See more from this Session: S4-S8 Graduate Student Poster Competition
Monday, October 17, 2011
Henry Gonzalez Convention Center, Hall C, Street Level
With higher fertilizer costs, farmers are evaluating application rates and considering enhanced efficiency phosphorus (P) applications or treatments. AVAIL®(Specialty Fertilizer Products, Leawood, KS), NutriLife Max® (Advanced Microbial Solutions, Pilot Point, TX), and P©üO₅ Max (Rosen’s Inc., Fairmont, MN) are three commercially-available products that are intended to enhance the efficiency of P fertilizers. The first objective of this research initiated in 2010 was to evaluate the effect of P placement (surface broadcast or strip-till), rate, and type of P enhanced efficiency products on grain yield and P uptake in a corn-soybean rotation. The second objective was to determine the effect of P source, type of P enhanced efficiency product, and aglime (0 or recommended rate) on grain yield and P uptake in a corn-soybean rotation. The research was conducted at three locations in Missouri: the Greenley Memorial Research Center near Novelty, the Delta Center near Portageville, and the Hundley-Whaley Center near Albany. Preliminary results indicate that AVAIL increased corn grain yield 500 kg ha-1 when applied with P in a strip-till band. There was no effect of type of P enhanced efficiency product on grain yield when broadcast applied in a non-till system or when applied with the recommended aglime rate. Strip-till increased plant population 23000 plants ha-1 and test weight 3.9 kg m-3 compared to no-till at Novelty. Lime increased silage yields 2.5 Mg ha-1 when compared to the non-treated control at Novelty, but grain yields were similar among lime treatments. However, lime had no effect on silage yields at Portageville, but grain yields increased 690 kg ha-1. Grain yields were 440 kg ha-1 greater when TSP was used compared to DAP. The corn plots will rotate into soybean and another location will repeat this research in 2011.