Sensor-based Fertigation Management Research Boosts Efficiency, Profitability

Mar 20, 2023

For the past four years, University of Nebraska–Lincoln researchers have studied the prospects for using sensor-based fertigation management, or SBFM, to increase the efficiency and profitability of nitrogen use. The latest results are now in from multiple Nebraska sites, and they show that the technology enables major gains in both regards.

“This method allows the sensors and imagery to detect what that crop needs, so that you’re not overapplying nitrogen,” said Taylor Cross, a graduate research assistant who oversaw the project last year. “You’ll really see a lot of nitrogen savings with this method.”

For the project, drones provided weekly updates on crop-condition data by using multispectral imagery that showed nitrogen levels. Analysis of the data via N-Time software then directed specific applications of liquid fertilizer by irrigation equipment in a set of eastern Nebraska cornfields.

At all three on-farm test sites in 2022, the approach produced greater efficiency in nitrogen use than did conventional management, with efficiency measured in pounds of nitrogen per bushel of grain. The two SBFM-recommended approaches produced about 44 pounds more grain per pound of nitrogen than did the growers’ traditional method. The two SBFM-recommended methods also showed the potential for boosting profitability. The increases ranged from $28 per acre to just over $40 per acre, on average, across the three sites.

Source : unl.edu

Video: Dicamba Returns for Georgia Farmers: What the New EPA Ruling Means for Cotton Growers

After being unavailable in 2024 due to registration issues, dicamba products are returning for Georgia farmers this growing season — but under strict new conditions.

In this report from Tifton, Extension Weed Specialist Stanley Culpepper explains the updated EPA ruling, including new application limits, mandatory training requirements, and the need for a restricted use pesticide license. Among the key changes: a cap of two ½-pound applications per year and the required use of an approved volatility reduction agent with every application.

For Georgia cotton producers, the ruling is significant. According to Taylor Sills with the Georgia Cotton Commission, the vast majority of cotton planted in the state carries the dicamba-tolerant trait — meaning farmers had been paying for technology they couldn’t use.

While environmental groups have expressed concerns over spray drift, Georgia growers have reduced off-target pesticide movement by more than 91% over the past decade. Still, this two-year registration period will come with increased scrutiny, making stewardship and compliance more important than ever.