Abstract
Summer cover crop utilization by no-till vegetable farms is essential for continuous soil protection, especially in the southern United States where intense storms are likely to occur in hot and humid summer months. A field experiment was conducted at the National Soil Dynamics Laboratory in Auburn, AL, USA, between the summers of 2015 and 2017 to determine the effectiveness of an experimental roller/crimper in mechanically terminating summer cover crops. Iron clay peas (Vigna unguiculata, L.) planted on a sandy loam and pearl millet (Penninsetum glaucum, L.) planted on clay soil were selected to determine termination rate effectiveness in single, double, and triple rolling/crimping over the same area. Overall, termination rates for both cover crops were higher for rolling three times (71%) compared to rolling once (55%) or twice (63%). However, cover crop termination was inhibited due to rainfalls on the experimental area during the three-week evaluation period. In 2016, drought conditions and high temperatures (32.6 °C) caused biomass reduction, especially for pearl millet, of over 31% to 39% compared to 2017 and 2015. Rolling provided higher soil-water conservation compared with the non-rolled control due the cover crop mulch layer blocking sunlight, keeping the soil surface cooler and preventing water evaporation. Recurrent rolling did not cause soil compaction above the 2.0 MPa level that inhibits root growth, but changes in soil strength were dependent on the soil moisture content.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Termination rates were higher with rolling three times (71%) than with rolling once.
Verbatim
e1“termination rates for both cover crops were higher for rolling three times (71%) compared to rolling once (55%) or twice (63%)”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
e0“National Soil Dynamics Laboratory in Auburn, AL, USA”
Claim · model-written summary
Termination rates were higher with rolling twice (63%) than with rolling once.
Verbatim
e1“termination rates for both cover crops were higher for rolling three times (71%) compared to rolling once (55%) or twice (63%)”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
Claim · model-written summary
Cover crop termination was inhibited by rainfall during the three-week evaluation period.
Not reportedComparator
Verbatim
e2“cover crop termination was inhibited due to rainfalls on the experimental area during the three-week evaluation period”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
Claim · model-written summary
Drought and high temperature in 2016 reduced pearl millet biomass by 31% to 39% compared with 2017 and 2015.
- Taxon
- pearl millet
Cenchrus americanuse3 - Treatment
- drought conditions and high temperaturese3
- Outcome
- biomasse3
- Direction
- reductione3
- Value
- over 31% to 39%e3
- Comparator
- 2017 and 2015e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“drought conditions and high temperatures (32.6 °C) caused biomass reduction, especially for pearl millet, of over 31% to 39% compared to 2017 and 2015”
Claim · model-written summary
Rolling gave higher soil-water conservation than the non-rolled control, owing to the mulch layer blocking sunlight.
Verbatim
e4“Rolling provided higher soil-water conservation compared with the non-rolled control due the cover crop mulch layer blocking sunlight”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
Claim · model-written summary
Recurrent rolling did not cause soil compaction above 2.0 MPa.
- Taxon
- cover cropst0
- Treatment
- Recurrent rollinge5
- Outcome
- soil compactione5
- Direction
- did not causee5
- Value
- 2.0 MPae5
Not reportedComparator
Verbatim
e5“Recurrent rolling did not cause soil compaction above the 2.0 MPa level that inhibits root growth”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
Claim · model-written summary
Changes in soil strength depended on soil moisture content.
Verbatim
e6“changes in soil strength were dependent on the soil moisture content”
t0“Iron Clay Pea and Pearl Millet Warm-Season Cover Crops”
The same questions in other papers
heat · growth · Cenchrus americanus (pearl millet)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
drought · growth · Cenchrus americanus (pearl millet)Positive and negative results
10 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.