Abstract
In an attempt to measure the influence of leys on the yield of barley, as a means of measuring soil fertility, details of the yields of barley, fertilizer usage and rotations were collected from a number of Hampshire farms and compared with the average results obtained from the ley fertility experiment at Bridget's Experimental Husbandry farm. In the arable rotation experiment increasing the nitrogen level from 37 to 74 units, increased the barley yield from 20·2 cwt. to 24·3 cwt. Farm number 1 used 43 units of nitrogen compared with 61 units of nitrogen on farm 2. The yield rose from 18·7 to 25·4 cwt. Following 3 years grazed ley at Bridget's and increasing the nitrogen level from 37 to 74 units raised the yield from 25·5 cwt. to 29 cwt. Farms 4 and 5 used 47 units of nitrogen compared with 74 units of nitrogen on farms 7, 8 and 9. The yield rose from 24·7 cwt. to 30 cwt. Farms 6 and 10 obtained 29·1 and 28·7 cwt. from only 49 units of nitrogen and 26 units of nitrogen respectively, by the use of some lucerne leys on farm 6, and by only taking one grain crop on farm 10. A three year ley is therefore probably worth 15 cwt. of increased barley yield in the 3 succeeding crops of grain, when using not less than 26 units of nitrogen. An additional 5 cwt. of barley can be obtained annually by the use of 37 units of nitrogen. A sharp fall in yield in 1956 and 1957 on farm 10 to 217 cwt. may have been due to a reduction in the use of nitrogen, or other causes. Farm number 3, without livestock, obtained 28·1 cwt. when using 86 units of nitrogen. Was this due to the use of a 2 year ley and fallow crop in a six year rotation, or the use of additional nitrogen: farm 8, at the same level of nitrogen, stocking and use of clover, has only gained 2·3 cwt. per acre.
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Claims 11
Claim · model-written summary
Increasing nitrogen from 37 to 74 units raised barley yield in the arable rotation experiment from 20·2 to 24·3 cwt.
- Taxon
- barley
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Hordeum vulgaree0 - Treatment
- increasing the nitrogen level from 37 to 74 unitse1
- Outcome
- barley yielde1
- Direction
- increasede1
- Value
- 20·2 cwt. to 24·3 cwt.e1
- Comparator
- 37e1
- Setting
- arable rotation experimente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“influence of leys on the yield of barley”
e1“In the arable rotation experiment increasing the nitrogen level from 37 to 74 units, increased the barley yield from 20·2 cwt. to 24·3 cwt.”
Claim · model-written summary
After 3 years of grazed ley, increasing nitrogen from 37 to 74 units raised yield from 25·5 to 29 cwt.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- increasing the nitrogen level from 37 to 74 unitse2
- Outcome
- yielde2
- Direction
- raisede2
- Value
- 25·5 cwt. to 29 cwt.e2
- Comparator
- 37e2
- Setting
- 3 years grazed ley at Bridget'se2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e2“Following 3 years grazed ley at Bridget's and increasing the nitrogen level from 37 to 74 units raised the yield from 25·5 cwt. to 29 cwt.”
Claim · model-written summary
On farm 2, 61 units of nitrogen raised barley yield from 18·7 to 25·4 cwt. compared with 43 units on farm 1.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- 61 units of nitrogene3
- Outcome
- yielde3
- Direction
- rosee3
- Value
- 18·7 to 25·4 cwt.e3
- Comparator
- 43 units of nitrogene3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e3“Farm number 1 used 43 units of nitrogen compared with 61 units of nitrogen on farm 2. The yield rose from 18·7 to 25·4 cwt.”
Claim · model-written summary
On farms 7, 8 and 9, 74 units of nitrogen raised barley yield from 24·7 to 30 cwt. compared with 47 units on farms 4 and 5.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- 74 units of nitrogene4
- Outcome
- yielde4
- Direction
- rosee4
- Value
- 24·7 cwt. to 30 cwt.e4
- Comparator
- 47 units of nitrogene4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e4“Farms 4 and 5 used 47 units of nitrogen compared with 74 units of nitrogen on farms 7, 8 and 9. The yield rose from 24·7 cwt. to 30 cwt.”
Claim · model-written summary
On farm 6, barley obtained 29·1 cwt. with 49 units of nitrogen and some lucerne leys.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- lucerne leyse5
- Outcome
- obtainede5
- Value
- 29·1e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e5“Farms 6 and 10 obtained 29·1 and 28·7 cwt. from only 49 units of nitrogen and 26 units of nitrogen respectively, by the use of some lucerne leys on farm 6, and by only taking one grain crop on farm 10”
Claim · model-written summary
On farm 10, barley obtained 28·7 cwt. with 26 units of nitrogen and one grain crop.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- one grain crope5
- Outcome
- obtainede5
- Value
- 28·7e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e5“Farms 6 and 10 obtained 29·1 and 28·7 cwt. from only 49 units of nitrogen and 26 units of nitrogen respectively, by the use of some lucerne leys on farm 6, and by only taking one grain crop on farm 10”
Claim · model-written summary
A three-year ley is probably worth 15 cwt. of increased barley yield over three succeeding grain crops when using at least 26 units of nitrogen.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- three year leye6
- Outcome
- barley yielde6
- Direction
- increasede6
- Value
- 15 cwt.e6
- Qualifier
- not less than 26 units of nitrogene6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e6“A three year ley is therefore probably worth 15 cwt. of increased barley yield in the 3 succeeding crops of grain, when using not less than 26 units of nitrogen”
Claim · model-written summary
Using 37 units of nitrogen may add about 5 cwt. of barley annually.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- use of 37 units of nitrogene7
- Outcome
- barleye7
- Direction
- increaseinferrede7
- Value
- 5 cwt.e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e7“An additional 5 cwt. of barley can be obtained annually by the use of 37 units of nitrogen”
Claim · model-written summary
A sharp fall in yield on farm 10 in 1956 and 1957 may have been due to reduced nitrogen use or other causes.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- yielde1
- Value
- 217 cwt.e1
- Qualifier
- may have been due to a reduction in the use of nitrogen, or other causese1
- Setting
- farm 10e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e1“A sharp fall in yield in 1956 and 1957 on farm 10 to 217 cwt. may have been due to a reduction in the use of nitrogen, or other causes”
Claim · model-written summary
Farm 3 without livestock obtained 28·1 cwt. of barley using 86 units of nitrogen.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- 86 units of nitrogene1
- Outcome
- obtainede1
- Value
- 28·1 cwt.e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e1“Farm number 3, without livestock, obtained 28·1 cwt. when using 86 units of nitrogen”
Claim · model-written summary
Farm 8 gained only 2·3 cwt. per acre with the same nitrogen level, stocking and clover use.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- use of clovere1
- Outcome
- gainede1
- Value
- 2·3 cwt. per acree1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“influence of leys on the yield of barley”
e1“farm 8, at the same level of nitrogen, stocking and use of clover, has only gained 2·3 cwt. per acre”
The same questions in other papers
nitrogen · organism · Hordeum vulgare (barley)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- negative
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See all 9 papers →nitrogen · yield · Hordeum vulgare (barley)Positive and negative results
251 papers in the same direction as this paper · 44 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- negative
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See all 299 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.