Tolerance of Virginia-Type Peanut to Different Application Timings of 2,4-DB

2002 ◽  
Vol 29 (2) ◽  
pp. 126-128 ◽  
Author(s):  
T. A. Baughman ◽  
W. J. Grichar ◽  
D. L. Jordan
Keyword(s):  
North Carolina ◽  
Seed Weight ◽  
Field Studies ◽  
Market Quality

Abstract Field studies were conducted to determine the effects of 2,4-DB application timings on yield and market quality of virginia-type peanut. Trials were conducted at three locations in Texas and one location in North Carolina in 1997, 1998, and 1999. 2,4-DB at 0.45 kg ae/ha was applied 30, 45, 60, 90, and 120 d after planting (DAP). Additional timings included combinations of 30 DAP followed by (fb) 60, 90, or 120 DAP; 60 DAP fb 90 or 120 DAP; and 90 DAP fb 120 DAP. Peanut yield, market grade factors, and pod and seed weight were not influenced by various application timings of 2,4-DB.

Response of LibertyLink and WideStrike Cotton to Varying Rates of Glufosinate

2015 ◽  
Vol 29 (4) ◽  
pp. 665-674 ◽  
Author(s):  
Darrin M. Dodds ◽  
Christopher L. Main ◽  
L. Thomas Barber ◽  
Charles Burmester ◽  
Guy D. Collins ◽  
...  
Keyword(s):  
North Carolina ◽  
Growth Parameters ◽  
Fiber Quality ◽  
Field Studies ◽  
Application Rate ◽  
Yield Reduction ◽  
Single Application ◽  
Application Rates ◽  
Growth Development

Field studies were conducted in Alabama, Arkansas, Georgia, Louisiana, Mississippi, North Carolina, and Tennessee during 2010 and 2011 to determine the effect of glufosinate application rate on LibertyLink and WideStrike cotton. Glufosinate was applied in a single application (three-leaf cotton) or sequential application (three-leaf followed by eight-leaf cotton) at 0.6, 1.2, 1.8, and 2.4 kg ai ha−1. Glufosinate application rate did not affect visual injury or growth parameters measured in LibertyLink cotton. No differences in LibertyLink cotton yield were observed because of glufosinate application rate; however, LibertyLink cotton treated with glufosinate yielded slightly more cotton than the nontreated check. Visual estimates of injury to WideStrike cotton increased with each increase in glufosinate application rate. However, the injury was transient, and by 28 d after the eight-leaf application, no differences in injury were observed. WideStrike cotton growth was adversely affected during the growing season following glufosinate application at rates of 1.2 kg ha−1 and greater; however, cotton height and total nodes were unaffected by glufosinate application rate at the end of the season. WideStrike cotton maturity was delayed, and yields were reduced following glufosinate application at rates of 1.2 kg ha−1 and above. Fiber quality of LibertyLink and WideStrike cotton was unaffected by glufosinate application rate. These data indicate that glufosinate may be applied to WideStrike cotton at rates of 0.6 kg ha−1 without inhibiting cotton growth, development, or yield. Given the lack of injury or yield reduction following glufosinate application to LibertyLink cotton, these cultivars possess robust resistance to glufosinate. Growers are urged to be cautious when increasing glufosinate application rates to increase control of glyphosate-resistant Palmer amaranth in WideStrike cotton. However, glufosinate application rates may be increased to maximum labeled rates when making applications to LibertyLink cotton without fear of reducing cotton growth, development, or yield.

scholarly journals Growth Regulator Effects on the Market Quality of Five Virginia-Type Peanut Cultivars1

1984 ◽  
Vol 11 (2) ◽  
pp. 64-66 ◽  
Author(s):  
R. W. Mozingo ◽  
J. L. Steele
Keyword(s):  
North Carolina ◽  
Succinic Acid ◽  
Arachis Hypogaea ◽  
Growth Regulator ◽  
Market Quality ◽  
Arachis Hypogaea L ◽  
Production Practice ◽  
Peanut Production ◽  
Grade Yield

