Comparison of Five Tillage Systems in Coastal Plain Soils for Cotton Production · Knowledge Library

BonaResKnowledge Library

Comparison of Five Tillage Systems in Coastal Plain Soils for Cotton Production · Knowledge Library

taproot length

↑ 1= 12

increase
deep tillage systems: conventional and three strip-till systems vs. no-tillsignificant · six weeks after planting2002–04 · Edisto Research & Education Center (Edisto REC) · All four deep-tillage variants, both water regimes2002 and both tillage frequencies2003/04, controlled traffic; LSD.05 letters compare within each water/frequency column.
Numbers
- treatment 40 vs. control 18 cm (+122.2 %) · 2002 irrigated · conventional versusNT
- treatment 40 vs. control 18 cm (+122.2 %) · 2002 irrigated · straight shank versusNT
- treatment 40 vs. control 18 cm (+122.2 %) · 2002 irrigated · Paratill versusNT
- treatment 39 vs. control 18 cm (+116.7 %) · 2002 irrigated · Terra Max versusNT
- treatment 34 vs. control 14 cm (+142.9 %) · 2002 dryland · conventional versusNT
- treatment 34 vs. control 14 cm (+142.9 %) · 2002 dryland · straight shank versusNT
- treatment 35 vs. control 14 cm (+150 %) · 2002 dryland · Paratill versusNT
- treatment 35 vs. control 14 cm (+150 %) · 2002 dryland · Terra Max versusNT
- treatment 38.9 vs. control 18.6 cm (+109.1 %) · 2003 first-year tillage only · conventional versusNT
- treatment 38.4 vs. control 18.6 cm (+106.5 %) · 2003 first-year tillage only · straight shank versusNT
- treatment 39.2 vs. control 18.6 cm (+110.8 %) · 2003 first-year tillage only · Paratill versusNT
- treatment 38.8 vs. control 18.6 cm (+108.6 %) · 2003 first-year tillage only · Terra Max versusNT
- treatment 41.6 vs. control 19.9 cm (+109 %) · 2003 annual tillage · conventional versusNT
- treatment 40.2 vs. control 19.9 cm (+102 %) · 2003 annual tillage · straight shank versusNT
- treatment 41 vs. control 19.9 cm (+106 %) · 2003 annual tillage · Paratill versusNT
- treatment 40.3 vs. control 19.9 cm (+102.5 %) · 2003 annual tillage · Terra Max versusNT
- treatment 37.6 vs. control 17.3 cm (+117.3 %) · 2004 first-year tillage only · conventional versusNT
- treatment 37.2 vs. control 17.3 cm (+115 %) · 2004 first-year tillage only · straight shank versusNT
- treatment 37.9 vs. control 17.3 cm (+119.1 %) · 2004 first-year tillage only · Paratill versusNT
- treatment 37.5 vs. control 17.3 cm (+116.8 %) · 2004 first-year tillage only · Terra Max versusNT
- treatment 42.9 vs. control 20.4 cm (+110.3 %) · 2004 annual tillage · conventional versusNT
- treatment 42.7 vs. control 20.4 cm (+109.3 %) · 2004 annual tillage · straight shank versusNT
- treatment 44.1 vs. control 20.4 cm (+116.2 %) · 2004 annual tillage · Paratill versusNT
- treatment 43.5 vs. control 20.4 cm (+113.2 %) · 2004 annual tillage · Terra Max versusNT
Source · p. 5
“Cotton taproots measured six weeks after planting were longer in all plots receiving subsoiling than in the no-till plots.”
Source · p. 12
“cotton taproots measured six weeks after planting were longer in all plots receiving subsoiling (subsoiled either only in 2002 or in every year) than in the no-till plots.”
no effect
annual deep tillage vs. deep tillage in2002 onlynot significant · six weeks after planting2003 · Edisto Research & Education Center (Edisto REC) · Across tillage plots, explicit nonsignificance of reported6% numerical increase; no frequency-test alpha stated.
Source · p. 9
“Although not statistically different, annual deep tillage increased taproot length by 6%.”

root dry weight

↑ 22

increase
deep tillage systems: conventional and three strip-till systems vs. no-tillsignificant · six weeks after planting2002–04 · Edisto Research & Education Center (Edisto REC) · All four deep-tillage variants, both water regimes2002 and both frequencies2003/04; LSD.05 within columns, not tests across frequencies.
Numbers
- treatment 32.8 vs. control 25.4 g (+29.13 %) · 2002 irrigated · CT versusNT
- treatment 35.5 vs. control 25.4 g (+39.76 %) · 2002 irrigated · straight shank versusNT
- treatment 33.9 vs. control 25.4 g (+33.46 %) · 2002 irrigated · Paratill versusNT
- treatment 32.8 vs. control 25.4 g (+29.13 %) · 2002 irrigated · TerraMax versusNT
- treatment 30.1 vs. control 14.8 g (+103.4 %) · 2002 dryland · CT versusNT
- treatment 28.6 vs. control 14.8 g (+93.24 %) · 2002 dryland · straight shank versusNT
- treatment 28.3 vs. control 14.8 g (+91.22 %) · 2002 dryland · Paratill versusNT
- treatment 28.1 vs. control 14.8 g (+89.86 %) · 2002 dryland · TerraMax versusNT
- treatment 22.7 vs. control 14.1 g (+60.99 %) · 2003 first-only · CT versusNT
- treatment 21.7 vs. control 14.1 g (+53.9 %) · 2003 first-only · straight shank versusNT
- treatment 25.9 vs. control 14.1 g (+83.69 %) · 2003 first-only · Paratill versusNT
- treatment 25.9 vs. control 14.1 g (+83.69 %) · 2003 first-only · TerraMax versusNT
- treatment 26.5 vs. control 8.3 g (+219.3 %) · 2003 annual · CT versusNT
- treatment 27.2 vs. control 8.3 g (+227.7 %) · 2003 annual · straight shank versusNT
- treatment 33.9 vs. control 8.3 g (+308.4 %) · 2003 annual · Paratill versusNT
- treatment 32.7 vs. control 8.3 g (+294 %) · 2003 annual · TerraMax versusNT
- treatment 33.1 vs. control 25.1 g (+31.87 %) · 2004 first-only · CT versusNT
- treatment 34.9 vs. control 25.1 g (+39.04 %) · 2004 first-only · straight shank versusNT
- treatment 34.6 vs. control 25.1 g (+37.85 %) · 2004 first-only · Paratill versusNT
- treatment 32.3 vs. control 25.1 g (+28.69 %) · 2004 first-only · TerraMax versusNT
- treatment 32.2 vs. control 25.2 g (+27.78 %) · 2004 annual · CT versusNT
- treatment 32.8 vs. control 25.2 g (+30.16 %) · 2004 annual · straight shank versusNT
- treatment 39.8 vs. control 25.2 g (+57.94 %) · 2004 annual · Paratill versusNT
- treatment 39.1 vs. control 25.2 g (+55.16 %) · 2004 annual · TerraMax versusNT
Source · p. 5
“Cotton taproots measured six weeks after planting were longer in all plots receiving subsoiling than in the no-till plots. This occurred in both the irrigated and the dry land experiments (Table 1). Similar results were obtained with total root dry weight.”
Source · p. 10
“No-Till 18.6 b 14.1 b 19.9 b 8.3 c”
Source · p. 12
“No-Till | 17.3 b | 25.1 b | | 20.4 b | 25.2 c”
increase
bent-leg strip-till variants vs. conventional and straight-shank systemssignificant · six weeks after planting2003–04 · Edisto Research & Education Center (Edisto REC) · Both bent-leg variants versus both conventional/straight-shank variants; Table4/5 annual columns a versus b,LSD.05; separately agreeing comparisons.
Numbers
- treatment 33.9 vs. control 26.5 g (+27.92 %) · 2003 · Paratill versusCT
- treatment 33.9 vs. control 27.2 g (+24.63 %) · 2003 · Paratill versus straight shank
- treatment 32.7 vs. control 26.5 g (+23.4 %) · 2003 · TerraMax versusCT
- treatment 32.7 vs. control 27.2 g (+20.22 %) · 2003 · TerraMax versus straight shank
- treatment 39.8 vs. control 32.2 g (+23.6 %) · 2004 · Paratill versusCT
- treatment 39.8 vs. control 32.8 g (+21.34 %) · 2004 · Paratill versus straight shank
- treatment 39.1 vs. control 32.2 g (+21.43 %) · 2004 · TerraMax versusCT
- treatment 39.1 vs. control 32.8 g (+19.21 %) · 2004 · TerraMax versus straight shank
Source · p. 9
“for plots, which were tilled every year, total root dry weight were higher for the Paratill and Terra Max strip-till systems than the convention and straight-shank strip-till tillage systems.”
Source · p. 12
“for plots which were tilled every year (2002, 2003, and 2004), total root dry weight were higher for the Paratill and Terra Max strip-till systems than the convention and straight-shank strip-till tillage systems.”

Sites

Edisto Research & Education Center (Edisto REC)

Location: Barnwell County, SC
Soil: Paleudults (Plinthic, Fine, kaolinitic, thermic) · USDA
Land use: cotton fieldArable land

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
Varina soil (depth not stated)	loamy sand	–	–	–	–