الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
SUMMARY
EVALUAnON OF SOME METHODS OF COTTON PLANTING IN
RELA nON TO THEIR EFFECT ON YIELD AND
QUALITY
Two field experiments were carried out during 1986 and
1987 seasons at Bahtim Agricultural Research Station, Agricultural
Research Center.
The aim of the experiments was to study the effect of different
planting methods and nitrogen fertilizer levels on growth, yield
and fiber properties of cotton cultivar Giza 75, a medium long stable
cotton.
Each experiment included 18 treatments which were the
combination of 6 planting methods and 3 N levels.
Planting methods were :
Planting seedlings of 30, 40 and 50 days old, mechanical
planting at spacing of 60 cm between rows and 20 cm between hiJJs,
planting by hand on both sides of ridges 120 cm width and normal
planting by hand on the southern side of the ridges 60 cm in width
in hills 20 cm apart.
The N levels were: 25, 50 and 75 kg N/fed.
A split plot design was used with 4 replications. The main
plots were devoted to methods of planting and sub-plots to N levels.
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The normal cultural practices were followed. Data on growth,
yield components, yield, and fiber properties were recorded.
Results could be summarized as follows:
I. Effect of planting methods :
1. Plant height at picking time was significantly affected by
planting methods in both seasons. Mechanical planting produced
the tallest plants in the first season, and transplanting 40
days aged seedlings produced maximum plant height in the
second season.
2. Number of fruiting branches was significantly affected by
planting methods only in the second season where the greatest
number of fruiting branches was produced by normal planting
and the lowest number by transplanting 50 days old seedlings.
Also in the second season node number of first sympodia
was the highest under normal- planting and the lowest under
transplanting 30 days aged seedlings.
3. Days to first flower appearance as well as to first boll opening
were significantly affected by planting methods. Earlier
flowering and boll opening were obtained by mechanical
and normal planting and delayed flowering and boll opening
were realized by transplanting 50 days old seedlings.
4. Number of total bolls/plant was significantly affected by
planting methods only in the first season where transplanting
30 days old seedlings produced the highest boll number.
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5. Number of open bolls/plant was significantly affected by
planting methods where the highest open boll number was
obtained by planting on both sides of the ridge in both seasons
and the lowest number by transplanting 50 days old seedlings.
6. Boll weight was significantly affected by planting methods
In the second season where the heaviest bolls were produced
by normal planting and the lightest bolls by transplanting
50 days old seedlings.
7. Seed cotton yield per plant was significantly affected by
planting methods in both seasons. Growing cotton on both
sides of the ridge in the first season and transplanting 30
days old seedlings in the second season-produced the highest
yield/plant.
8. Lint percentage was significantly higher under normal planting
in the first season arid under mechanical planting in the
second one. The lowest lint percentage was obtained by
tranplanting 50 days old seedlings.
9. Seed index was not affected by planting methods in both
seasons.
10. Percentage of surviving hiUs was significantly higher under
normal planting in the first season (96 96) and under mechanical
t
planting (95.6 96) in the second one. Lower percentages were
recorded when seedling of 50 days old were used. Plant
stand at picking foHowed a similar trend.
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11. Seed cotton yield as well as lint yield per fed. were significantly
affected by planting methods in both seasons. The highest
seed cotton yield was produced by normal planting in both
seasons and was 9.13 and 6.48 kentar/fed. in the first and
second season, respectively. The lowest seed cotton yield
was produced when 50 days old seedlings were transplanted,
where 3.76 and 2.51 kentar/fed. were obtained in 1986 and
1987J respectively.
The lint cotton yield followed a similar trend.
12. Normal planting produced higher percentage of the first
picking in both seasons, whereas transplanting aged seedlings
produced the lowest percentage of first picking.
13. In both seasons fiber strength was significantly higher with
normal cotton pJan~ compared with transplanting and mechanical
planting.
14. Fiber length as 2.5 % span length was significantly affected
by planting methods only in the second season. Mechanical
planting and early transplanting positively affected this
character. Span length at 50 % and uniformity ratio were
not affected by planting methods.
15. Fiber fineness was positively affected by transplanting, significant
differences in micronaire value were recorded in the
second season in favour of transplanting.
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II. Effect of’ Nitrogen Level:
L Plant height, number of, fruiting branches and node number
of first sympodium were not significantly affected by N
level in both seasons.
2. Days to first flower appearance and to first boll openmg
were greater at higher N level, indicating that higher N
rates delayed flowering and maturity.
3. Total number of bolls/plant was not affected by N level
in both seasons, whereas number of open bolls/plant was
increased at higher N levels in the second season.
4. Boll weight increased significantly as the N level increased
in the second season.
5. Seed cotton yield/plant increased significantly as the N level
increased only in the second season.
6. Neither lint percentage nor seed index were significantly
affected by N levels.
7. Plant stand at picking was higher at higher N level In 1987
season.
8. Seed cotton yield was significantly increased as a resuJt
of increasing N level in the second season. Raising the N
level from 25 to 50 and 75 kg N/fed. increased seed cotton
yield by 12 and 23 %, respectively in 1987 season. Lint cotton
yield followed a similar trend and increased by II and 20%,
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respecti vely.
9. Percentage of first picking was reduced due to the increase
in N level in both seasons.
10. Fiber strength was reduced as the N level increased in the
second season.
Fiber length expressed as 2.5 % span length decreased signficantly
in the second season as the N level increased.
11. Fiber length as 50 % span length, uniformity ratio and micronaire
values were not significantly affected by N level.
III. Interaction Effects :
1. Seed cotton yield per feddan was significantly affected by
the interaction planting method and N level in both seasons.
The highest seed cotton yield was 9.63 kentar/fed. in 1986
produced either through planting on both sides of the ridge
and 25 kg N/fed. or normal planting + 50 kg N/fed. In 1987
the highest yield was 6.95 kentar/fed. of normal planting
+ 75 kg N/fed.
2. Percentage of first picking was significantly affected by
the interaction in the second season. The highest percentage
of first picking was 78.7 % obtained by normal planting
with 50 kg N/fed.