reproductive phase of plant growth. The more nodes the soybean plant has at this time of year, the more sites there will be for…
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