Field investigations on the effect of foliar fertilization were continued on soybeans during 1977. Results from our 1976 studies have previously been published.
In 1976 we tested a material produced by TVA. We used the same TVA-material in 1977 and in addition, included a commercially available product (Foliantm, manufactured by Allied Chemical Corporation)

Boon-Long, Preeda

Egli, Dennis B.

Murdock, Lloyd W.

Wells, Kenneth L.

English

University of Kentucky

University of KentuckyUKnowledgeAgronomy Notes Plant and Soil Sciences1978Foliar Fertilization of Soybeans - 1977Lloyd W. MurdockUniversity of Kentucky, lmurdock@uky.eduPreeda Boon-LongUniversity of KentuckyDennis B. EgliUniversity of Kentucky, degli@uky.eduKenneth L. WellsUniversity of KentuckyRight click to open a feedback form in a new tab to let us know how this document benefits you.Follow this and additional works at: https://uknowledge.uky.edu/pss_notesPart of the Agronomy and Crop Sciences CommonsThis Report is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in AgronomyNotes by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu.Repository CitationMurdock, Lloyd W.; Boon-Long, Preeda; Egli, Dennis B.; and Wells, Kenneth L., "Foliar Fertilization of Soybeans - 1977" (1978).Agronomy Notes. 109.https://uknowledge.uky.edu/pss_notes/109UNIVERSITY OF KENTUCKYCOLLEGE OF AGRICULTURELexington, Kentucky' 40506COOPERATIVE EXTENSION SERVICEAGRONOMY NOTESVol. 11 No. 2Foliar Fertilization of Soybeans - 1977Lloyd Murdock, Preeda Boon-Long, Dennis Egli, and K.L. WellsField investigations on the effect of foliar fertilization were continued on soy-beans during 1977. Results from our 1976 studies have previously been published (1).In 1976 we tested a material produced by TVA. We used the same TVA-material in1977 and in addition, included a commercially available product (Folian~, manufacturedby Allied Chemical Corporation). Nutrient analysis of both materials is shown in thefollowing table.Special Products Tested i/% Content by WeightProduct Ibs/~a11on N P20s K20 SFolian~ 10 12 6 6 0.5TVA 10 10 2.2 4 • 0.6These materials were field tested at two locations (The University of KentuckyAgricultural Experiment Station Farm at Lexingt~n and on a farm in Graves County,Kentucky) during 1977 at the following rates per application:Folian~ - 10 gal (100 Ibs) per acreTVA 25 gal (250 lbs) per acreEach of these experiments is described in the following discussion.(1) Test at LexingtonSoil type: Lanton silt loam, 0-2% slopes, uneroded.Residual soil test: pH 6.0; P 300+ (VH); K 217 (M)Additional soil application of fertilizer: 60 Ibs K20/A broadcast and disked in.Variety used: Cutler 71Date planted: May 23 in 30-inch rowsStatistical design: Completely randomized block with 4 reps.Plot size: 25 ft long x 4 rows wideThe College of .A~ultu,.euan Equal opportunity Organization authorized to provide research, educational information"nd other services only to individuals and institutions that /unction without regard to "Gee, color, sex or national origin.UNIVERSITY OF KENTUCKY, U.S. DEPARTMENT OF AGRtCUlTURE, AND KENTUCKY COUNTIES, COOPERATING\-2-How foliar materials were applied: applied by hand with a CO 2 back-pack sprayerusing a 4 row boom held 18-inches above top of canopy (No. 8002 TeeJet flat spraynozzle @ 30 p.s.i. liquid pressure). An a~juvant (Tween 80) was mixed with eachmaterial at a 1% volume concentration.Harvest: Yields obtained by hand harvesting 16 ft from the two center rows ofeach plot on September 29, 1977, and then threshing with a small plotthresher. Moisture content of beans at harvest was 11-12%.Treatments tested and results obtained are shown in the following table.Treatment1/Stage of Maturity -When applied Yield (Bu/A), Av. 4 Reps/tmt. No fertilizerFolian, 1 applicationTVA, 1 applicationFo1ian, 1 applicationFo1ian, 2 applicationsTVA, 2 applicationsFo1ian, 3 applications,TVA 3 applications 2/Urea, 3 applications -50.1R - 1 49.4R - 1 48.5R - 3 51.0R - 3, R - 5 51.3R - 3, R - 5 47.1R - 3, R - 5, R - 6 50.9R - 3, R - 5, R - 6 52.3R - 3, R - 5, R - 6 54.1L.S.D. (.05) N.S..