Abstract
Abstract Alfalfa ( Medicago sativa L.) establishment techniques commonly produce a soil surface susceptible to high runoff and soil losses prior to crop canopy development. Limited data are available on the erodibility and productivity of alfalfa seedbeds established with conservation tillage systems. Four alfalfa establishment techniques were investigated for runoff, erosion, and forage yield over two growing seasons on a Plano silt loam soil (fine‐silty, mixed, mesic Typic Argiudoll) with a 5% slope in south‐central Wisconsin. Alfalfa seedbeds were established on cropland previously in no‐till (NT) corn ( Zea mays L.). Five simulated rainfalls were applied to moldboard (MB), moldboard‐nurse crop (MB/nc), chisel (CH), and NT alfalfa seedbeds. An additional seedbed investigated was no‐till with surface residue removed (NT/wo) immediately prior to rainfall simulation. Relative to MB, CH treatments reduced runoff volumes by 23 to 72% and NT treatments reduced volumes 59 to 100%. Soil‐loss reductions of 24 to 64% from CH and 71 to 100% from NT relative to MB were observed. Runoff volumes from NT/wo were the largest of all treatments for four of the five rainfall simulations. Soil losses from NT/wo were statistically similar ( P = 0.05) to MB for all rainfall simulations. Comparisons of MB to MB/nc runoff volumes did not indicate an influence of canopy cover on runoff. A MB/nc soil loss of 87% less than MB at a rainfall simulation with MB/nc canopy cover of 93% relative to MB canopy cover of 47% did indicate a canopy effect on soil loss. No significant influence of canopy development on runoff volumes from similar treatments over time was evident. Canopy development contributed to reduced soil losses within all treatments, with a maximum reduction of 96% observed for MB/nc canopy cover of 93% relative to MB/nc soil loss at 0% canopy. Establishment year alfalfa yield and quality did not vary among MB, CH, and NT treatments at a significance level of P = 0.05.
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Claims 11
Claim · model-written summary
Chisel tillage reduced runoff relative to moldboard.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- CH treatmentse0
- Outcome
- runoff volumese0
- Direction
- reducede0
- Value
- 23 to 72%e0
- Comparator
- MBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative to MB, CH treatments reduced runoff volumes by 23 to 72%”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
No till reduced runoff relative to moldboard.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- NT treatmentse0
- Outcome
- volumese0
- Direction
- reducede0
- Value
- 59 to 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT treatments reduced volumes 59 to 100%”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Chisel tillage reduced soil loss.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil‐loss reductions of 24 to 64% from CH”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
No till reduced soil loss.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- NTe0
- Outcome
- Soil‐losse0
- Direction
- reductionse0
- Value
- 71 to 100%e0
- Comparator
- MBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil‐loss reductions of 24 to 64% from CH and 71 to 100% from NT relative to MB were observed”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
No till with residue removed had the largest runoff in four of five simulations.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- NT/woe0
- Outcome
- Runoff volumese0
- Direction
- largeste0
- Value
- four of the five rainfall simulationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Runoff volumes from NT/wo were the largest of all treatments for four of the five rainfall simulations”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Soil loss under no till with residue removed resembled moldboard.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- NT/woe0
- Outcome
- Soil lossese0
- Direction
- statistically similare0
- Comparator
- MBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil losses from NT/wo were statistically similar ( P = 0.05) to MB for all rainfall simulations”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Nurse crop canopy did not influence runoff.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- MB/nce0
- Outcome
- runoff volumese0
- Direction
- did not indicate an influencee0
- Comparator
- MBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparisons of MB to MB/nc runoff volumes did not indicate an influence of canopy cover on runoff”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Nurse crop seedbed reduced soil loss by 87% at 93% canopy cover.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- MB/nce0
- Outcome
- soil losse0
- Direction
- less thane0
- Value
- 87%e0
- Qualifier
- MB/nc canopy cover of 93%e0
- Comparator
- MBe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A MB/nc soil loss of 87% less than MB at a rainfall simulation with MB/nc canopy cover of 93% relative to MB canopy cover of 47%”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Canopy development did not significantly affect runoff over time.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- runoff volumese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant influence of canopy development on runoff volumes from similar treatments over time was evident”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Canopy development reduced soil loss by as much as 96%.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- soil lossese0
- Direction
- reducede0
- Value
- 96%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Canopy development contributed to reduced soil losses within all treatments, with a maximum reduction of 96% observed for MB/nc canopy cover of 93% relative to MB/nc soil loss at 0% canopy”
t0“Tillage and Canopy Cover Effects on Interrill Erosion from First‐Year Alfalfa”
Claim · model-written summary
Alfalfa yield and quality did not differ among tillage treatments.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- MB, CH, and NT treatmentse0
- Outcome
- alfalfa yield and qualitye0
- Direction
- did not varye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Establishment year alfalfa yield and quality did not vary among MB, CH, and NT treatments at a significance level of P = 0.05”
The same questions in other papers
tillage · soil: physics · Medicago sativa (alfalfa)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.