Abstract
This experiment was carried out for two seasons in 2007/2008 and 2008/2009 at the Experimental Farm of Sakha Agricultural Research Station, ARC, Kafr El-Sheikh, Gevernorate, Egypt. The objective of this experiment was to study the effect of four times of potassium application i.e., 100% before transplanting (BT), 50% BT + 50% at 30 days after transplanting (DAT), 50% K at BT + 50% K at 60 DAT and 50% K at 30 DAT + 50% K at 60 DAT. Three urea rates as foliar spray i.e. 2, 4, and 6 g/l on vegetative growth at 90 and 120 DAT, yield and yield components, quality and storability of onion. The main important findings were as follows: 1- Plant height, bulbing ratio, plant fresh weight and plant dry weight recorded maximum mean values by adding 50% of potassium fertilizer at 30 DAT and 50% at 60 DAT at two growth stages in both seasons, except for plant height at 120 DAT in the first season and bulbing ratio at 90 DAT in both seasons. 2- Adding 50% of potassium at 30 DAT and 50% at 60 DAT attained the highest average of bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed. While, adding 50% of potassium before transplanting and 50% at 60 DAT attained the lowest ones in both seasons. 3- Increasing urea rate as foliar spray from 2 to 4 or 6 g/l significantly increased mean values of plant height, plant fresh weight and plant dry weight at two growth stages, in both seasons. 4- Spraying onion plants with 6 g/l of urea attained of average bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed. While spraying onion plants with 2 g/l gave lowest ones of all studied characters, except for culls yield/fed. in the second season. 5- Results showed that highest percentages of TSS% and dry matter% were obtained by adding 50% of potassium before transplanting and 50% at 60 DAT, while the smallest ones were obtained by adding 50% of potassium at 30 DAT and 50% at 60 DAT in both seasons. 6- Increasing urea as foliar spray rate from 2 g/l to 4 or 6 g/l decreased mean values of TSS% and dry matter % in both seasons. 7- Results indicated that highest average of bulb weight, marketable yield/fed. and total yield/fed. were achieved by adding 50% of potassium at 30 DAT and 50% at 60 DAT when plants were sprayed with 6 g/l of urea in both seasons. It could be concluded that adding 50% of potassium at 30 DAT and 50% at 60 DAT and spraying onion plants with 6 g/l of urea.could be recommended for optimum onion yield per unit area.
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Claims 12
Claim · model-written summary
Splitting potassium between 30 and 60 DAT maximized plant height, bulbing ratio, and fresh weight in both seasons, subject to stated exceptions.
- Taxon
- ONION
Allium cepat0 - Treatment
- 50% of potassium fertilizer at 30 DAT and 50% at 60 DATe0
- Outcome
- Plant height, bulbing ratio, plant fresh weighte0
- Direction
- maximume0
- Qualifier
- except for plant height at 120 DAT in the first season and bulbing ratio at 90 DAT in both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, bulbing ratio, plant fresh weight and plant dry weight recorded maximum mean values by adding 50% of potassium fertilizer at 30 DAT and 50% at 60 DAT at two growth stages in both seasons, except for plant height at 120 DAT in the first season and bulbing ratio at 90 DAT in both seasons.”
t0“ONION”
Claim · model-written summary
The same potassium timing maximized dry weight.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium fertilizer at 30 DAT and 50% at 60 DATe0
- Outcome
- plant dry weighte0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant dry weight recorded maximum mean values by adding 50% of potassium fertilizer at 30 DAT and 50% at 60 DAT”
t0“ONION”
Claim · model-written summary
The 30 and 60 DAT potassium split gave the highest bulb weight, marketable yield and culls yield.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium at 30 DAT and 50% at 60 DATe0
- Outcome
- bulb weight, marketable yield/fed., culls yield/fed.e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding 50% of potassium at 30 DAT and 50% at 60 DAT attained the highest average of bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed.”
t0“ONION”
Claim · model-written summary
The 30 and 60 DAT potassium split gave the highest total yield.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium at 30 DAT and 50% at 60 DATe0
- Outcome
- total yield/fed.e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding 50% of potassium at 30 DAT and 50% at 60 DAT attained the highest average of bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed.”
t0“ONION”
Claim · model-written summary
The before-transplanting and 60 DAT potassium split produced the lowest yield measures in both seasons.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium before transplanting and 50% at 60 DATe0
- Outcome
- bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed.e1
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adding 50% of potassium before transplanting and 50% at 60 DAT attained the lowest ones in both seasons.”
e1“highest average of bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed.”
t0“ONION”
Claim · model-written summary
Raising foliar urea from 2 to 4 or 6 g/l significantly increased height and fresh and dry weight at both growth stages.
