Iowa Corn, Soybeans: P and K Management Following Highly Variable Yields Oct 2, 2019

🕔Oct 2, 2019
Very variable weather this season will result in variable corn and soybean yield within and between fields. Entire fields or portions of fields were planted later than usual or were […]

Iowa Corn: Nutrient Removal When Harvesting Stover Sep 10, 2019

🕔Sep 10, 2019
Increasing demand to use corn plant biomass for producing energy and various products has spurred interest in harvesting corn stover and specific plant components in addition to grain. Harvesting more […]

Iowa Corn: Sampling for the End-of-Season Stalk Nitrate Test Sep 4, 2019

🕔Sep 4, 2019
Sampling corn stalks this fall will likely be later than normal due to the delayed planting in many Iowa cornfields. The overall suggestion is to wait until crop maturity, and […]

Iowa Soybeans: Upper Leaves Showing Potassium Deficiency Aug 26, 2019

🕔Aug 26, 2019
Since early August, soybean in several fields began showing typical potassium (K) deficiency symptoms on leaves located in the middle to upper canopy. This is not surprising in fields or […]

Iowa Corn, Soybeans: Tissue Testing Requires Cautious Use, Interpretation Jun 21, 2019

🕔Jun 21, 2019
In-season plant tissue testing can be useful in diagnosing nutrient deficiencies in field crops, but it must be used with caution. Extra care is needed this year given the unusual […]

Iowa Corn: Late-Spring Soil Nitrate Test Use in 2019 May 23, 2019

🕔May 23, 2019
Nitrogen (N) fertilization for this year’s Iowa corn crop has been complicated by frequent and sometimes excessive rainfall from late last fall through this spring. Many farmers who normally apply […]

Iowa: Applying Flood Adulterated Grain as Crop Nutrients Apr 3, 2019

🕔Apr 3, 2019
Flooding has been extensive in several areas of Iowa this spring. In some cases, stored grain has been affected by flood waters. Land application of flood adulterated grain as a […]

Iowa Soybeans: Potassium Deficiency Symptoms Aug 22, 2018

🕔Aug 22, 2018
Since early August, farmers and consultants have been reporting what they believed were potassium (K) deficiency symptoms in soybean leaves located in the middle or upper canopy. This is not […]

Iowa Corn: Nitrogen Considerations with Dry Conditions in 2017 Aug 31, 2017

🕔Aug 31, 2017
The dry conditions in some areas of Iowa in 2017 have raised several soil fertility questions. In some cases, there has been relatively normal crop production and no need for […]

Iowa Corn, Soybeans: Managing Phosphorus, Potassium, and pH Following Drought Aug 23, 2017

🕔Aug 23, 2017
Dry conditions this summer in some parts of Iowa will result in low and variable crop yield. Low or variable crop growth and yield significantly affect phosphorus (P) and potassium […]

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