Abstract
Intercropping of corn with legumes is an alternative to corn monocropping and has a number of advantages, for example, lower levels of inputs, lower cost of production and better silage quality than monocrop systems. An experiment was carried out at two sites in 1993 and 1994 to investigate the effects of seeding soybean or lupin alone or in combination with one of three forages (annual ryegrass, Lolium multiflorum Lam.; perennial ryegrass, Lolium perenne L.; red clover, Trifolium pratense L.) on silage yield and quality. The intercrop plots received 90 kg ha −1 less nitrogen fertilizer than monocrop plots, which received 180 kg ha −1 . Corn biomass yield had a variable response to the treatments, but showed no change at most site‐years. Soybean and lupin biomass yields were decreased by intercropping (80–98 % for soybean, and 94–100 % for lupin). However, when corn growth was limited due to poor establishment at one site in 1994, soybean was able to grow well and produce yields similar to those of monocropped soybean. The three underseeded forages did not grow well during the period examined (up to silage harvest) and had no effect on the yield of any crop. Total silage yields were similar to corn monocrop biomass yields even during 1994 at the site with low corn population densities because soybean was able to compensate for reduced corn growth.
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Claims 7
Claim · model-written summary
Corn biomass yield usually did not change under intercropping.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- treatmentse0
- Outcome
- Corn biomass yielde0
- Direction
- no changee0
- Qualifier
- most site‐yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn biomass yield had a variable response to the treatments, but showed no change at most site‐years”
Claim · model-written summary
Soybean biomass yield decreased 80–98% with intercropping.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- intercroppinge0
- Outcome
- Soybean and lupin biomass yieldse0
- Direction
- decreasede0
- Value
- 80–98 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean and lupin biomass yields were decreased by intercropping (80–98 % for soybean, and 94–100 % for lupin)”
Claim · model-written summary
Lupin biomass yield decreased 94–100% with intercropping.
LupinusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean and lupin biomass yields were decreased by intercropping (80–98 % for soybean, and 94–100 % for lupin)”
Claim · model-written summary
Soybean compensated for poorly established corn in one site-year.
- Taxon
- soybeanGlycine maxe0
- Outcome
- yieldse0
- Direction
- similare0
- Comparator
- monocropped soybeane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean was able to grow well and produce yields similar to those of monocropped soybean”
Claim · model-written summary
Underseeded forages grew poorly before silage harvest.
Verbatim
e0“The three underseeded forages did not grow well during the period examined (up to silage harvest)”
Claim · model-written summary
Underseeded forages had no effect on crop yields.
Not reportedComparator
Verbatim
e0“The three underseeded forages did not grow well during the period examined (up to silage harvest) and had no effect on the yield of any crop”
Claim · model-written summary
Total silage yield matched corn monocrop biomass yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- silagee0
- Outcome
- Total silage yieldse0
- Direction
- similare0
- Qualifier
- site with low corn population densitiese0
- Comparator
- corn monocrope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total silage yields were similar to corn monocrop biomass yields even during 1994 at the site with low corn population densities”
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See all 218 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.