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Fluid Journal : Fluid Journal 2002-2004
1 Fluid Journal Fall 2003 Banding Means Higher Yields and Better Return On Investment FFF REVIEW lexibility in placement of fluids has been an agronomic advan- tage of fluid use for over 30 years. One method of placement that has been documented in research and field use of both clear liquids and suspensions as especially advantageous is surface banding. This article will explore those advantages. FORMS OF BANDING Dribbling is a term that has fre- quently been associated with surface applications of nitrogen solutions (UAN) or combinations of UAN and other nutrients on grass and estab- lished wheat. Dribble applications also take the form of sidedressed surface bands of N or N-S solutions on corn, Surface band provides better soil contact, higher nutrient concentrations in bands, diminished nutrient fixation, and greater availability for plant uptake. grain sorghum, and other row crops where fluid is placed close to the row. The term side banding refers to a post- plant sidedress of N or N-S but also can be used to describe a fluid starter place- ment to the side of, or to the side and below the seed. Strip banding has gradually devel- oped to refer more to surface applica- tions of suspensions, particularly in regard to fall or early winter applica- tions of heavy rates of P and K. The term is not captive to use for fall appli- cations for crops such as corn and soy- beans but tends to be used more in con- junction with those cropping systems. However, the term "strip banding" is also associated with at-planting, over- the-row starter applications of N and P for cotton, corn, and occasionally grain sorghum, plus other crops. Let's consider some of the reasons these methods of fluid placement for specified nutrients are agronomically sound. NITROGEN Advantages of surface banding of N for both warm and cool season grasses and for wheat have been amply demon- strated by land grant universities (Table 1). Improved performance of banded UAN has been attributed to: a) better solution penetration of surface residues to the soil surface, b) diminished volatil- ization of ammonia from urea in the so- lution, c) less N tie-up by plant resi- dues, d) higher concentrations of nutri- TABLE 1. SURFACE BANDING ON UAN IMPROVES GRASS RESPONSES TO N Application Fescue Fescue Fescue Brome Brome Fescue Method lb/A lb/A lb/A lb/A lb/A lb/A NoN 3220 3020 2766 1257 4707 --- Broadcast 5906 6544 3534 4758 6412 3842 Surface band 6791 7147 4432 5787 6925 4549 Kansas, 1973-1985 TABLE 2. SURFACE BANDING IMPROVES N USE EFFICIENCY FOR REDUCED TILLAGE ROW CROPS Application Corn-IA Corn-MO Grain Sorghum-KS Corn-MD Method bu/A bu/A lb/A bu/A bu/A Broadcast 188 111 6496 135 99 Surface Band 201 128 7336 158 120 Cartersville Elev. U.ofMO Kansas State U. U.ofMD F
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