TEXAS A&M AGRILIFE ROLLING PLAINS AGRONOMY PROGRAM

Walter Scott Monfort, Maria Balota, David Jordan, Dan Anco, Emi Kimura, Todd Baughman, Kris Blkcom, Travis Faske, Brendan Zurweller, Naveen Puppala, David Wright, and Mulvaney Michael

INTRODUCTION
Riser and other in-furrow fertilizer products were being recommended at 1-3 gal per acre to improve stand establishment and final yield of peanuts. However, there have been mixed observations on the product performance on peanuts throughout the peanut-belt. The objective of the multi-state in-furrow fertilizer trial was to evaluate an in-furrow fertilizer on stand count, injury, and yield of peanuts.
MATERIALS AND METHODS
The study was conducted in GA, AL, SC, FL, NC, TX, and VT. Treatment included untreated check, riser applied in-furrow at 0.5, 1, 2, and 3 gal/ac. The trial at Texas was conducted at Texas A&M AgriLife Research and Extension Center at Vernon, TX. The trial was planted, dug, and harvested on May 10, October 13, and November 10, 2022, respectively. Runner market-type (GA09B) was planted at 4 seeds/ft into 40 inch spacing. The plot size consisted of 4 rows by 25 ft length. The trial was designed as a randomized complete block design with 4 replications. Data collections were emergence, burn (%), and vigor (1-10) assessed at 8, 10, 12, 14, 16 days after planting.
RESULTS AND DISCUSSION
There was no statistical significance of treatments on all response variables. Average stand count at 6, 8, 10, 14, and 16 DAP were 0.1, 1.6, 1.2, 2.4, and 2.5 plants per ft, respectively (Figure 1). Although the average stand count of untreated check was numerically the highest among all treatments, there was no statistical difference. Average percent burn (avg. 3.8%) and vigor (8.4) were consistent among the measurement dates. Average yields over all treatments were 2964 lb/ac (p>0.5).

Out of 10 total trials conducted over the peanut-belt, stand and yield loss were reported in 7 trials and 2 trials, respectively. 6 trials out of the 10 trials reported the final yield were statistically the same among all treatments. It indicates that the application of riser may harm the peanut performance by reducing yields and/or increasing the total input cost.