Soil and Tillage Research · 2027
Little impact of tillage system on crop yield and soil properties in a 43-years old field experiment on a clay soil in humid continental climate
Keller, T., Etana, A., Bösch, Y., Hellstedt, E., Larsbo, M., Colombi, T., Hosseinpour-Ashenaabad, R., Sjulgård, H., Arrázola-Vásquez, E., Viketoft, M. +3
, Taylor, A., Myrbeck, Å., Hallin, S.
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Little impact of tillage system on crop yield and soil prope…
Abstract
No abstract in the library.
Findings
What changed what, as the paper reports it. Grouped by the measured property. The largest groups are open; open the others as you need them.
SOC stocks
↑ 2↓ 13
- increase
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 0–20 cm · autumn2017 · Uppsala · 0-20cm,ESM;Fig2BtopsoilSTa/CPb,Tukey.05;proseoverallboundsnotassignedtopair
Numbers
- treatment 56 vs. control 44 Mg ha-1 (+27.27 %) · 0–20 cm
Source · p. 4 “Significantly more ( *p \<* 0.001) organic carbon was stored in the top 0.2 m soil in the shallow tillage treatment (mean: 56 Mg ha 1) than in the annually and occasionally ploughed treatments (mean: 44 and 45 Mg ha 1, respectively).”
- decrease
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 20–30 cm · autumn2017 · Uppsala · 20-30cmESM,explicittextsignificantSTvsCP;S2unavailable,prosep<.003notassumedpairalpha;nominalTukey.05threshold
Numbers
- treatment 15 vs. control 21 Mg ha-1 (-28.57 %) · 20–30 cm
Source · p. 4 “Conversely, significantly less ( *p \<* 0.003) SOC was stored in the 0.2–0.3 m layer in the shallow tillage system (mean: 15 Mg ha 1) than in the annually and occasionally ploughed treatment (mean: 21 and 22 Mg ha 1, respectively).”
- increase
continuous shallow tillage vs. continuous mouldboard ploughingp = 0.06 · 0–50 cm · autumn2017 · Uppsala · Integrated0-50cmESM,trendP=.06actualpairFig2B;approximately6Mg/hamore,notannualizedflux
Numbers
- mean_difference 6 · 0–50 cm · approximately,asprinted
Source · p. 4 “The SOC stock in the 0–0.5 m layer tended to be higher in the shallow tillage than in the mouldboard ploughed treatment”
Source · p. 6 “The p-value for the difference in SOC stocks at 0–0.5 m between continuous ploughing and shallow tillage is also shown.”
crop yields
= 22
- no effect
continuous shallow tillage vs. continuous mouldboard ploughingsignificance not stated · 1975-2017,43harvestyears · Uppsala · Allcropsmean;explicitheadlineabsenceofyieldimpact,only3levelomnibusp=.52provided,no pairedtest;not_reported ratherthanpairedNS.
Numbers
- treatment 4,547 vs. control 4,413 kg ha-1 (+3.036 %)
Source · p. 4 “Tillage system had no impact on crop yields”
Source · p. 10 “Crop yields were similar across tillage systems, indicating that there was no benefit of annual or occasional mouldboard ploughing.”
- no effect
occasional ploughing vs. continuous mouldboard ploughingsignificance not stated · 1975-2017,43harvestyears · Uppsala · Allcropsmean;explicitabsenceofyieldbenefit,only3levelomnibusp=.52provided,no pairedtest;not_reported ratherthanpairedNS.
Numbers
- treatment 4,587 vs. control 4,413 kg ha-1 (+3.943 %)
Source · p. 9 “Occasional ploughing had no yield benefit (Table 1)”
Source · p. 10 “Crop yields were similar across tillage systems, indicating that there was no benefit of annual or occasional mouldboard ploughing.”
proportion of biopores
↑ 1= 12
- increase
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · autumn2017 · Uppsala · Upper two sampled positions:Fig1 labels10,20cm;Methods centers5,15cm. Numericdepthfieldsleftnullbecause source mismatch. STa/CPb atboth positions;not uniformwholeprofileeffect.
Source · p. 4 “the proportion of biopores (Fig. 1B) was significantly higher ( *p \<* 0.001) in the shallow tillage than in the ploughed treatments”
Source · p. 5 “The proportion of biopores in relation to soil depth in different tillage systems”
- no effect
continuous shallow tillage vs. continuous mouldboard ploughingnot significant · autumn2017 · Uppsala · Lower two sampled positions:Fig1 labels30,40cm;Methods centers25,35cm. Numericdepthfieldsleftnullbecause source mismatch. STa/CPab sharesa atboth;qualifiesbroadwholeprofileprose.
