Long-term tillage impacts on soil organic matter components and related properties on a Typic Argiudoll · Knowledge Library

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Long-term tillage impacts on soil organic matter components and related properties on a Typic Argiudoll · Knowledge Library

SOC concentration

↑ 4= 15

increase
No-till vs. Plow tillsignificant · 0–20 cm · spring2014 · University of Nebraska's Rogers Memorial Farm · Significant at0–10cm and integrated0–20cm; individual10–20cm not significant (finding2).
Numbers
- treatment 19.65 vs. control 15.6 g/kg (+25.96 %) · 0–10 cm
- treatment 19.95 vs. control 16.85 g/kg (+18.4 %) · 0–20 cm
Source · p. 3
“At this depth, NT and DD had 1.2 times higher SOC concentration than PT.”
Source · p. 4
“| No-till | 19.15abz | 17.4ab | 19.65a | 19.95a | 2.6 | 14.7 |”
no effect
No-till vs. Plow tillnot significant · 10–100 cm · spring2014 · University of Nebraska's Rogers Memorial Farm
Source · p. 3
“Tillage effect on SOC concentration was significant only at the 0–10 cm depth (Fig. 1).”
increase
Double disk vs. Plow tillsignificant · 0–10 cm · spring2014 · University of Nebraska's Rogers Memorial Farm
Numbers
- treatment 18.95 vs. control 15.6 g/kg (+21.47 %) · 0–10 cm
Source · p. 3
“At this depth, NT and DD had 1.2 times higher SOC concentration than PT.”
increase
No-till vs. Chiselsignificant · 0–20 cm · spring2014 · University of Nebraska's Rogers Memorial Farm · Surface0–10 and integrated0–20; individual10–20 not significant.
Numbers
- treatment 19.65 vs. control 18.2 g/kg (+7.967 %) · 0–10 cm
- treatment 19.95 vs. control 17.95 g/kg (+11.14 %) · 0–20 cm
Source · p. 4
“| No-till | 19.15abz | 17.4ab | 19.65a | 19.95a | 2.6 | 14.7 |”
Source · p. 4
“| Chisel | 18.0bc | 16.4b | 18.2bc | 17.95b | 1.1 | 9.5 |”
increase
Double disk vs. Chiselsignificant · 0–10 cm · spring 2014 · University of Nebraska's Rogers Memorial Farm · Double disk versus chisel individually; abstract distinguishes their SOC response despite both being reduced tillage. Table 2: 2014 surface means a versus bc, LSD p<=0.05.
Numbers
- treatment 18.95 vs. control 18.2 g/kg (+4.121 %) · 0–10 cm · spring 2014
Source · p. 1
“After 33 years, NTand DD management increased SOC by 1.2 times”
Source · p. 4
“| Double disk | 18.55bc | 16.7ab | 18.95a | 18.9ab | 2.2 | 13.2 |”
Source · p. 4
“| Chisel | 18.0bc | 16.4b | 18.2bc | 17.95b | 1.1 | 9.5 |”

Sites

University of Nebraska's Rogers Memorial Farm

Location: near Lincoln, NE40.85° N, 96.47° W
Climate: 693 mm annual precipitation
Soil: Argiudoll (Typic) · USDA
Land use: rainfed fieldsArable land
Management on the whole site: corn–soybean rotationMaize/Corn/Zea mays Soybean/Glycine max, lime, Anhydrous ammoniaAmmonium fertilizer

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
0–20 cm	silty clay loam	–	5 pH	–	–