Abstract
Abstract Organic grain producers are interested in interseeding cover crops into corn ( Zea mays L.) in regions that have a narrow growing season window for post-harvest establishment of cover crops. A field experiment was replicated across 2 years on three commercial organic farms in Pennsylvania to compare the effects of drill- and broadcast-interseeding to standard grower practices, which included post-harvest seeding cereal rye ( Secale cereale L.) at the more southern location and winter fallow at the more northern locations. Drill- and broadcast-interseeding treatments occurred just after last cultivation and used a cover crop mixture of annual ryegrass [ Lolium perenne L. ssp. multiflorum (Lam.) Husnot] + orchardgrass ( Dactylis glomerata L.) + forage radish ( Raphanus sativus L. ssp. longipinnatus ). Higher mean fall cover crop biomass and forage radish abundance (% of total) was observed in drill-interseeding treatments compared with broadcast-interseeding. However, corn grain yield and weed suppression and N retention in late-fall and spring were similar among interseeding treatments, which suggests that broadcast-interseeding at last cultivation has the potential to produce similar production and conservation benefits at lower labor and equipment costs in organic systems. Post-harvest seeding cereal rye resulted in greater spring biomass production and N retention compared with interseeded cover crops at the southern location, whereas variable interseeding establishment success and dominance of winter-killed forage radish produced conditions that increased the likelihood of N loss at more northern locations. Additional research is needed to contrast conservation benefits and management tradeoffs between interseeding and post-harvest establishment methods.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 8
Claim · model-written summary
Drill interseeding produced higher fall cover crop biomass than broadcast interseeding.
Verbatim
e0“Higher mean fall cover crop biomass and forage radish abundance (% of total) was observed in drill-interseeding treatments compared with broadcast-interseeding”
e1“cover crop mixture of annual ryegrass [ Lolium perenne L. ssp. multiflorum (Lam.) Husnot] + orchardgrass ( Dactylis glomerata L.) + forage radish ( Raphanus sativus L. ssp. longipinnatus )”
Claim · model-written summary
Drill interseeding produced higher forage radish abundance than broadcast interseeding.
Verbatim
e0“Higher mean fall cover crop biomass and forage radish abundance (% of total) was observed in drill-interseeding treatments compared with broadcast-interseeding”
Claim · model-written summary
Corn grain yield was similar under drill and broadcast interseeding.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- drill-e1
- Outcome
- corn grain yielde0
- Direction
- similare0
- Comparator
- broadcast-interseedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn grain yield and weed suppression and N retention in late-fall and spring were similar among interseeding treatments”
e1“drill- and broadcast-interseeding”
Claim · model-written summary
Weed suppression was similar under drill and broadcast interseeding.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- drill-e1
- Outcome
- weed suppressione0
- Direction
- similare0
- Comparator
- broadcast-interseedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn grain yield and weed suppression and N retention in late-fall and spring were similar among interseeding treatments”
e1“drill- and broadcast-interseeding”
Claim · model-written summary
Late-fall and spring N retention was similar under drill and broadcast interseeding.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- drill-e1
- Outcome
- N retention in late-fall and springe0
- Direction
- similare0
- Comparator
- broadcast-interseedinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N retention in late-fall and spring were similar among interseeding treatments”
e1“drill- and broadcast-interseeding”
e2“corn ( Zea mays L.)”
Claim · model-written summary
Postharvest cereal rye produced more spring biomass than interseeded cover crops at the southern site.
Verbatim
e0“Post-harvest seeding cereal rye resulted in greater spring biomass production and N retention compared with interseeded cover crops at the southern location”
Claim · model-written summary
Postharvest cereal rye produced greater N retention than interseeded cover crops at the southern site.
Verbatim
e0“Post-harvest seeding cereal rye resulted in greater spring biomass production and N retention compared with interseeded cover crops at the southern location”
Claim · model-written summary
Variable establishment and dominance of winter-killed forage radish increased the likelihood of N loss at northern locations.
Verbatim
e0“variable interseeding establishment success and dominance of winter-killed forage radish produced conditions that increased the likelihood of N loss at more northern locations”
The same questions in other papers
transplanting · yield · Zea mays (maize)Results differ
41 papers in the same direction as this paper · 88 reporting no difference from an alternative
- positive
- positive
- positive
126 papers more in this group
See all 130 papers →transplanting · weed · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 4 reporting no difference from an alternative
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →transplanting · growth · Raphanus sativus (radish)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.