Soil organic carbon, aggregate stability and biochemical activity under tilled and no-tilled agroecosystems · Knowledge Library

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Soil organic carbon, aggregate stability and biochemical activity under tilled and no-tilled agroecosystems · Knowledge Library

soil organic carbon (SOC)

↑ 33

increase
no-till (NT) vs. conventional tillage (CT)significant · 0–15 cm · August–September2019 · Beresford · Langford · Woonsocket · 0–5 and5–15cm; Beresford28yr, producer fields>25yr (four within-field subareas)
Numbers
- treatment 30.3 vs. control 23.6 g kg-1 (+28.39 %) · 0–5 cm · Beresford
- treatment 27.1 vs. control 20.2 g kg-1 (+34.16 %) · 5–15 cm · Beresford
- treatment 26.9 vs. control 23.9 g kg-1 (+12.55 %) · 0–5 cm · Langford
- treatment 25.2 vs. control 20.2 g kg-1 (+24.75 %) · 5–15 cm · Langford
- treatment 31 vs. control 23.6 g kg-1 (+31.36 %) · 0–5 cm · Woonsocket
- treatment 27.6 vs. control 18.1 g kg-1 (+52.49 %) · 5–15 cm · Woonsocket
Source · p. 3
“at all three sites, NT treatment significantly increased the SOC than CT treatments at 0–5 and 5–15 cm soil depths.”
increase
natural ecosystem (NE) vs. no-till (NT)significant · 0–15 cm · August–September2019 · Beresford · Langford · Woonsocket
Source · p. 4
“organic carbon was significantly higher under NE followed by NT as compared to CT systems at all the three locations.”
increase
natural ecosystem (NE) vs. conventional tillage (CT)significant · 0–15 cm · August–September 2019 · Beresford · Langford · Woonsocket · 0–5 and 5–15 cm
Numbers
- treatment 35.1 vs. control 23.6 g kg-1 (+48.73 %) · 0–5 cm · Beresford; SOC
- treatment 33.5 vs. control 20.2 g kg-1 (+65.84 %) · 5–15 cm · Beresford; SOC
- treatment 47.3 vs. control 23.9 g kg-1 (+97.91 %) · 0–5 cm · Langford; SOC
- treatment 44.2 vs. control 20.2 g kg-1 (+118.8 %) · 5–15 cm · Langford; SOC
- treatment 60.9 vs. control 23.6 g kg-1 (+158.1 %) · 0–5 cm · Woonsocket; SOC
- treatment 51.3 vs. control 18.1 g kg-1 (+183.4 %) · 5–15 cm · Woonsocket; SOC
Source · p. 3
“NE significantly increased the SOC content in the 0–5 and 5–15 cm soil depth in all the three sites as given in Table 1.”
Source · p. 4
“organic carbon was significantly higher under NE followed by NT as compared to CT systems at all the three locations.”

carbon preservation capacity (CPC)

