Abstract
Two field experiments were carried out at Sakha Agricultural Researech Station on the Egyptian cotton cultivar Giza 88 during 1998 and 1999 seasons to study the effect of sowing dates (25 March, 10 and 25 April) and N-levels (40, 60 and 80 kg/fed.) on growth, earliness and yield of cotton. Split-plot design with four replications was used. Results obtained revealed that early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem, number of open bolls per plant, boll weight, seed index, lint percentage, number of days to the first flower appearance, days to crack the first boll and earliness percentage and seed cotton yield, per plant and feddan, while plant height, internode length, number of monopodial branches, number of true leaves at 80 days age, first sympodium position and stand of plant at harvest were decreased. On the other hand, increasing nitrogen levels up to 80 kg/fed. had significantly increased plant, length and number of internodes on the main stem, number of monopodia and sympodia per plant, number of true leaves at 80 days age, weight and number of open bolls/plant, seed index and seed cotton yield per plant and feddan. On the contrary, higher N. levels delayed the appearance of first flower, cracking the first boll, produced the 1st sympodium on higher mode and decreased earliness percentage. The interaction between sowing dates and N. levels had no significant effect on all traits in this study except the number of open bolls/plant in the first season. Best results were obtained when cotton plants were sown early (25 March) and fertilized with 80 kg N/fed. While in case of late sowing (25 April) the nitrogen level reduced to 40 kg/feddan. In general, it could be concluded that early sowing gave the proper yield per feddan than the late planting.
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Claims 18
Claim · model-written summary
Early sowing significantly increased internode and sympodium number.
- Taxon
- EGYPTIAN COTTON
.jpg?width=60)
Gossypium barbadenset0 - Treatment
- early sowing (25 March)e0
- Outcome
- number of internodes and sympodia on the main-steme0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing significantly increased open boll number, boll weight and seed index.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e0
- Outcome
- number of open bolls per plant, boll weight, seed indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem, number of open bolls per plant, boll weight, seed index”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing significantly increased lint percentage and seed cotton yield per plant and feddan.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e1
- Outcome
- seed cotton yield, per plant and feddane0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lint percentage, number of days to the first flower appearance, days to crack the first boll and earliness percentage and seed cotton yield, per plant and feddan”
e1“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing increased days to first flower and first boll cracking.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e1
- Outcome
- number of days to the first flower appearance, days to crack the first bolle0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of days to the first flower appearance, days to crack the first boll and earliness percentage”
e1“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing increased earliness percentage.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e1
- Outcome
- earliness percentagee0
- Direction
- increaseinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“days to crack the first boll and earliness percentage and seed cotton yield”
e1“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing decreased height, internode length and monopodial branch number.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e1
- Outcome
- plant height, internode length, number of monopodial branchese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, internode length, number of monopodial branches, number of true leaves at 80 days age, first sympodium position and stand of plant at harvest were decreased.”
e1“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing decreased true leaf number, first sympodium position and harvest stand.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowing (25 March)e1
- Outcome
- number of true leaves at 80 days age, first sympodium position and stand of plant at harveste0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of true leaves at 80 days age, first sympodium position and stand of plant at harvest were decreased.”
e1“early sowing (25 March) had significantly increased number of internodes and sympodia on the main-stem”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Increasing nitrogen to 80 kg/fed. significantly increased plant length, internodes and monopodia.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- increasing nitrogen levels up to 80 kg/fed.e0
- Outcome
- plant, length and number of internodes on the main stem, number of monopodiae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen levels up to 80 kg/fed. had significantly increased plant, length and number of internodes on the main stem, number of monopodia and sympodia per plant”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Increasing nitrogen significantly increased sympodia, true leaves and open boll number.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- increasing nitrogen levels up to 80 kg/fed.e1
- Outcome
- number of true leaves at 80 days age, weight and number of open bolls/plante0
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sympodia per plant, number of true leaves at 80 days age, weight and number of open bolls/plant”
e1“increasing nitrogen levels up to 80 kg/fed. had significantly increased plant, length and number of internodes on the main stem, number of monopodia and sympodia per plant”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Increasing nitrogen significantly increased boll weight, seed index and seed cotton yield.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- increasing nitrogen levels up to 80 kg/fed.e1
- Outcome
- seed index and seed cotton yield per plant and feddane0
- Direction
- increaseinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight and number of open bolls/plant, seed index and seed cotton yield per plant and feddan.”
e1“increasing nitrogen levels up to 80 kg/fed. had significantly increased plant, length and number of internodes on the main stem, number of monopodia and sympodia per plant”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Higher nitrogen delayed first flowering and first boll cracking.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- higher N. levelse0
- Outcome
- appearance of first flower, cracking the first bolle0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher N. levels delayed the appearance of first flower, cracking the first boll”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Higher nitrogen raised the node of the first sympodium.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- higher N. levelse1
- Outcome
- 1st sympodium on higher modee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced the 1st sympodium on higher mode”
e1“higher N. levels delayed the appearance of first flower, cracking the first boll”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Higher nitrogen decreased earliness percentage.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- higher N. levelse1
- Outcome
- earliness percentagee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased earliness percentage.”
e1“higher N. levels delayed the appearance of first flower, cracking the first boll”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Sowing date by nitrogen interaction had no significant effect on most traits.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- interaction between sowing dates and N. levelse0
- Outcome
- all traits in this study except the number of open bolls/plant in the first seasone0
- Direction
- no significant effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction between sowing dates and N. levels had no significant effect on all traits in this study except the number of open bolls/plant in the first season.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Sowing date by nitrogen interaction affected open boll number in the first season.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- interaction between sowing dates and N. levelse1
- Outcome
- number of open bolls/plante0
- Qualifier
- first seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“except the number of open bolls/plant in the first season.”
e1“The interaction between sowing dates and N. levels had no significant effect on all traits in this study except the number of open bolls/plant in the first season.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Authors identify early sowing with 80 kg N/fed. as the best combination.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- sown early (25 March) and fertilized with 80 kg N/fed.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Best results were obtained when cotton plants were sown early (25 March) and fertilized with 80 kg N/fed.”
Claim · model-written summary
Authors recommend 40 kg/feddan nitrogen for late sowing on 25 April.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Outcome
- late sowing (25 April) the nitrogen level reduced to 40 kg/feddane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in case of late sowing (25 April) the nitrogen level reduced to 40 kg/feddan.”
t0“EGYPTIAN COTTON”
Claim · model-written summary
Early sowing gave greater yield per feddan than late planting.
- Taxon
- EGYPTIAN COTTONGossypium barbadenset0
- Treatment
- early sowinge0
- Outcome
- yield per feddane0
- Direction
- higherinferrede0
- Comparator
- late plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early sowing gave the proper yield per feddan than the late planting.”
t0“EGYPTIAN COTTON”
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See all 9 papers →nitrogen · yield · Gossypium barbadense (Egyptian cotton)Results agree
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See all 9 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.