Intercropping corn with Brachiaria species may reduce overall weed infestation.

Zea mays subsp. mays · weed · Zea mays (maize)Positive and negative results

23 papers in the same direction as this claim · 9 in the opposite direction · 1 reporting no difference from an alternative

1. negative
   Sole baby corn had the highest weed density and biomass.

   Baby Corn-Legumes Intercropping System: II Weed Dynamics and Community Structure · 2013

   Opposite direction

2. no effect
   Strict summer annual rotations did not consistently produce higher summer annual weed seedbanks than wheat rotations.

   Crop Rotation, Cover Crop, and Weed Management Effects on Weed Seedbanks and Yields in Snap Bean, Sweet Corn, and Cabbage · 2008 · compared with rotations involving winter wheat

   Opposite direction

3. negative
   Perennial weeds began to appear after three years of continuous no-tillage corn, while few were observed in conventionally planted corn.

   Planting Corn in Sod and Small Grain Residues with Minimum Tillage¹ · 1976 · compared with conventionally planted corn

   Opposite direction

4. no effect
   Corn planting date did not affect weed biomass across the four site-years.

   Planting Date Impacts on Soil Water Management, Plant Growth, and Weeds in Cover‐Crop‐Based No‐Till Corn Production · 2015

   Opposite direction

5. negative
   91 cm rows produced greater weed growth than 76-cm rows.

   Cultural Practices Affecting Season-Long Weed Control in Irrigated Corn (Zea mays) · 1984 · compared with 76-cm rows

   Opposite direction

6. no effect
   Corn presence did not affect total weed seedling density except in 1994.

   Effect of the Presence or Absence of Corn on Common Lambsquarters (Chenopodium album L.) and Barnyardgrass [Echinochloa crus-galli (L.) Beauv.] Emergence¹ · 2002

   Opposite direction

7. no effect
   Postharvest corn weed management had little effect on viable soil weed seed.

   Crop and Weed Management Effects on Weed Populations in a Short‐Term Corn‐Corn‐Peanut Rotation · 1992

   Opposite direction

8. negative
   Corn gluten plots had twice the weed biomass of rolling cultivator and flamer plots.

   (416) Weed Management in Organic Sweet Corn · 2005 · compared with rolling cultivator and flamer

   Opposite direction

25 papers more in this group

Brachiaria · weed · Zea mays (maize)Results agree

1 paper in the same direction as this claim

1. positive
   Brachiaria was superior to sorghum and pearl millet in mulch volume and in reducing weed infestation.

   FORAGE GRASS COVER CROPS AND THEIR EFFECTS ON CORN DEVELOPMENT AND WEED INFESTATION · 2008 · compared with sorghum and pearl millet

   Same direction

intercropping · weed · Zea mays (maize)Positive and negative results

70 papers in the same direction as this claim · 7 in the opposite direction · 1 reporting no difference from an alternative

1. negative
   Intercropped perennial green manures were ineffective in suppressing weeds.

   Agronomic characteristics and yield of organic maize straw intercropped with perennial green manures · 2016 · compared with maize monoculture

   Opposite direction

2. negative
   Soybean intercropping produced maximum weed density and biomass.

   Evaluation of Organic and Inorganic Mulching as an Integrated Weed Management Strategy in Maize Under Rainfed Conditions · 2018

   Opposite direction

3. negative
   Gliricidia intercropping did not control weeds.

   Influence of corn sowing density and gliricidia intercropping on weed control · 2010

   Opposite direction

4. negative
   Sole cropping had greater weed population and dry matter than intercropped baby corn.

   Study of crop geometry, intercropping systems and nutrient management practices on weed density and yield in baby corn based intercropping systems · 2005 · compared with intercropped baby corn

   Opposite direction

5. no effect
   Sabiá intercropping did not reduce weed growth

   Mimosa caesalpiniifolia intercropping, weeds removal and nitrogen fertilization on maize · 2016

   Opposite direction

6. negative
   Intercropping of corn with chickpea gave the highest weed dry matter (440 g.m-2).

   EFFECT OF INTEGRATED WEED MANAGEMENT METHODS ON YIELD AND YIELD COMPONENTS OF CORN (ZEA MAYS L.) IN KERMANSHAH PROVINCE, IRAN · 2017

   Opposite direction

7. no effect
   Intercropping did not suppress weeds in sweet corn.

   Effect of Planting Patterns and Mulch Types on Weed Growth and Yield of Sweet Corn and Red Bean · 2023

   Opposite direction

8. no effect
   Sabiá intercropping equaled no weeding in weed growth reduction.

   INTERCROPPING CORN WITH A COMBINATION OF TREE SPECIES TO CONTROL WEEDS · 2015 · compared with no weeding

   No difference from an alternative

70 papers more in this group