Study

Crop-weed interference as influenced by a leguminous or synthetic fertilizer nitrogen source: II. rotation experiments with crimson clover, field corn, and lambsquarters

  • Published source details Dyck E. & Liebman M. (1995) Crop-weed interference as influenced by a leguminous or synthetic fertilizer nitrogen source: II. rotation experiments with crimson clover, field corn, and lambsquarters. Agriculture, Ecosystems & Environment, 56, 109-120

Actions

This study is summarised as evidence for the following.

Action Category

Incorporate plant remains into the soil that produce weed-controlling chemicals

Action Link
Natural Pest Control
  1. Incorporate plant remains into the soil that produce weed-controlling chemicals

    A series of replicated, randomised, controlled trials in 1989-1990 in Maine, USA (Dyck & Liebman 1995) (partly the same study as Dyck et al. 1995) found incorporating crimson clover Trifolium incarnatum residue reduced weed biomass and increased maize Zea mays growth in some years but not all. In two of four experiments, the weed lambsquarters Chenopodium album had 36-65% lower biomass in crimson clover plots than in plots receiving oat residue and mineral fertilizer, whilst the other two experiments found no difference between treatments. Number of emerging lambsquarters and other weeds was higher in crimson clover plots in one year out of two. Maize biomass was higher in clover than fertilizer plots in one out of two years, by 13-47% in weed-free plots and 50-131% in weedy plots. All plots received crimson clover or oat residue, planted in summer of the previous year and killed and incorporated into the soil in May. Clover and control plots were unfertilized, while fertilizer plots received ammonium nitrate fertilizer at 45 kg N/ha. Maize and lambsquarters were sown in May or June, together in one experiment and lambsquarters alone in the other.

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust