Abstract
Effects of tillage, winter cover crops, and inorganic N fertilization on watermelon production were examined in a split-plot factorial experiment. Main plots received tillage or no tillage, whereas cover crops consisted of hairy vetch, winter rye, or a mix. Nitrogen treatments consisted of plus or minus addition of ammonium nitrate. Following melons not receiving inorganic N, vetch produced cover crop total N yields of ≈130 kg·ha –1 , which were four times greater than those obtained with rye. Melon yields and foliar N concentrations obtained without inorganic N fertilization following vetch were similar to those obtained with N fertilization following rye. Available soil N in vetch treatments remained significantly ( P < 0.05) higher than in rye treatments for ≈70 days after melon planting and was greater in tilled treatments. Tillage significantly ( P < 0.05) reduced melon yields by 20% and also reduced soil temperatures compared with no-till treatments. We conclude that N fixed by vetch could sustain watermelon production and no tillage may be useful when soil erosion is a problem.
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Claims 9
Claim · model-written summary
Vetch produced about 130 kg per hectare of cover crop nitrogen without inorganic nitrogen, four times rye.
- Taxon
- Watermelon
Citrullus lanatust0 - Outcome
- cover crop total N yieldse0
- Direction
- greatere0
- Value
- ≈130 kg·ha –1e0
- Qualifier
- four timese0
- Comparator
- ryee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following melons not receiving inorganic N, vetch produced cover crop total N yields of ≈130 kg·ha –1 , which were four times greater than those obtained with rye.”
t0“Watermelon”
Claim · model-written summary
Melon yields after vetch without inorganic nitrogen were similar to yields after fertilized rye.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- without inorganic N fertilization following vetche0
- Outcome
- Melon yieldse0
- Direction
- similare0
- Comparator
- N fertilization following ryee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Melon yields and foliar N concentrations obtained without inorganic N fertilization following vetch were similar to those obtained with N fertilization following rye.”
t0“Watermelon”
Claim · model-written summary
Foliar nitrogen concentrations after vetch without inorganic nitrogen were similar to concentrations after fertilized rye.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- without inorganic N fertilization following vetche0
- Outcome
- foliar N concentrationse0
- Direction
- similare0
- Comparator
- N fertilization following ryee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Melon yields and foliar N concentrations obtained without inorganic N fertilization following vetch were similar to those obtained with N fertilization following rye.”
t0“Watermelon”
Claim · model-written summary
Available soil nitrogen after vetch was higher than after rye for about 70 days.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- vetch treatmentse0
- Outcome
- Available soil Ne0
- Direction
- highere0
- Qualifier
- ≈70 days after melon plantinge0
- Comparator
- rye treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available soil N in vetch treatments remained significantly ( P < 0.05) higher than in rye treatments for ≈70 days after melon planting and was greater in tilled treatments.”
t0“Watermelon”
Claim · model-written summary
Available soil nitrogen was greater under tillage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- tilled treatmentse0
- Outcome
- Available soil Ne0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Available soil N in vetch treatments remained significantly ( P < 0.05) higher than in rye treatments for ≈70 days after melon planting and was greater in tilled treatments.”
t0“Watermelon”
Claim · model-written summary
Tillage reduced melon yields by 20% relative to no tillage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Tillagee0
- Outcome
- melon yieldse0
- Direction
- reducede0
- Value
- 20%e0
- Comparator
- no-till treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage significantly ( P < 0.05) reduced melon yields by 20% and also reduced soil temperatures compared with no-till treatments.”
t0“Watermelon”
Claim · model-written summary
Tillage reduced soil temperatures relative to no tillage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- Tillagee0
- Outcome
- soil temperaturese0
- Direction
- reducede0
- Comparator
- no-till treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage significantly ( P < 0.05) reduced melon yields by 20% and also reduced soil temperatures compared with no-till treatments.”
t0“Watermelon”
Claim · model-written summary
The authors conclude that vetch-fixed nitrogen could sustain watermelon production.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- N fixed by vetch could sustain watermelon productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that N fixed by vetch could sustain watermelon production and no tillage may be useful when soil erosion is a problem.”
t0“Watermelon”
Claim · model-written summary
The authors suggest no tillage where soil erosion is a problem.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- no tillage may be useful when soil erosion is a probleme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that N fixed by vetch could sustain watermelon production and no tillage may be useful when soil erosion is a problem.”
t0“Watermelon”
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See all 21 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.