What’s New with K Fertilizer Use?

Apr 10, 2018

By Charles Wortmann

Available research-based information continues to verify that the soil test potassium (K) level of 125 ppm as a critical level for K application is adequately high for agronomic crops of Nebraska. The probability of profitable response to K application is very low if soil test K is above 125 ppm.

In three studies of corn response to applied K involving over 50 trials, there was a 2-4 bu/ac average decrease in yield during the year of application. The decrease was not greater with application of 86 compared with 43 lb/ac of K2O. The cause of the decrease has not been well determined. There is no evidence for such a decrease with other crops or of the reduction effect for corn persisting beyond the year of application although this has not been well-studied. These results suggest that

fertilizer K should not be applied if not needed;
infrequent higher rate applications are better than annual lower rate applications; and
K may be better applied to another crop in the rotation rather than corn.

The UNL K recommendations are available in the Nebraska Extension publication, Nutrient Management for Agronomic Crops of Nebraska (EC155). We realize that some advisors recommend K rates in excess of UNL recommendations, but available research-based information indicates that these higher rates reduce profit potential.

Source: unl.edu

Video: What Is Remote Sensing In Precision Agriculture? - The World of Agriculture

What Is Remote Sensing In Precision Agriculture? In this informative video, we will dive into the fascinating world of remote sensing and its role in precision agriculture. Remote sensing technology allows farmers to gather critical information about their fields without the need for physical presence. By utilizing satellites, drones, and aircraft equipped with advanced sensors, farmers can monitor various aspects of their crops, from temperature and moisture levels to overall plant health.

We will explore how the data collected through remote sensing can empower farmers to make strategic decisions for their crops. With the ability to identify specific areas that require more water or nutrients, farmers can optimize resource usage, leading to healthier plants and improved yields.

Moreover, remote sensing plays a vital role in tracking crop growth over time. By comparing images taken at different growth stages, farmers can evaluate their crops’ development and adjust their management practices accordingly.