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April 03, 2018 Soil tests indicate large amounts of exchangeable calcium in the soil, but what’s important is how much soluble calcium is present. You can ask to have a water extraction done to measure soluble calcium in the soil solution. If you have both chemical and water extracts done, you will notice that soluble calcium is just a fraction of exchangeable calcium—that is because of the calcium and its interaction in the soil. Crop nutrients... |
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April 02, 2018 Calcium is often an overlooked nutrient in crop production because soil tests report large amounts of this extractable cation. This is the first in a series of three articles exploring calcium in the soil and its need in soybeans. K. K. Gedroiz, scientist with the Forestry Institute in Leningrad, stated in the 1931 Soil Science Journal, “After the practically complete replacement from the soil of all exchangeable calcium, the... |
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April 01, 2018 Over the past few years, the Illinois Soybean Association has been working with the Iowa On-Farm Network (OFN) to evaluate promising production practices. The two most common concepts tested were population and row spacing, which are easy to implement in an on-farm scenario. One of the requirements for participating is collecting as-planted and yield maps. Along the way data is collected on plant stand after emergence and an aerial image of... |