Abstract
For three consecutive years American hybrid maize was grown, under replicated experimental conditions, in the south of England. Each season, the influence of the spacing of the plants and the use of nitrogenous fertilizer on the yield and composition of the crop and of its separate portions of leaf, stem and cob was investigated. The growth of the maize, and especially its yield of dry matter, were influenced by the weather conditions during the season. The weight of fresh crop varied, with season and treatment, from 126 to 278 (averaging 209), and of dry matter from 20 to 70 (averaging 50) cwt./acre. Thinning below the established plant populations of up to 30,000 plants per acre regularly reduced these yields. Top-dressing with sulphate of ammonia increased them in 1947 and 1949, but decreased them in 1948. The yield of crude protein varied from 2.2 to 5.0, and of soluble carbohydrates from 12 to 46 cwt./acre. The top-dressing increased the protein content of all portions of the plant. The cob contributed, on a weight basis, 46% of the fresh crop, 49% of its dry matter, 54% of its crude protein and 54% of its soluble carbohydrates. Details are given of the chemical composition of the whole plant, and of its separate leaf, cob and stem, for each season and treatment. A later paper will deal with the making of silage from the maize crops and with the yield, composition and nutritive value of the silage.
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Claims 13
Claim · model-written summary
Weather conditions influenced maize growth and dry matter yield.
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth of the maize, and especially its yield of dry matter, were influenced by the weather conditions during the season.”
Claim · model-written summary
Fresh crop weight ranged from 126 to 278 cwt./acre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of fresh crop varied, with season and treatment, from 126 to 278 (averaging 209), and of dry matter from 20 to 70 (averaging 50) cwt./acre.”
t0“maize”
Claim · model-written summary
Dry matter weight ranged from 20 to 70 cwt./acre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of fresh crop varied, with season and treatment, from 126 to 278 (averaging 209), and of dry matter from 20 to 70 (averaging 50) cwt./acre.”
t0“maize”
Claim · model-written summary
Thinning below established populations up to 30,000 plants per acre reduced yields.
- Treatment
- Thinning below the established plant populations of up to 30,000 plants per acree0
- Outcome
- yieldse0
- Direction
- reducede0
- Comparator
- established plant populations of up to 30,000 plants per acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thinning below the established plant populations of up to 30,000 plants per acre regularly reduced these yields.”
t0“maize”
Claim · model-written summary
Sulphate of ammonia top dressing increased yields in 1947 and 1949.
- Treatment
- Top-dressing with sulphate of ammoniae0
- Outcome
- yieldt0
- Direction
- increasede0
- Qualifier
- 1947 and 1949e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top-dressing with sulphate of ammonia increased them in 1947 and 1949, but decreased them in 1948.”
t0“maize for silage in the south of England Part I. The yield and composition”
Claim · model-written summary
Sulphate of ammonia top dressing decreased yields in 1948.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top-dressing with sulphate of ammonia increased them in 1947 and 1949, but decreased them in 1948.”
t0“maize for silage in the south of England Part I. The yield and composition”
Claim · model-written summary
Crude protein yield varied from 2.2 to 5.0 cwt./acre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of crude protein varied from 2.2 to 5.0, and of soluble carbohydrates from 12 to 46 cwt./acre.”
t0“maize”
Claim · model-written summary
Soluble carbohydrate yield varied from 12 to 46 cwt./acre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of crude protein varied from 2.2 to 5.0, and of soluble carbohydrates from 12 to 46 cwt./acre.”
t0“maize”
Claim · model-written summary
Top dressing increased protein content of leaf, stem, and cob.
- Organ / stage
- all portions of the plante0
- Treatment
- top-dressinge0
- Outcome
- protein contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The top-dressing increased the protein content of all portions of the plant.”
t0“maize”
Claim · model-written summary
The cob contributed 46% of fresh crop weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cob contributed, on a weight basis, 46% of the fresh crop, 49% of its dry matter, 54% of its crude protein and 54% of its soluble carbohydrates.”
t0“maize”
Claim · model-written summary
The cob contributed 49% of dry matter.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cob contributed, on a weight basis, 46% of the fresh crop, 49% of its dry matter, 54% of its crude protein and 54% of its soluble carbohydrates.”
t0“maize”
Claim · model-written summary
The cob contributed 54% of crude protein.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cob contributed, on a weight basis, 46% of the fresh crop, 49% of its dry matter, 54% of its crude protein and 54% of its soluble carbohydrates.”
t0“maize”
Claim · model-written summary
The cob contributed 54% of soluble carbohydrates.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cob contributed, on a weight basis, 46% of the fresh crop, 49% of its dry matter, 54% of its crude protein and 54% of its soluble carbohydrates.”
t0“maize”
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