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Fluid Journal : Fluid Journal 2002-2004
Table 2. Effect of starter composition and placement on corn yield and grain moisture at harvest. Treatment Yield Grain moisture P removal bu/A % lbs P2O5/A Check 180 16.4 63 15-30-10 dribbled over row 181 16.4 63 30-30-10 dribbled over row 177 16.3 62 45-30-10 dribbled over row 181 16.8 63 60-30-10 dribbled over row 191 16.4 67 Yields adjusted to 15.5% moisture. Kovar, National Soils Tilth Lab. of P and K suspensions raises the question of how much soil penetration of P (and K) may occur without tillage incorporation. It is interesting to speculate if high concentrations of K could affect P fixation and increase P vertical mobility. For wheat, the possibility of surface banded starter being effective could mean less disturbance of the seed bed particularly if separate fertilizer openers are being used. Surface bands of nutrients, particularly N, have been proven effective for a number of crops for many years. More recently, the excellent performance of surface banded starters for row crops means that growers with large equipment in reduced-till systems can still reap the benefit of starters without the necessity of separate openers for subsurface 2 x 2 placement. Logistics of handling starters at planting remains a consideration, but for the recorded yield benefits of starters, it is a huge factor to ignore when profits are the ultimate concern. Early Spring 2004 Fluid Journal 3
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