Abstract
ABSTRACT In a national survey and through statewide focus groups, organic farmers identified pest management and soil fertility as their most critical vegetable research needs. In response, a long- term experiment was established to compare pepper (Capsicum annuum L.) growth, productivity, insect populations, harvest cullage and postharvest weight loss under conventional and organic management. Treatments from the first 3 years (1998 to 2000) consisted of combinations of two synthetic fertilizer and three compost-based certified organic soil amendments. In addition to the compost treatments, effects of a cover crop of hairy vetch (Vicia villosa Roth) and rye (Secale cereale L.) were evaluated in the organic system from 1999 onward. Pepper growth, harvest weight and marketable fruit numbers were similar in conventional and organic production systems from 1998 to 2000 when 112 kg ha−1 N was applied through synthetic fertilizer or compost. Zone-tillage or incorporation of cover crops prior to planting resulted in pepper weights equivalent to compost treatments in 1999, but in zone-tilled plots in 2000, pepper growth was significantly reduced. Corn borer [Ostrinia nubilalis (Hübner)] larval populations were similar in both systems, with beneficial insect populations greater in the organic system in 1999 only. The number of culled peppers due to insect or disease damage was similar in conventional and organic systems in 1998 and 1999, but greater in the synthetic fertilizer plots in 2000. Postharvest weight loss was similar in the compost (112 kg ha−1 N) and synthetic fertilizer treatments in 1999 and 2000 after three to nine weeks in 10°C storage.
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Claims 8
Claim · model-written summary
Pepper growth, harvest weight, and marketable fruit numbers were similar in conventional and organic systems with 112 kg ha−1 N during 1998 to 2000.
- Taxon
- Peppere0
- Treatment
- organic production systemse0
- Outcome
- Pepper growth, harvest weight and marketable fruit numberse0
- Direction
- similare0
- Comparator
- conventionale0
Not reportedValue
Verbatim
e0“Pepper growth, harvest weight and marketable fruit numbers were similar in conventional and organic production systems from 1998 to 2000 when 112 kg ha−1 N was applied through synthetic fertilizer or compost”
Claim · model-written summary
Cover crop zone tillage or incorporation produced pepper weights equivalent to compost treatments in 1999.
Verbatim
e0“Zone-tillage or incorporation of cover crops prior to planting resulted in pepper weights equivalent to compost treatments in 1999”
Claim · model-written summary
Pepper growth was significantly reduced in zone-tilled plots in 2000.
Not reportedComparator
Verbatim
e0“in zone-tilled plots in 2000, pepper growth was significantly reduced”
Claim · model-written summary
Corn borer larval populations were similar in both production systems.
- Treatment
- both systemse0
- Interactor
- Corn borere0pest
- Outcome
- Corn borer [Ostrinia nubilalis (Hübner)] larval populationse0
- Direction
- similare0
Not reportedTaxonComparator
Verbatim
e0“Corn borer [Ostrinia nubilalis (Hübner)] larval populations were similar in both systems”
Claim · model-written summary
Beneficial insect populations were greater in the organic system in 1999 only.
- Treatment
- organic systeme0
- Interactor
- beneficial insecte0other
- Outcome
- beneficial insect populationse0
- Direction
- greatere0
Not reportedTaxonComparator
Verbatim
e0“beneficial insect populations greater in the organic system in 1999 only”
Claim · model-written summary
Culled pepper numbers due to insect or disease damage were similar between systems in 1998 and 1999.
- Treatment
- organic systemse0
- Outcome
- number of culled peppers due to insect or disease damagee0
- Direction
- similare0
- Comparator
- conventionale0
CapsicumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of culled peppers due to insect or disease damage was similar in conventional and organic systems in 1998 and 1999”
Claim · model-written summary
Culled pepper numbers were greater in synthetic fertilizer plots in 2000.
- Treatment
- synthetic fertilizer plotse0
- Outcome
- number of culled peppers due to insect or disease damagee1
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater in the synthetic fertilizer plots in 2000”
e1“The number of culled peppers due to insect or disease damage was similar”
Claim · model-written summary
Postharvest pepper weight loss was similar after three to nine weeks of storage under compost and synthetic fertilizer treatments.
- Treatment
- compost (112 kg ha−1 N)e0
- Outcome
- Postharvest weight losse0
- Direction
- similare0
- Comparator
- synthetic fertilizer treatmentse0
- Setting
- 10°C storagee0
Not reportedTaxon
Verbatim
e0“Postharvest weight loss was similar in the compost (112 kg ha−1 N) and synthetic fertilizer treatments in 1999 and 2000 after three to nine weeks in 10°C storage”
The same questions in other papers
fertilization · quality: postharvest · Capsicum (peppers)Positive and negative results
1 paper in the same direction as this paper · 3 reporting no difference from an alternative
- positive
- positive
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11 in the opposite direction
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See all 12 papers →cultivation system · pest · Capsicum (peppers)Results agree
1 paper in the same direction as this paper
- 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.