When corn stalks are removed from the field and utilized as forage or bedding materials, additional soil nutrients will also be removed. Generally, 16.3 lbs. of N; 5.4 lbs. P205; 18 lbs. K20; and 3 lbs. S per ton of dry matter (D.M.) is removed with the stover.
Calculations for nutrient removal:
1500 lb….
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Since 1 August 2012, we have received approximately 8 inches of rain. Tilers and grave diggers are reporting the top 2 foot of soil is at field capacity or slightly below. But, below this two foot depth the soil is extremely dry.
When the surface soil dries up, I would proceed with fall…
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Generally, I want to see fall, dribble band applications of P&K + micros. However, on low CEC soil, that is less than 8, I would recommend a spring application. With these lower CEC soils, K (potassium), S (sulfur), and micros could be lost due to leaching.
I would dribble band the P&K + micros prior to the lime application. I find it most desirable to wait on .25 inch rain or 3 to 5 day delay minimally between the two applications.
Looking at gross receipts for our grain sales this fall, I see that corn still gives me roughly $45/A higher gross returns per acre than our soybean operation that produced better than 66 Bu/A.
I am seeing a lot of our corn fields which are very green at this time. The bottom leaves of the corn plant are showing the stress of the dry weather. These leaves are quite brown and are dead. However, the tops of the corn plant, generally from the ear up, are green. When…
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Many of our soybean fields received 1.5 to 2.0 inches of rain in early August. These rains added bushels, therefore I am predicting 5 to 8 bushels more soybean to our yield. But if the forecasted rains pass us by, our increased soybean yield opportunities could be finished for our 2012 soybean crop.
…
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I have found several factors which are dramatically influencing crop yields this year:
Corn variety
Planting date
CEC of the soil
P&K soil fertility values
Planting depth
Previous crop
Amount of rainfall received (April thru present) and sub-soil moisture availability
…
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After the corn has tasseled for approximately 7 to 10 days, significant yield indicators are quite obvious. On the individual ear, the girth (rows) around the ear can be counted. Next, the number of ovules pollinated down the length of the ear can be counted. The pollinated ovules will be rectangular shaped, and will…
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Today, 28 June, I saw my first tassel on 107 day corn planted on 24 April 2012. This prolonged dry spell might slow both tassel and silk emergence on corn.
By the 4th of July, I would like to see all herbicide spraying completed on soybeans. By early July most soybeans will have begun…
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