Abstract The growth regulator succinic acid 2, 2-dimethylhydrazide (SADH) was applied to the foliage of five virginia-type peanut (Arachis hypogaea L.) cultivars in 1980, 1981, and 1982 in Martin County, North Carolina, and Suffolk, Virginia. Treated and untreated peanuts at each location were harvested on two dates each year. Market grade, yield, and value/ha evaluations were made on the cultivars Florigiant, NC 6, NC 7, VA 81B, and NC 8C. Yield and value/ha within each cultivar were statistically different across years and locations. The growth regulator significantly reduced the percentage of fancy pods for all cultivars except VA 81B while significantly increasing the percentage of extra large kernels for all cultivars except NC 8C. The percentage of total kernels was not affected with Florigiant or NC 7, but significant reductions were observed with growth regulator application to NC 6, VA 81B, and NC 8C. The yield and value/ha of Florigiant and NC 6 increased significantly with growth regulator applications. Yield/ha of NC 7 increased with growth regulator application but was not statistically different; however, the NC 7 value/ha increased significantly. Growth regulator applications on NC 8C and VA 81B affected neither yield nor value/ha. Thus, applications of the growth regulator SADH can be a beneficial peanut production practice for some cultivars; however, the response within cultivars was inconsistent across years and locations.

Yield and Seed quality of barley (Hordeum vulgare L.) as affected by variety, nitrogen level and harvesting time

2014 ◽  
Vol 2 (2) ◽  
pp. 93-100
Author(s):  
Shahnaj Yesmina ◽  
Moushumi Akhtarb ◽  
Belal Hossain
Keyword(s):  
Grain Yield ◽  
Seed Weight ◽  
Seed Quality ◽  
Quality Parameters ◽  
Nitrogen Level ◽  
Yield Attributes ◽  
Harvesting Time ◽  
Nitrogen Levels ◽  
Vigour Index

The experiment was conducted to find out the effect of variety, nitrogen level and harvesting time on yield and seed quality of barley. The treatments used in the experiment consisted of two varieties viz. BARI Barley 4 and BARI Barley 5, three harvesting time viz. 35, 40 and 45 Days after Anthesis (DAA) and nitrogen levels viz. 0, 70, 85 and 100 kg N ha-1 . The experiment was laid out in a spilt- spilt-plot design with three replications assigning the variety to the main plot, harvesting time to the sub-plots and nitrogen level to the sub-sub plots. Variety had significant effects on the all yield attributes except fertile seeds spike-1 . Seed quality parameters viz. normal seeds spike-1 , deformed seeds spike-1 , germination (%) and vigour index were statistically significant. The variety BARI Barley 5 produced higher grain yield and seed quality than BARI Barley 4. Grain yield from BARI Barley 5 and BARI Barley 4 were 4.59 t ha-1 and 4.24 t ha-1 , respectively. Significantly, the highest 1000-seed weight (46.90 g) was produced by BARI Barley 5 than (37.90 g) BARI Barley 4. The result revealed that harvesting time had significant effect on yield and yield attributes and seed quality parameters. Seed yield was highest (4.65 t ha-1 ) when the crop harvested at 40 DAA and it was increased linearly from 35 DAA. Maximum quality seed and 1000-seed weight (43.20 g) was obtained when the crop harvested at 40 DAA. All the yields, yield attributes and seed quality parameters were significantly influenced by nitrogen levels. The highest grain yield (5.14 t ha-1 ) was obtained when BARI Barley 5 variety was fertilized by 100 kg N ha-1 and the lowest (3.14 t ha-1 ) was obtained from control treatments. Normal seeds spike-1 , vigour index, germination (%) were better at 85 kg N ha-1 in variety of BARI Barley 5 than BARI Barley 4. So it can be concluded that BARI Barley 5 showed better result when fertilized with 100 kg N ha-1 and harvested at 40 DAA for getting maximum yield and 85 kg N ha-1 and harvested at 40 DAA for getting better quality seed.

Operations Research on the Female Village-Based Family Planning Worker Program of Pakistan

1998 ◽  
Vol 18 (3) ◽  
pp. 283-305
Author(s):  
Louisiana Lush ◽  
George P. Cernada ◽  
A. K. Ubaidur Rob ◽  
Mohammed Shafiq Arif ◽  
Minhaj Ul Haque ◽  
...  
Keyword(s):  
Family Planning ◽  
Operations Research ◽  
Technical Assistance ◽  
Field Studies ◽  
Family Planning Services ◽  
Training And Supervision ◽  
The Government ◽  
And Training ◽  
Broad Program

This article presents the results of a number of operations research studies (OR) of family planning services provided by a new cadre of female village-based family planning workers in Punjab Province, Pakistan. This cadre of workers, recruited nationwide, have been trained to visit women in their villages to provide information and family planning services. The studies were conducted as part of a broad program of technical assistance to the Government of Pakistan. Surveys investigated the quality of their training as well as attitudes among clients to the new program. They found that the program is developing well but there is room for improvement, particularly in counseling and training. Additional field studies are ongoing and recommendations for change have been incorporated in training and supervision. The program is expanding on a national scale.

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