Source · p. 5 “The proportion of biopores in relation to soil depth in different tillage systems”
Source · p. 5 “different letters indicate significant differences at *p \<* 0.05 within each depth”
bacterial abundance
↑ 1= 12
- increase
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 2–8 cm · autumn2017 · Uppsala · 2-8cm;Fig3A16SSTa/CPb;Sidak.05
Source · p. 6 “Shallow tillage resulted in significantly higher ( *p \<* 0.05) abundance of bacteria and fungi in the upper topsoil soil layer (0.02–0.08 m) compared with the continuously and occasionally ploughed treatments”
- no effect
continuous shallow tillage vs. continuous mouldboard ploughingnot significant · 12–18 cm · autumn2017 · Uppsala · 12-18cm;Fig3A16SSTb/CPb,pairedSidak.05;notomnibusinferred
Source · p. 6 “while no significant differences were found in the lower topsoil layer”
Source · p. 6 “(0.12–0.18 m) (Fig. 3A).”
fungal abundance
↑ 1= 12
- increase
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 2–8 cm · autumn2017 · Uppsala · 2-8cm;Fig3AITSSTa/CPb,pairedSidak.05;notextendedtoOPwhichsharesab
Source · p. 6 “Shallow tillage resulted in significantly higher ( *p \<* 0.05) abundance of bacteria and fungi in the upper topsoil soil layer (0.02–0.08 m) compared with the continuously and occasionally ploughed treatments”
- no effect
continuous shallow tillage vs. continuous mouldboard ploughingnot significant · 12–18 cm · autumn2017 · Uppsala · 12-18cm;Fig3AITSSTab/CPab,pairedSidak.05
Source · p. 6 “while no significant differences were found in the lower topsoil layer”
Source · p. 6 “(0.12–0.18 m) (Fig. 3A).”
SOC content
↑ 11
- increase
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 0–10 cm · autumn2017 · Uppsala · 0-10cmSTvsupperCP0-20cmcomposite;Fig2AupperSTa/CPb. Comparisonreflectssamplingwindows authorsused.
Source · p. 4 “We measured a higher SOC content in the upper topsoil layer and a more pronounced SOC stratification in the shallow tillage treatment (Fig. 2A).”
bacterial and fungal diversity (Shannon H)
↓ 11
- decrease
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 12–18 cm · autumn2017 · Uppsala · 12-18cm,bacterialandfungalShannonHgroup;Fig3BSTb/CPa forboth. Resultsandfigurecorrectabstractupperlayerstatement.
Source · p. 6 “For both bacteria and fungi, a significantly”
Source · p. 7 “lower ( *p \<* 0.05) diversity was obtained in the lower topsoil layer of the shallow tillage system compared with both of the ploughed treatments (Fig. 3B).”
C:N ratio
↓ 11
- decrease
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 0–10 cm · autumn2017 · Uppsala · UppermostsampleST0-10cm,CP0-20cm;explicitSTsignificantlylower,proseP=.03maybeanoveralltest,S2not supplied,pairedalphaunknown
Source · p. 4 “shallow tillage had a significantly lower C:N ratio in the uppermost layer”
K-AL
↓ 11
- decrease
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 25–30 cm · autumn2017 · Uppsala · 25-30cm;explicittextSTlowerthanother treatments;S2not supplied,nominalTukey.05threshold,noexactpairp
Source · p. 4 “The shallow tillage treatment had significantly lower K-AL”
Source · p. 4 “0.25–0.3 m soil layer compared with the other treatments.”
P-AL
↓ 11
- decrease
continuous shallow tillage vs. continuous mouldboard ploughingsignificant · 25–30 cm · autumn2017 · Uppsala · 25-30cm;explicittextSTlowerthanother treatments;S2not supplied,nominalTukey.05threshold,noexactpairp
Source · p. 4 “The shallow tillage treatment had significantly lower K-AL”
Source · p. 4 “and P-AL ( *p \<* 0.05) content in the”
Source · p. 4 “0.25–0.3 m soil layer compared with the other treatments.”
Set-up
Treatments
- tillage system
- continuous shallow tillageReduced tillagecontinuous mouldboard ploughingConventional tillageoccasional ploughingOccasional tillage
Measured
- crop yieldsYield
- Unit
- kg ha-1
- Method
- Plotcombine;allcropmean1975-2017;grain15%moisture,oilseed15%through2005then9%
- proportion of bioporesBiopores
- Unit
- %
- Method
- XrayCT100umvoxels,pores>200um,tubularbioporeclassification;fractionofimagedmacropores
- SOC contentSoil organic carbon
- Unit
- %
- Method
- DrycombustionLecoTruMac
- SOC stocksSoil organic carbon
- Unit
- Mg ha-1
- Method
- Equivalentsoil mass frommeasuredBDandSOC
- bacterial abundanceBacteria
- Unit
- log10 copy g-1 soil DW
- Method
- qPCR16SrRNAgene
- fungal abundanceFungi
- Unit
- log10 copy g-1 soil DW
- Method
- qPCRITS2
- bacterial and fungal diversity (Shannon H)Shannon index
- Method
- Ampliconsequencing16SV3-V4/ITS2;ShannonH
- C:N ratio
- K-ALExchangeable/available potassium
- Method
- Ammoniumacetate-lactate extraction ICP-OES
- P-ALAvailable phosphorus
- Method
- Ammoniumacetate-lactate extraction ICP-OES
Sites
Uppsala
- Location
- Uppsala, Sweden59.80° N, 17.60° E
- Climate
- 6–7.5 °C mean annual temperature500–600 mm annual precipitation
- Soil
- Cambisol (Eutric) · WRB
- Land use
- arable soilArable land
- Management on the whole site
- crop residues retainedResidue retention (no removal), crop rotation, mineral fertilisationInorganic fertilizer
| Depth | Texture | Clay | pH | Organic C | Bulk density |
|---|---|---|---|---|---|
| site soil (characterization depth not stated) | clay | 45.7 % | – | – | – |
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