Abstract
Field experiments on the management of ryegrass/white‐clover pastures for seed production were carried out from 1958 to 1961. Replicated trials with 1 / 6 ‐acre plots compared continuous grazing, rotational grazing and cutting once at the silage stage of growth as methods of pasture management from April to June. An additional mechanical method, gang mowing, was introduced in 1960 and Hayter mowing was used in 1961. In 1958 to 1960 the treatments were studied with and without the application of 70 lb nitrogen per acre. Clover flower heads per square foot, clover seed and ryegrass seed yields were greatest under continuous grazing, although in some years comparable results were obtained from the mechanical defoliation treatments. There were substantial differences between potential and harvested clover seed yields, the latter ranging from 20% to 75% of the potential yield. The weight of ryegrass seed harvested was highest under continuous grazing and least under the cutting treatments. The nitrogenous fertilizer increased the production of herbage dry matter and of ryegrass seed, but greatly reduced clover seed yields. The results are discussed in relation to the influence of weather on the incidence of flowering and the influence of methods of defoliation on flower‐bud emergence. It is concluded that mechanical methods of defoliation can produce yields similar to those obtained under continuous grazing, provided that cutting is carried out at the correct stage of growth.
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Claims 10
Claim · model-written summary
Continuous grazing produced the greatest white clover flower-head density.
- Taxon
- white‐clover
Trifolium repense1 - Treatment
- continuous grazinge0
- Outcome
- Clover flower heads per square foote0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clover flower heads per square foot, clover seed and ryegrass seed yields were greatest under continuous grazing”
e1“white‐clover pastures”
Claim · model-written summary
Continuous grazing produced the greatest white clover seed yield, though mechanical defoliation was comparable in some years.
- Taxon
- white‐cloverTrifolium repense1
- Treatment
- continuous grazinge0
- Outcome
- clover seede0
- Direction
- greateste0
- Qualifier
- in some years comparable resultse0
- Comparator
- mechanical defoliation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“clover seed and ryegrass seed yields were greatest under continuous grazing, although in some years comparable results were obtained from the mechanical defoliation treatments.”
e1“white‐clover pastures”
Claim · model-written summary
Continuous grazing produced the greatest ryegrass seed yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ryegrass seed yields were greatest under continuous grazing”
e1“ryegrass/white‐clover pastures”
Claim · model-written summary
Harvested clover seed yield ranged from 20% to 75% of potential yield.
- Taxon
- white‐cloverTrifolium repense1
- Outcome
- harvested clover seed yieldse0
- Value
- 20% to 75%e0
- Comparator
- potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were substantial differences between potential and harvested clover seed yields, the latter ranging from 20% to 75% of the potential yield.”
e1“white‐clover pastures”
Claim · model-written summary
Harvested ryegrass seed weight was highest under continuous grazing.
- Treatment
- continuous grazinge0
- Outcome
- weight of ryegrass seed harvestede0
- Direction
- higheste0
- Comparator
- cutting treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of ryegrass seed harvested was highest under continuous grazing and least under the cutting treatments.”
Claim · model-written summary
Harvested ryegrass seed weight was lowest under cutting treatments.
- Treatment
- cutting treatmentse0
- Outcome
- weight of ryegrass seed harvestede0
- Direction
- leaste0
- Comparator
- continuous grazinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of ryegrass seed harvested was highest under continuous grazing and least under the cutting treatments.”
Claim · model-written summary
Nitrogen fertilizer increased pasture herbage dry matter.
- Taxon
- ryegrass/white‐cloverTrifolium repens
Loliume1 - Treatment
- nitrogenous fertilizere0
- Outcome
- production of herbage dry mattere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogenous fertilizer increased the production of herbage dry matter and of ryegrass seed”
e1“ryegrass/white‐clover pastures”
Claim · model-written summary
Nitrogen fertilizer increased ryegrass seed production.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogenous fertilizer increased the production of herbage dry matter and of ryegrass seed”
Claim · model-written summary
Nitrogen fertilizer greatly reduced clover seed yield.
TrifoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogenous fertilizer increased the production of herbage dry matter and of ryegrass seed, but greatly reduced clover seed yields.”
Claim · model-written summary
The authors conclude that correctly timed mechanical defoliation can yield as much seed as continuous grazing.
- Treatment
- mechanical methods of defoliatione0
- Outcome
- yields similar to those obtained under continuous grazinge0
- Qualifier
- cutting is carried out at the correct stage of growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mechanical methods of defoliation can produce yields similar to those obtained under continuous grazing, provided that cutting is carried out at the correct stage of growth.”
t0“CLOVER”
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See all 50 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.