Abstract
Municipal sewage sludge, previously amended with Eucalyptus tree trimmings and composted, was incorporated to a depth of 30 cm at rates of 0, 12.3 and 24.6 dry MT/ha for a field planting of onion, snapdragon, turf and spinach. In a similar subsequent planting, the sludge compost was incorpoated to a depth of 10 cm. Additional treatments address the residual effect of the material. The results indicated sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops. No buildup of heavy metals, soluble salts or changes in soil pH that would depress crop growth were detected. Two greenhouse experiments employed equivalent rates and the same four crops. Two materials, sludge compost and heat-dried sludge were compared. The former contained composted Eucalyptus tree trimmings. The latter did not. The results showed both materials were equally beneficial to crop growth and the presence of Eucalyptus trimmings did not decrease yields
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Claims 11
Claim · model-written summary
Sludge compost at 30 cm did not change onion yield.
- Taxon
- onion
Allium cepae1 - Treatment
- sludge compost incorporated to a depth of 30 cme0
- Outcome
- crop yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 10 cm significantly increased onion yield.
- Taxon
- onionAllium cepae1
- Treatment
- incorporated to a depth of 10 cme0
- Outcome
- yieldse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 30 cm did not change snapdragon yield.
- Taxon
- snapdragon
Antirrhinum majuse1 - Treatment
- sludge compost incorporated to a depth of 30 cme0
- Outcome
- crop yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 10 cm significantly increased snapdragon yield.
- Taxon
- snapdragonAntirrhinum majuse1
- Treatment
- incorporated to a depth of 10 cme0
- Outcome
- yieldse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 30 cm did not change turf yield.
- Taxon
- turfe1
- Treatment
- sludge compost incorporated to a depth of 30 cme0
- Outcome
- crop yieldse0
- Direction
- no effecte0
Not reportedComparator
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 10 cm significantly increased turf yield.
Not reportedComparator
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 30 cm did not change spinach yield.
- Taxon
- spinach
Spinacia oleraceae1 - Treatment
- sludge compost incorporated to a depth of 30 cme0
- Outcome
- crop yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
Sludge compost at 10 cm significantly increased spinach yield.
- Taxon
- spinachSpinacia oleraceae1
- Treatment
- incorporated to a depth of 10 cme0
- Outcome
- yieldse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sludge compost incorporated to a depth of 30 cm had no effect on crop yields, but when incorporated to a depth of 10 cm there was a significant increase in yields for all test crops”
e1“onion, snapdragon, turf and spinach”
Claim · model-written summary
No soil buildup of heavy metals or soluble salts or adverse pH change was detected.
Verbatim
e0“No buildup of heavy metals, soluble salts or changes in soil pH that would depress crop growth were detected.”
Claim · model-written summary
Sludge compost and heat-dried sludge benefited crop growth equally.
Verbatim
e0“both materials were equally beneficial to crop growth and the presence of Eucalyptus trimmings did not decrease yields”
Claim · model-written summary
Eucalyptus trimmings did not decrease crop yields.
Not reportedComparator
Verbatim
e0“both materials were equally beneficial to crop growth and the presence of Eucalyptus trimmings did not decrease yields”
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See all 530 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.