Strip-Till: A Closer Look - Semantic Scholar

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Strip-Till: A Closer. Look. Tony J. Vyn, with assistance from farmers, graduate students, technicians, and colleagues. Page 2. Indiana Tillage Data, 1990-2003.
Strip-Till: A Closer Look Tony J. Vyn, with assistance from farmers, graduate students, technicians, and colleagues

Indiana Tillage Data, 1990-2003 (percent of total cropland for specific crop in a no-till system) 70 60

60

59

55

50

60 56

48

40

34

38

30

25

20

22

29 19

10

30 16

34

36

21

24

33 22 21

0 1990

1993

1996

1998

Source: Purdue University-Transect Data

2000

2001

2002

2003

Corn Soybean All Crops

2002 Indiana Cropland Tillage Map Percent of all Corn Fields planted using No-till

2002 Indiana Average is 21%


60% No data available

Source: Purdue University-Transect Data

So What is Problem? Planting Date? Nutrient Availability? Pests? Yields? Maturity?

Poor Stand Establishment?

Corn Response to Tillage and Rotation West Lafayette, IN, (1975-2003) Corn/Soybean

Continuous Corn

Tillage Bu/ac

% of Bu/ac plow yield

Yield Gain for Rotation

% of plow yield

%

Plow

176

---

169

---

5

Chisel

177

100

164

97

8

Ridge*

182

103

167

99

9

No-till

173

98

146

87

18

Corn Yields Following Soybeans, Chisel Vs. No-till, West Lafayette, IN, 1975-2003. 250 Chisel Bushels/acre

200 No-till 150 5 per. Mov. Avg. (Chisel)

100

5 per. Mov. Avg. (No-till) 50 1975

1980

1985

1990

1995

2000

2005

Population densities of Soy. Cyst Nematode under different crop sequences and tillage

Potassium Stratification Long-Term Tillage (IN, 1975-94)

Chisel

Moldboard 0-2"

Depth

2-4" 4-6" 6-8"

0

100

200

Soil K (ppm) Source: Holanda et al. (1998)

No-till

0-2"

0-2"

2-4"

2-4"

4-6"

4-6"

6-8"

6-8"

0 300

100

200

Soil K (ppm)

300 0

100

200

Soil K (ppm)

300

Conservation Tillage Doesn’t Alter K distribution appreciably

Planter Setup and Nutrient Banding?

Mean Soil-test K Stratification at Davis, EC Indiana

Depth (in.)

0-2"

2-6"

6-10"

0

50

100

150

Soil-test K (ppm) Source: Vyn et al., Better Crops #4, 2002

200

250

Soil K variability

High oil corn yields in response to K placement (EC Indiana, 2000-01)

Yield (bu/ac)

200

NoK

Fall K

Starter K

180 160 140 120 100 125

YIELD RESPONSE (bu/a)

RESPONSE OF CORN TO ROW-APPLIED K ON A SILTY CLAY LOAM SOIL (3 yr. avg.) 35 30 25

SOIL TEST K

OPTIMUM V. HIGH

20 15 10 5 0