scholarly journals Efficacy of harvest-aid defoliants on yield of seed cotton (Gossypium hirsutum L.)

2018 ◽  
Vol 44 (3) ◽  
pp. 483-488
Author(s):  
Kulvir Singh ◽  
Pankaj Rathore
Keyword(s):  
Gossypium Hirsutum ◽  
Field Experiments ◽  
Seed Cotton ◽  
Gossypium Hirsutum L ◽  
Time Of Application ◽  
Application Rates ◽  
Use Efficiency ◽  
Harvest Aid ◽  
Vegetative And Reproductive Growth ◽  
Benefit Cost

Field experiments were conducted to determine the effect of different harvest-aid defoliants, their application rates and time of application [140 and 150 days after sowing (DAS)] on yield of seed cotton (Gossypium hirsutum L.). MRC7361BGII (3171.8 kg/ha) and MRC7017BGII (3083.3 kg/ha) produced significantly higher yield as compared to F1861 (2454.9 kg/ha). Improved water and fertilizer use efficiency coupled with better Benefit: Cost (B : C) ratio for Dropp ultra 200 ml/ha at 150 DAS clearly indicated its superiority over other treatments. Dropp ultra showed potential to improve yield besides promoting crop earliness while keeping vegetative and reproductive growth in harmony.

scholarly journals Potassium impact on nitrogen use efficiency in potato – a case study from the Central-East Europe

2017 ◽  
Vol 63 (No. 9) ◽  
pp. 422-427 ◽  
Author(s):  
GRZEBISZ Witold ◽  
ČERMÁK Pavel ◽  
RROCO Evan ◽  
SZCZEPANIAK Witold ◽  
POTARZYCKI Jarosław ◽  
...  
Keyword(s):  
Field Experiments ◽  
Climatic Conditions ◽  
Potato Yield ◽  
Nitrogen Efficiency ◽  
East Europe ◽  
Application Management ◽  
Application Rates ◽  
Potassium Efficiency ◽  
Use Efficiency

Potato yield is affected by an interaction between nitrogen (N) and potassium (K) supply. This hypothesis was verified in a series of field experiments conducted during 2010–2013 in Albania (AL), Czech Republic (CZ) and Poland (PL). The two-factorial experiment was founded on relative scales of K (0, 50, 100, and 150%), and N application rates (75% and 100%) of the recommended doses, which were country-specific. The average tuber yield was doubled for AL, increased by 50% for PL, and by 15% for the CZ in response to K and N interaction. These differences are caused by an increase in the apparent nitrogen efficiency (ANE), which rose significantly by the progressive Krates. Maximum average ANE of 90 kg tubers/kg N was recorded in AL; it was 2-fold lower in CZ. Top average apparent potassium efficiency (AKE) of 65 kg tubers/kg K was recorded in PL; it was 4-times lower in CZ. The relationships between AKE and ANE clearly demonstrate the tight interaction between the N and K, and its effects on potato yield. However, a sound K application management should be adjusted to the local edaphic and climatic conditions.

Effects of Chlorimuron Applied Postemergence to Cotton (Gossypium hirsutum)

1990 ◽  
Vol 4 (2) ◽  
pp. 314-317 ◽  
Author(s):  
Michael G. Patterson ◽  
C. Dale Monks ◽  
Thomas Rayburn ◽  
Glenn Wehtje
Keyword(s):  
Plant Growth ◽  
Gossypium Hirsutum ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth Stage ◽  
Seed Cotton ◽  
Full Bloom ◽  
Time Of Application

Chlorimuron applied postemergence at 2.2, 4.4, 8.8, 18, and 35 g ai/ha to cotton at either the 4-leaf, pinhead-square, first-bloom, or full-bloom growth stage was evaluated for potential as a plant growth regulator. Chlorimuron did not reduce bolls per plant at any rate or time of application, but the proportion of open to closed bolls decreased as rate increased. Seed cotton yields decreased with increasing chlorimuron rate and cotton age. The use of chlorimuron as a plant growth regulator for cotton appears limited.

Effect of cycocel on the growth, abscission and yield of cotton (Gossypium hirsutum L.)

1980 ◽  
Vol 94 (2) ◽  
pp. 489-491
Author(s):  
G. S. Dhillon ◽  
D. S. Kler ◽  
Des Raj
Keyword(s):  
Environmental Factors ◽  
Gossypium Hirsutum ◽  
Cotton Yield ◽  
Crop Canopy ◽  
Seed Cotton ◽  
Flower Buds ◽  
Gossypium Hirsutum L ◽  
Seed Cotton Yield

A large number of flower buds, flowers and premature bolls of cotton are shed without contributing to seed-cotton yield. Abscission may be affected by environmental factors. It may, therefore, be possible to reduce it by modifying the micro-environment within the crop canopy.

Ammonia volatilization following surface-applied pig and cattle slurry in France

1995 ◽  
Vol 125 (2) ◽  
pp. 245-252 ◽  
Author(s):  
J.-F. Moal ◽  
J. Martinez ◽  
F. Guiziou ◽  
C.-M. Coste
Keyword(s):  
Field Experiments ◽  
Arable Land ◽  
Matter Content ◽  
Total Loss ◽  
Dry Matter Content ◽  
Pig Slurry ◽  
Ammoniacal Nitrogen ◽  
Cattle Slurry ◽  
Time Of Application ◽  
Application Rates

SUMMARYField experiments were carried out in Brittany (Western France) in 1993 to measure ammonia losses from surface-applied pig and cattle slurry. Experiments were conducted on grass, stubble (wheat and maize) and arable land using a wind tunnel system. Ammonia losses were followed during periods ranging from 20 to 96 h after slurry application. Rates of slurry applied varied from 40 to 200 m3/ha. In two experiments, losses from cattle slurry were respectively 75 and 54% of the ammoniacal nitrogen applied in the slurry. Ammonia emissions from pig slurry applied at a rate of 40 m3/ha, during spring and summer experiments, were higher on grass (45–63% of the total ammoniacal nitrogen applied) than on wheat stubble (37–45%). On average, 75% of the total loss in all experiments occurred within the first 15 h after spreading. Significant correlations were found between ammonia losses (kg N/ha) and mean soil temperature and slurry dry matter content (%) using simple linear regressions and stepwise procedures. The time of application was also found to influence the magnitude of ammonia loss: 83% of the total loss occurred within 6 h when the slurry was applied at midday compared with 42% when it was applied in the evening.

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