↑ 33

increase
no-till (NT) vs. conventional tillage (CT)significant · 0–10 cm · August–September 2019 · Beresford · Langford · 1-, 2-, 4-mm aggregate CPC at Beresford and Langford; Woonsocket pairs b/b excluded. Printed percent changes, no calculation.
Numbers
- percent_change 70 · 0–10 cm · Beresford; 1 mm
- percent_change 99 · 0–10 cm · Beresford; 2 mm
- percent_change 77 · 0–10 cm · Beresford; 4 mm
- percent_change 49 · 0–10 cm · Langford; 1 mm
- percent_change 59 · 0–10 cm · Langford; 2 mm
- percent_change 99 · 0–10 cm · Langford; 4 mm
Source · p. 8
“under NT treatments by 70, 99, and 77% and 49, 59, and 99% compared to CT treatment at Beresford and Langford, respectively.”
increase
natural ecosystem (NE) vs. conventional tillage (CT)significant · 0–10 cm · August–September 2019 · Beresford · Langford · Woonsocket · Beresford/Langford 1/2/4-mm CPC; Woonsocket 0.5/1/2/4-mm CPC. Other aggregate classes excluded.
Numbers
- percent_change 185 · 0–10 cm · Beresford; 1 mm
- percent_change 164 · 0–10 cm · Beresford; 2 mm
- percent_change 150 · 0–10 cm · Beresford; 4 mm
- percent_change 178 · 0–10 cm · Langford; 1 mm
- percent_change 166 · 0–10 cm · Langford; 2 mm
- percent_change 250 · 0–10 cm · Langford; 4 mm
- treatment 6.93 vs. control 4.39 g kg-1 (+57.86 %) · 0–10 cm · Woonsocket; 0.5 mm
- treatment 11.5 vs. control 2.87 g kg-1 (+300.7 %) · 0–10 cm · Woonsocket; 1 mm
- treatment 14.4 vs. control 2.75 g kg-1 (+423.6 %) · 0–10 cm · Woonsocket; 2 mm
- treatment 11.8 vs. control 2.52 g kg-1 (+368.3 %) · 0–10 cm · Woonsocket; 4 mm
Source · p. 8
“However, at Woonsocket site, CPC improved significantly under NE treatment compared to CT and NT treatments in 0.5 mm, 1 mm, 2 mm and 4 mm aggregates.”
increase
natural ecosystem (NE) vs. no-till (NT)significant · 0–10 cm · August–September 2019 · Beresford · Langford · Woonsocket · Beresford/Langford 1/2/4-mm CPC; Woonsocket 0.5/1/2/4-mm CPC. Table 5 disjoint letters; no extension to other size classes.
Numbers
- treatment 8.02 vs. control 4.79 g kg-1 (+67.43 %) · 0–10 cm · Beresford; 1 mm
- treatment 8.31 vs. control 6.26 g kg-1 (+32.75 %) · 0–10 cm · Beresford; 2 mm
- treatment 7.27 vs. control 5.15 g kg-1 (+41.17 %) · 0–10 cm · Beresford; 4 mm
- treatment 8.74 vs. control 4.67 g kg-1 (+87.15 %) · 0–10 cm · Langford; 1 mm
- treatment 8.94 vs. control 5.33 g kg-1 (+67.73 %) · 0–10 cm · Langford; 2 mm
- treatment 10 vs. control 5.69 g kg-1 (+75.75 %) · 0–10 cm · Langford; 4 mm
- treatment 6.93 vs. control 3.85 g kg-1 (+80 %) · 0–10 cm · Woonsocket; 0.5 mm
- treatment 11.5 vs. control 4.2 g kg-1 (+173.8 %) · 0–10 cm · Woonsocket; 1 mm
- treatment 14.4 vs. control 4.88 g kg-1 (+195.1 %) · 0–10 cm · Woonsocket; 2 mm
- treatment 11.8 vs. control 3.54 g kg-1 (+233.3 %) · 0–10 cm · Woonsocket; 4 mm
Source · p. 8
“However, at Woonsocket site, CPC improved significantly under NE treatment compared to CT and NT treatments in 0.5 mm, 1 mm, 2 mm and 4 mm aggregates.”

Sites

Beresford

Location: Beresford, South Dakota, USA
Climate: 6 °C mean annual temperature564 mm annual precipitation
Land use: corn-soybean cropping systemArable land

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
general site soil (depth not stated)	silt clay loam	–	5.92 pH	–	–

Langford

Location: Langford, South Dakota, USA
Climate: 6 °C mean annual temperature564 mm annual precipitation
Land use: corn-soybean cropping systemArable land

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
general site soil (depth not stated)	silt loam	–	6.06 pH	–	–

Woonsocket

Location: Woonsocket, South Dakota, USA
Climate: 6 °C mean annual temperature564 mm annual precipitation
Land use: corn-soybean cropping systemArable land

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
general site soil (depth not stated)	silt clay loam	–	6.55 pH	–	–