Abstract
Reducing soil disturbance may limit erosion, but many still consider tillage essential for seedbed preparation, particularly on poorly drained soils. Our objective was to quantify tillage and fertilizer management effects after 45 yr {21 in continuous corn [ Zea mays L.] [CC] and 24 in corn–soybean [ Glycine max (L.) Merr.] [CS] rotation} on a somewhat poorly drained silt loam near Belleville, IL. Four tillage (moldboard plow [MP], chisel tillage [ChT], alternate tillage [AT], and no‐till [NT]) and five fertilizer (no fertilization, N‐only, N+NPK starter, NPK+NPK starter, and NPK broadcast) treatments were evaluated. With N, P, and K fertilizer, yields were similar for tilled and NT treatments, averaging 8.73 Mg ha −1 for CC and 11.93 Mg ha −1 and 3.70 Mg ha −1 for rotated corn and soybean. Below recommended soil‐test values resulted in NT yielding less than tilled treatments even though soil test P, K, and pH were similar. No‐till with N, P, and K increased soil organic matter (OM) to 27.6 g kg −1 (20.5 g kg −1 in all other treatments), with the greatest increase from 0‐ to 5‐cm. No‐till treatments showed stratification of P and K, but it had no effect on yield. No excessive pH stratification was observed. Overall, fertilizer management predominantly influenced crop yield and with complete NPK management non‐tilled yields were similar to tilled, even on flat, somewhat‐poorly drained soils. No‐till with NPK management therefore may allow farmers to maintain high yields while reducing soil and nutrient losses.
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Claims 10
Claim · model-written summary
With N, P and K fertilizer, continuous corn yields were similar for tilled and no-till treatments, averaging 8.73 Mg ha-1.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- NTe1
- Outcome
- yieldse1
- Direction
- similare1
- Value
- 8.73 Mg ha −1e1
- Comparator
- tillede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“continuous corn [ Zea mays L.]”
e1“yields were similar for tilled and NT treatments, averaging 8.73 Mg ha −1”
Claim · model-written summary
With N, P and K fertilizer, yields of rotated corn were similar for tilled and no-till treatments, averaging 11.93 Mg ha-1.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- NTe1
- Outcome
- yieldse1
- Direction
- similare1
- Value
- 11.93 Mg ha −1e1
- Comparator
- tillede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“yields were similar for tilled and NT treatments, averaging 8.73 Mg ha −1 for CC and 11.93 Mg ha −1 and 3.70 Mg ha −1 for rotated corn and soybean”
Claim · model-written summary
With N, P and K fertilizer, soybean yields were similar for tilled and no-till treatments, averaging 3.70 Mg ha-1.
- Taxon
- soybean
Glycine maxe1 - Treatment
- NTe1
- Outcome
- yieldse1
- Direction
- similare1
- Value
- 3.70 Mg ha −1e1
- Comparator
- tillede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“yields were similar for tilled and NT treatments, averaging 8.73 Mg ha −1 for CC and 11.93 Mg ha −1 and 3.70 Mg ha −1 for rotated corn and soybean”
Claim · model-written summary
Below recommended soil-test values, no-till yielded less than tilled treatments even though soil test P, K and pH were similar.
- Treatment
- NTe1
- Outcome
- yieldinge1
- Direction
- lesse1
- Qualifier
- Below recommended soil‐test valuese1
- Comparator
- tilled treatmentse1
Not reportedTaxon
Verbatim
e1“Below recommended soil‐test values resulted in NT yielding less than tilled treatments”
Claim · model-written summary
No-till with N, P and K increased soil organic matter to 27.6 g kg-1, compared with 20.5 g kg-1 in all other treatments.
- Treatment
- No‐till with N, P, and Ke1
- Outcome
- soil organic matter (OM)e1
- Direction
- increasede1
- Value
- 27.6 g kg −1e1
- Qualifier
- 20.5 g kg −1e1
- Comparator
- all other treatmentse1
Not reportedTaxon
Verbatim
e1“No‐till with N, P, and K increased soil organic matter (OM) to 27.6 g kg −1 (20.5 g kg −1 in all other treatments)”
Claim · model-written summary
No-till treatments showed stratification of P and K in the soil.
- Outcome
- stratification of P and Ke1
Not reportedTaxon
Verbatim
e1“No‐till treatments showed stratification of P and K”
Claim · model-written summary
The stratification of P and K in no-till had no effect on yield.
Not reportedTaxonComparator
Verbatim
e1“No‐till treatments showed stratification of P and K, but it had no effect on yield”
Claim · model-written summary
No excessive pH stratification was observed.
- Outcome
- pH stratificatione1
Not reportedTaxon
Verbatim
e1“No excessive pH stratification was observed”
Claim · model-written summary
Fertilizer management predominantly influenced crop yield.
Not reportedTaxonComparatorDirection
Verbatim
e1“fertilizer management predominantly influenced crop yield”
Claim · model-written summary
The authors conclude that no-till with NPK management may allow farmers to maintain high yields while reducing soil and nutrient losses.
- Outcome
- maintain high yields while reducing soil and nutrient lossese1
Not reportedTaxon
Verbatim
e1“No‐till with NPK management therefore may allow farmers to maintain high yields while reducing soil and nutrient losses”
The same questions in other papers
tillage · yield · Glycine max (soybean)Positive and negative results
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286 papers in the same direction as this paper · 812 reporting no difference from an alternative
- positive
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See all 1,099 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.