OSU NPK

08/17/2026

08/17/2026

The past weekly fertilizer report has been based on the USDA report. But it is an every other week report. So, to keep this moving on a weekly basis, I am adding in a local report. It is that though just a report on what a local Co-op has as it's report price. Chat did not record previous prices, but its now in the request.

08/14/2026

Its not enough that it is crazy hot, we are getting reports of Fall army worms. Although not sure what they are comping on. Dr. Faris has more on the topic in this blog.

Ashleigh M. Faris, State Specialist for Cropping Systems Entomology As Oklahoma summer crops are winding down, we are seeing an increase in fall armyworm reports. Fall armyworms are posing a signif…

08/14/2026

The Fertilizer Market post have brought a lot of new followers to OSUNPK, Thank you. Thought it would be a good to reintroduce myself. I am a State Extension Specialist for OkState and handle Precision Ag & soil fertility on call crops (corn, soy, wheat, cotton, sorghum, canola, ect) and forages. This page is where I share updates, meetings, and new Blogs. While the OSUNPK blog is a host for IPM and cropping system updates, but its primary point is a way for me to get my research out rapidly. We share data here before factsheets and papers. Like the latest on Cheap N is not always the Best N. https://osunpk.com/2026/08/13/cheap-nitrogen-is-not-always-the-best-nitrogen-timing-matters/

For work stuff you can check out my OSU Expert page. https://experts.okstate.edu/b.arnall/about

08/13/2026

The nitrogen source price gap is narrowing but there is still a $.3 difference between NH3 and Urea. This blog walks through the data on grain-only wheat. Across more than 90 Oklahoma site-years, what do we know about pre-plant, split, and in-season N and when does paying more for in-season N make economic sense?

Brian Arnall: Precision Nutrient Management Extension Specialist, Oklahoma State University In 2020, we published a summary of four OSU trial series comparing pre-plant nitrogen (N) to in-season N …

08/11/2026

This ground always intrigues. In drought’s the alluvial patterns of formation show up, more-so in the soy. In the 2nd photo you can see a P&K by wheat cover project. One side crimped wheat at flag leaf with beautiful stand the other side no cover, notill following soy, marginal stand. One died sooner.

08/11/2026

Some great conversations on X from Monday's post about Sulfur and nutrient $. So I am adding AMS and ATS to the weekly price report, along with Nutrient cost. $/lb.

08/11/2026

Oklahoma pasture and hay producers: this is one pest we want to find early—if it gets here.

The pasture mealybug has not been detected in Oklahoma, but it is spreading rapidly in neighboring states and has already been confirmed in 70 Texas counties. This tiny insect feeds on grasses, including bermudagrass and bluestems, and infestations can lead to severe pasture dieback.

Ashleigh M. Faris1, Kelly Seuhs1, and Kenny Naylor2 1Department of Entomology and Plant Pathology, Oklahoma State University 2Consumer Protection Services, Oklahoma Department of Agriculture, Food,…