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34 bu/A. Yield (bu/A). 21 bu/A. Year. Long-Term Yields. 0.56 bu/A/yr. Yield (bu/A). 0.27 bu/A/yr. Year. Yield Increases. Soybean Recommendations for 2002. Soybean Information Database. http://www.clemson.edu/edisto/soybean/soybean.htm. Topics. Variety Selection. Tillage.

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long term yields

34 bu/A

Yield (bu/A)

21 bu/A

Year

Long-Term Yields
slide2

0.56 bu/A/yr

Yield (bu/A)

0.27 bu/A/yr

Year

Yield Increases

slide4

Soybean

Information Database

http://www.clemson.edu/edisto/soybean/soybean.htm

slide5

Topics

Variety Selection

Tillage

Drilled vs. Wide Rows

Nematode Management

Weed Management

slide7

Multiple Location Yield Data -2001

(Irrigated and Dryland Trials at Blackville

& Irrigated Trial at Florence)

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 4.9 bu/A are assumed to be real with 90% confidence.

slide8

Florence, Dryland – 2001

(Peanut Root-knot)

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 3.0 bu/A are assumed to be real with 90% confidence.

slide9

Blackville, Irrigated – 2001

(Soybean Cyst R3 & 14)

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 8.6 bu/A are assumed to be real with 90% confidence.

slide11

No-Till =

No Yield

slide14

Subsoiled

14 inch depth

16 inches

8 inches

No-Till

for double cropped soybeans a 10 to 15 yield increase from drilled rows can be expected
For double-cropped soybeans, a 10 to 15% yield increase from drilled rows can be expected.

Drilled

Wide

Drilled

Wide

Drilled

Wide

1 WAE

4 WAE

7 WAE

relationship between soybean groundcover and yield
Relationship Between Soybean Groundcover and Yield

% Groundcover

Hypothetical Yield (bushels/acre)

slide18

Drill Seed Double-Cropped Soybeans!!

(NK S73-Z5 - 2001)

42

32

Yield (bu/acre)

38-inch row

7.5-inch row

slide20

Soybean Cyst R3 & R14 - 2001

41

35

24

20

Yield (bu/acre)

slide21

Peanut Root-Knot - 2001

19

15

10

Yield (bu/acre)

6

slide23

26 oz/acre Roundup UltraMax @ 28 DAE

Don’t delay applying Roundup!

slide24

6 oz/A Canopy @ planting

26 oz/A Roundup UltraMax @ 28 DAE

slide25
Single Roundup Application vs. Soil-Applied Herbicide fb Roundup26 oz/acre Roundup UltraMax, 38-inch rows

40

33

Yield (bu/acre)

Rdp @ 28 DAE

Canopy followed by

Rdp @ 28 DAE

slide26

Sequential Roundup Applications vs. Soil-Applied Program

26 oz/acre Roundup UltraMax, 38-inch rows

40

39

Yield (bu/acre)

Python + Dual II Magnum

followed by Rdp @ 28 DAE

Rdp @ 14 DAE followed

by Rdp @ 28 DAE

slide27

Weed Removal Timing

49%

21%

17%

2.5

(Assumed 30 bushel yield potential)

Roundup UltraMax + Application Costs = $14.00/acre = 2.5 bu/acre

Yield Loss

(bu/acre)

Weeks after Soybean Emergence

slide28

Weed Management in Drilled

Roundup Ready Soybeans

  • Roundup at 2 to 3 WAE;

Note:Tank-mix with 0.15 oz/A FirstRate

or 0.33 oz/A Classic if morningglories are

larger than 4 inches.

  • Repeat application 14 days later if needed
slide29

Weed Management in Wide-Row

Roundup Ready Soybeans

- Option 1

  • Soil-applied herbicide at planting
  • Roundup 5 to 6 WAE

- Option 2

  • Roundup 2 WAE
  • Roundup 14 to 21 days later
slide30

Weed Management in

Conventional Soybeans

  • Drilled (7.5-inch rows)
  • Soil-applied herbicide(s) at planting

specific for weed spectrum

  • Postemergence herbicide(s) at

4 WAE if needed

  • Wide Rows (30- to 38-inch rows)
  • Same as above, except postemergence

herbicide must be applied.

slide31

Recommendations

Choose a variety based on

nematode resistance in addition

to yield potential.

Deep tillage is essential on

Coastal Plains soils.

Drill seed double-cropped

soybeans.

slide32

Recommendations

Apply 5 lbs/acre Temik in

conjunction with a nematode-

resistant variety in nematode

infested fields.

Apply postemergence herbicides

in a timely manner.

slide33

Questions?

Bountiful 2002 Harvest!

slide34

Horry County Soybean

Variety Demonstration - 2001

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

Conducted by Bruce Johnson

slide35

Blackville, Dryland – 2001

(Columbia lance)

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 9.2 bu/A are assumed to be real with 90% confidence.

slide36

Blackville, Irrigated - 2001

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 10.1 bu/A are assumed to be real with 90% confidence.

slide37

Florence, Irrigated – 2001

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 5.1 bu/A are assumed to be real with 90% confidence.

slide38

Blackville, Dryland – 2001

Variety Yield

(bu/acre)

Variety Yield

(bu/acre)

* Yield differences larger than 9.2 bu/A are assumed to be real with 90% confidence.

slide39

Richland/Lexington Conventional

Soybean Variety Demonstration - 2001

Variety Yield

(bu/acre)

Conducted by John Oxner