>The following table shows the effect of spray¥ng on foliar burn.burn was mild and we do not feel that yields were reduced by this/1.1]jDate at which growth stage reached: R-1 (beginning bloom) July 18; R-3 (beginningpod) Aug. 2; R-5 (beginning seed) August 12; early R-6 (late P9d) August 24.Applied in aqueous solution (25ga1./A) at rate of 25 1bs N/A per application •As indicated, foliarmild burning.Time of Day Sprayed and Climatic ConditionsSprayed at Time of Day Climatic Conditions 1/Foliar Burn -R-1 (July 18) 11 AM 850 F Clear to hazy MildR-3 (August 2) 11 AM 800 F Clear MildR-5 (August 12) late afternoon nOF Cloudy MildR-6 (August 24) late afternoon 800 F Hazy Negligible1.1 TVA product resulted in slightly more burn than Fo1ian at each application-3-(2) Test at Graves CountySoil Type: Collins silt loam, 0-2% slopesAdditional soil application 9f fertilizer: 15-60-60 lbs N-P205-K20/A broadcast.Variety used: EssexDate planted: May 10, in 36-inch rowsStatistical design: randomized complete block with 4 replicationsPlot size: 30 ft long x 12 ft wideHow foliar materials were applied: Applications were made by hand using a CO2back-pack sprayer using a row boom held abo~ 18 inches above the canopy. Bofhmaterials were sprayed at 3 m.p.h. Folian~was applied with 80015 TeeJetflat spray nozzle @ 20 p.s.i. T.V.A. material was applied with 8003 nozzles@25 p.s.i. .Harvest: 15 ft from two center rows of each plot was hand harvested10-5-77, and threshed with a small, plot thresher.4 Reps/tmtYield(Bu/A), Av.Treatments tested and results obtained are shown in the following table.Stage of MaturityWhen appliedTreatmentNo fertilizerFolian, 1 applicationTVA, 1 applicationFolian, 2 applicationsTVA, 2 applicationsFolian, 2 applicationsTVA , 2 applicationsR - 3R - 3R - 3,R - 3,R - 5,R - 5,R - 5R - 5R - 6R - 660.159.064.154.2• 54.358.359.1L.S.B. (.05) N.S.Date at which growth stageseed) August 16; R-6 (full/'/reached: R-3 (beginning pod) August 6; R-5 (beginningseed) August 25.Time of Day SprayedSprayed atR-3 (August 6)R-5 (August 16)R-6 (August 25)Time of Day6 PM5 PM7 PMFoliar BurnNoneNoneNoneThe results we have obtained in Kentucky during the past two years are verysimilar to those obtained in similar tests by other agricultural colleges., .'-4-SUMMARY OF STUDIES1 - As in 1976, none of the foliar treatments we tested increased yields above thecheck treatment.2 - Varying the first application from beginning bloom (R-l) to beginning pod (R-3)to beginning seed (R-S) had no influence on response.3 - Varying the number of applications from 1-3 had no influence on yield response.4 - Foliar burn observed was not judged to be hsrmfu1 to yields.REFERENCES(1) Wells, K.L., et. al.10:6, February 1977."Foliar Fertilization of Soybeans." Agronomy Notes.University of Kentucky Agronomy Department ••/~LtduJKe nethL:WelIsExtension Soil Specialist

Foliar Fertilization of Soybeans - 1977

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Foliar Fertilization of Soybeans - 1977

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