- Taxon
- ONIONAllium cepat0
- Treatment
- urea rate as foliar spray from 2 to 4 or 6 g/le0
- Outcome
- plant height, plant fresh weight and plant dry weighte0
- Direction
- increasede0
- Comparator
- 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing urea rate as foliar spray from 2 to 4 or 6 g/l significantly increased mean values of plant height, plant fresh weight and plant dry weight at two growth stages, in both seasons.”
t0“ONION”
Claim · model-written summary
Foliar urea at 6 g/l gave greater bulb weight and yield measures; 2 g/l gave the lowest values with a culls yield exception.
- Taxon
- onionAllium cepae0
- Treatment
- 6 g/l of ureae0
- Outcome
- bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed.e0
- Direction
- loweste0
- Qualifier
- except for culls yield/fed. in the second seasone0
- Comparator
- 2 g/le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying onion plants with 6 g/l of urea attained of average bulb weight, marketable yield/fed., culls yield/fed. and total yield/fed. While spraying onion plants with 2 g/l gave lowest ones of all studied characters, except for culls yield/fed. in the second season.”
Claim · model-written summary
The before-transplanting and 60 DAT potassium split gave the highest TSS and dry matter percentages.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium before transplanting and 50% at 60 DATe0
- Outcome
- TSS% and dry matter%e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest percentages of TSS% and dry matter% were obtained by adding 50% of potassium before transplanting and 50% at 60 DAT”
t0“ONION”
Claim · model-written summary
The 30 and 60 DAT potassium split gave the smallest TSS and dry matter percentages.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium at 30 DAT and 50% at 60 DATe0
- Outcome
- TSS% and dry matter%e1
- Direction
- smalleste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the smallest ones were obtained by adding 50% of potassium at 30 DAT and 50% at 60 DAT”
e1“TSS% and dry matter%”
t0“ONION”
Claim · model-written summary
Increasing foliar urea from 2 to 4 or 6 g/l decreased TSS and dry matter percentages.
- Taxon
- ONIONAllium cepat0
- Treatment
- urea as foliar spray rate from 2 g/l to 4 or 6 g/le0
- Outcome
- TSS% and dry matter %e0
- Direction
- decreasede0
- Comparator
- 2 g/le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing urea as foliar spray rate from 2 g/l to 4 or 6 g/l decreased mean values of TSS% and dry matter % in both seasons.”
t0“ONION”
Claim · model-written summary
The 30 and 60 DAT potassium split plus 6 g/l urea gave the highest bulb weight and marketable and total yields.
- Taxon
- ONIONAllium cepat0
- Treatment
- 50% of potassium at 30 DAT and 50% at 60 DAT when plants were sprayed with 6 g/l of ureae0
- Outcome
- bulb weight, marketable yield/fed. and total yield/fed.e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest average of bulb weight, marketable yield/fed. and total yield/fed. were achieved by adding 50% of potassium at 30 DAT and 50% at 60 DAT when plants were sprayed with 6 g/l of urea”
t0“ONION”
Claim · model-written summary
The authors recommend the 30 and 60 DAT potassium split with 6 g/l foliar urea for optimum onion yield.
- Taxon
- onionAllium cepae0
- Treatment
- 50% of potassium at 30 DAT and 50% at 60 DAT and spraying onion plants with 6 g/l of ureae0
- Outcome
- optimum onion yield per unit areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adding 50% of potassium at 30 DAT and 50% at 60 DAT and spraying onion plants with 6 g/l of urea.could be recommended for optimum onion yield per unit area.”
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See all 71 papers →8 of 14 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.