indicated that banded applications of P increase foliar P when applied annually at the rate of 127.3 kg·ha −1 (113.6 lb/ac) P ( Smith and Cheary, 2013 ). Banded P applications increased leaf P concentrations, ameliorated foliar deficiency symptoms, and
Michael F. Polozola II, Daniel E. Wells, J. Raymond Kessler, Wheeler G. Foshee, Amy N. Wright, and Bryan S. Wilkins
Hatice Gulen, Yasar Erbil, and Atilla Eris
A stock plant etiolation treatment was tested to improve rooting of the important cherry rootstock Gisela-5. To create the etiolation effect, at the beginning of the growing season, banding (blanching) was initiated on stock plants by placing black plastic tape at the base of new shoots for 6 or 10 weeks. Cuttings were excised so that the banded area was at the cutting base. IBA was applied at two concentrations (5 and 10 mm) to the cutting base following wounding and cuttings were placed in perlite (100%) rooting medium under mist. The rooting percentage, number of roots per cutting and root length were measured 4 weeks after planting. Banding and duration significantly stimulated rooting of leafy softwood cuttings. The highest rooting percentage (80.0%) was obtained on cuttings banded for 6 weeks and treated with 5 mm IBA.
Cyrus Samimy and James N. Cummins
We thank C.S.'s 14-year-old son, Sawson, for drawing the 6PGD isozyme banding patterns by computer. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be
Bruce W. Wood
options include 1) broadcasting, 2) banding, or 3) trenching. Broadcast application (over the entire orchard floor or only beneath the tree canopy) typically requires 23 to 114 kg (50 to 250 lbs) Zn sulfate per acre; in addition, the first 2 to 3 years
Xinhua Yin, Jinhe Bai, and Clark F. Seavert
( Ericson, 1993 ). Another alternate N and P fertilizer management is band placement. Band placement can also deliver fertilizer down into the active root zone in bands and reduce the contact of fertilizer with soil, but requires a narrower, more controlled
Michael W. Smith and Becky S. Cheary
high clay content. Wood et al. (2010) demonstrated that banding K within the root zone near a drip irrigation source resulted in substantial K uptake by trees. Worley (1994) conducted a 20-year study to establish the minimum pecan leaf K
Dean A. Kopsell, Carl E. Sams, T. Casey Barickman, and Robert C. Morrow
( Morrow, 2008 ). LEDs now provide the ability to measure impacts of narrow-band wavelengths of light on nutritional values of a variety of specialty crops such as chili pepper [ Capsicum annuum ( Gangadhar et al., 2012 )], cucumber [ Cucumis sativus
C.A. Sanchez, S. Swanson, and P.S. Porter
Five field experiments were conducted from 1986 to 1989 to compare broadcast and band P fertilization of crisphead lettuce (Lactuca sativa L.) on Histosols. Rates of P were 0, 50, 100, 200, and 300 kg P/ha applied broadcast or banded. Broadcast P was surface-applied and disked into the soil 1 day before bedding and planting. Banded P was placed in strips 8 cm wide, 5 cm below the lettuce seeds at planting. Lettuce yields were significantly(P < 0.01) increased by P rate in all experiments. However, significant rate-by -placement interactions indicated that response of lettuce to P varied by placement. Lettuce yields were generally optimized with a band P rate one-third of that required with broadcast placement. Analysis of soil samples collected in the lettuce bed after fertilization indicated that banded P increased available P in the lettuce root zone compared to broadcast fertilization. Lettuce leaf P concentration increased with P rate and generally was greater when P was banded. The critical concentration of P in lettuce leaf tissue at the six- to eight-leaf stage was 0.37%. Banding P fertilizer did not reduce the availability of other essential nutrients, as indicated by tissue analysis.
Joseph M. Kemble and Elizabeth A. Guertal
In 1994, a study was conducted in Crossville, Ala., to determine if differences in leaf P concentration and crop yield occurred when P was applied as either a broadcast or banded treatment. Phosphorus (0, 34, 67, 101, and 134 kg·ha–1) was banded (2 × 2) or broadcast applied and incorporated before planting. Other nutrients were applied based on current recommendations and soil testing. As level of P increased from 0 to 134 kg·ha–1, fresh weight of harvested ears increased quadratically. There was no difference in fresh weight of harvested ears between banding and broadcasting. Yields were not maximized within the range of applied P, although it seems that yield reaches a plateau near the highest rate of applied P. Percent of P in corn ear leaves did not differ among treatments. There was no difference in P leaf concentrations between the banded and broadcast treatments, indicating that response in yield occurred due to rate of P application, not method.
Frank A. Buffone and Don R. La Bonte
Chlorotic Leaf Distortion (CLD) is a common disease of sweetpotato caused by Fusarium lateritium. This fungus is unique among Fusarium species in that it grows on the epidermis of leaves and shoot tips of sweetpotato. Fusarium lateritium appears as a white epiphytic material and under bright sunlight causes leaf chlorosis. When cloudy weather persists for several days, all symptoms disappear.
Researchers who use RAPD to examine banding patterns of sweetpotato DNA assume that foreign DNA present in the cTAB extract is quantitatively low and will not appreciably amplify and appear as bands. In this study we found the modified cTAB procedure used to amplify sweetpotato DNA also amplifies DNA of Fusarium lateritium cultures. DNA banding patterns of infected leaves was compared with those free of the disease. No differences in banding patterns were observed in this preliminary study.