Sign up for email alerts of new Fluid Journal issues!
Fluid Journal : Fluid Journal 2008-2009
Figure 2.Starter fertilizer 2x2 (19-17-0 Zn 15gal/ac) band placement + popup (6-24-6 3gal/ac) in-furrow in comparison to 2x2 only across four different Pioneer hybrids near Butler, IN. 2005, M. Bauer. Figure 3. Starter fertilizer Avail plot. All treatments had 15 gal/ac 22-10-0 .12Zn 2x2. Popup was 3gal/ac 6-18-6 In-furrow. Plot located near Coldwater, MI. 2008, M. Bauer. salt in-furrow compared to 2 x 2 alone, resulted in an average plant height of 2.86 inches taller at the V6 growth stage. Figure 1 shows the visual difference in the plants early in the growing season. In 2005, a study near Butler, Indiana, evaluating four different Pioneer hybrids, resulted in yields gains ranging from 2.9 to 9.2 bu/A by adding popup fertilizer in-furrow in combination with 2 x 2 versus 2 x 2 alone (Figure 2). As phosphorus (P) rates in the 2 x 2 band are reduced, adding low rates of popup in-furrow may help to maintain early growth and yield. Polymers help A relatively new idea for improving starter fertilizer efficiency is adding a polymer product called Avail®. The polymer is a dicarboxylic copolymer that sequesters antagonistic cations out of soil solution around P fertilizers, thereby improving P efficiency. In current studies in NE Indiana, Southern Michigan, and NW Ohio, adding the polymer to current 2 x 2 starter fertilizer or a low salt popup in- furrow has improved early plant and root growth. In high N starters that use a blend of UAN (28%) and 10-34-0, a combination of Avail® and Nutrisphere-N® is used to treat the solution. Nutrisphere-N® is also a polymer that is designed to reduce N loss. At a plot location in Waterloo, Indiana, adding these polymers into a 2 x 2 starter fertilizer (19-17-0 at 15 gal/A) increased early-season plant height an average of 2.8 inches. Visual observations were noted at several plot locations in the spring of 2008 as shown in Figure 3. The addition of Avail® resulted in an increased level of P in the plant when tested at the V6 plant growth stage. The addition of both polymers to a 19- 17-0 (15 gal/A) blend placed in a 2 x 2 band increased P milligrams in the plant tissue by 9 percent (Figure 4). The addition of Avail® with 6-18-6 (3 gal/A) popup placed in-furrow resulted in a 6 percent milligram increase of P in the plant Figure 4. Starter fertilizer study evaluating the Avail and Nutrisphere-N (NSN) additive for total phosphorus in 10 plants at the V6 growth stage. All treatments had 15gal/ac 19-17-0 plus Zn 2x2 except for the control which had zero starter fertilizer. Popup was 3gal/ac 6-18-6 In-furrow. Plot located near Coldwater, MI. 2008, M. Bauer.
Fluid Journal 2005-2007