Abstract
1. In four different years, swards of perennial rye-grass/white clover were treated with nitrogenous fertilizer (0, 30 or 60 lb. N per acre) in mid-February to produce an early growth of grass. The effect of the time of the first cut, taken in March or April, on the annual yield was studied. 2. The total annual yield was reduced when an increasing quantity of grass was removed at the first cut because this interfered with the development of inflorescences and reduced yield at the second cut. 3. Fertilizer treatment increased early growth and advanced by 2-14 days the date in spring at which the yield was adequate for grazing; this improvement improvement was small compared with the extent to which this date was affected by differences in the weather from year to year. 4. The response in total annual yield to N averaged 17.2 and 14.9 lb. of dry matter per lb. N respectively for the 30 and 60 lb. N per acre applications. The highest responses were measured when little or no grass was removed at the first cut. Where a larger crop was removed at the first cut the response to N was reduced; exceptionally it was negative.
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Claims 8
Claim · model-written summary
Removing more grass at the first cut reduced total annual yield.
- Taxon
- perennial rye-grass/white clover
Trifolium repens
Lolium perennee1 - Treatment
- an increasing quantity of grass was removed at the first cute0
- Outcome
- total annual yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total annual yield was reduced when an increasing quantity of grass was removed at the first cut”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Greater first-cut removal reduced second-cut yield by interfering with inflorescence development.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Outcome
- yield at the second cute0
- Direction
- reducede0
- Qualifier
- development of inflorescencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this interfered with the development of inflorescences and reduced yield at the second cut”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Nitrogen fertilizer increased early growth.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- Fertilizer treatmente0
- Outcome
- early growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer treatment increased early growth”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Nitrogen fertilizer advanced the date of adequate spring grazing yield by 2-14 days.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- Fertilizer treatmente2
- Outcome
- date in spring at which the yield was adequate for grazinge0
- Direction
- advancede0
- Value
- 2-14 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“advanced by 2-14 days the date in spring at which the yield was adequate for grazing”
e1“perennial rye-grass/white clover”
e2“Fertilizer treatment”
Claim · model-written summary
Annual yield response averaged 17.2 lb dry matter per lb N for the 30 lb N per acre application.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- 30e0
- Outcome
- response in total annual yielde0
- Value
- 17.2e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response in total annual yield to N averaged 17.2 and 14.9 lb. of dry matter per lb. N respectively for the 30 and 60 lb. N per acre applications”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Annual yield response averaged 14.9 lb dry matter per lb N for the 60 lb N per acre application.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- 60 lb. N per acree0
- Outcome
- response in total annual yielde0
- Value
- 14.9 lb. of dry matter per lb. Ne0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response in total annual yield to N averaged 17.2 and 14.9 lb. of dry matter per lb. N respectively for the 30 and 60 lb. N per acre applications”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Nitrogen response was highest when little or no grass was removed at first cut.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- little or no grass was removed at the first cute0
- Outcome
- responsese0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest responses were measured when little or no grass was removed at the first cut”
e1“perennial rye-grass/white clover”
Claim · model-written summary
Removing a larger first-cut crop reduced the nitrogen response, exceptionally making it negative.
- Taxon
- perennial rye-grass/white cloverTrifolium repensLolium perennee1
- Treatment
- a larger crop was removed at the first cute0
- Outcome
- response to Ne0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where a larger crop was removed at the first cut the response to N was reduced; exceptionally it was negative”
e1“perennial rye-grass/white clover”
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