Effects of Cycocel on Lodging and Grain Yield of Upland and Swamp Rice in Sierra Leone

1971 ◽  
Vol 7 (2) ◽  
pp. 157-160 ◽  
Author(s):  
D. K. Das Gupta
Keyword(s):  
Grain Yield ◽  
Sierra Leone ◽  
Upland Rice ◽  
Foliar Spray ◽  
The Other ◽  
Rice Seed ◽  
Other Hand

SUMMARYIn upland rice, seed soaked in CCC for 24 hours before sowing or sprayed with CCC 10, 21, 42 and 63 days after sowing, showed severe lodging. Effects of CCC on the number of paniclebearing tillers, number of good grains in 1000 grains, weight of 100 good grains and grain yield were not significant. On the other hand CCC prevented lodging in swamp rice, with the lowest percentage when foliar spray was given 21 days after transplanting. CCC failed to increase the number of panicle-bearing tillers and grain yield in swamp rice.

scholarly journals Effect of seed treatment and foliar spray with fungicides in controlling black point disease of wheat

1970 ◽  
Vol 34 (3) ◽  
pp. 425-434 ◽  
Author(s):  
PK Malaker ◽  
IH Mian
Keyword(s):  
Economic Analysis ◽  
Grain Yield ◽  
Key Words ◽  
Seed Weight ◽  
Seed Treatment ◽  
Foliar Spray ◽  
The Other ◽  
Gross Margin ◽  
Black Point ◽  
Wheat Seeds

The efficacy of seed treatment and foliar spray with fungicides in controlling black point incidence of wheat seeds was evaluated in the field. Two seed treating fungicides, namely Vitavax-200 and Homai-80WP were used @ 0.25% of dry seed weight and foliar spray with Tilt-250EC (0.05%) was applied in six different schedules. Untreated and unsprayed controls were also maintained. Seed treatment with either Vitavax-200 or Homai-80WP significantly increased plant population and grain yield, but none of them was found effective in reducing black point incidence. On the other hand, foliar sprays with Tilt-250EC under all the spray schedules except spraying at 70 and 90 DAS significantly minimized the disease severity over unsprayed control. Among the different spray schedules, spraying at 30, 40, 50, 60, 70, 80, and 90 DAS appeared to be most effective, which was similar to spraying at 30, 45, 60, 75, and 90 DAS in reducing black point incidence and increasing grain yield. Economic analysis on yield advantage showed that the highest additional gross margin of Tk. 6120/ha with BCR 2.57 was obtained from five sprays applied at 30, 45, 60, 75, and 90 DAS. Key Words: Seed treatment, foliar spray, black point, wheat. DOI: 10.3329/bjar.v34i3.3968 Bangladesh J. Agril. Res. 34(3) : 425-434, September 2009

scholarly journals Different soaking times and niacin concentrations affect yield of upland rice under water deficit conditions

2019 ◽  
Vol 37 (2) ◽  
pp. 166-172
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Aliny Heloísa Alcântara Rodrigues ◽  
Sávio Rosa Correa ◽  
Alexander Seleguini ◽  
Sebastião Ferreira de Lima
Keyword(s):  
Grain Yield ◽  
Water Deficit ◽  
Plant Development ◽  
Maximum Concentration ◽  
Upland Rice ◽  
Seedling Emergence ◽  
Rice Seed ◽  
Relative Index ◽  
Spikelets Per Panicle ◽  
Production Characteristics

Rice is an important source of energy for a large part of the world’s population. The development and application of technologies that contribute to the improvement of production forthis grain have great importance. The objective of this study was to evaluate the influence of rice seed immersion in a niacin solution on plant development, physiology and production. Thetreatments were defined by a combination of two immersion times for the seeds (12 h and 24 h) in four niacin concentrations (0.00, 100, 200 and 300 mg L-1) distributed in five replicates. Characteristics relating to seedling emergence, plant vegetativedevelopment, relative indices of chlorophyll and grain yield were evaluated. We verified that the immersion of the seeds for 12 h gave higher relative indices of chlorophyll, whereas immersion for 24 h increased the speed of emergence and the number of tillers and panicles. The doses of niacin positively affected the relative chlorophyll indices and the production characteristics, up to a maximum concentration of 172.57 mg L-1. We concluded that the immersion of rice seeds for 24 h increased the speed of seedling emergence, leaf number, and panicles per area. However, the relative indices of chlorophyll in leaves decreased. The use of niacin promoted the numbers of spikelets per panicle, fertility of the spikelets and the weight of 1000 grains, besides increasing the relative index of chlorophyll in the leaves of rice plants.

Hybrid court resilience and the selection of cases

2020 ◽  
Vol 33 (4) ◽  
pp. 1029-1046
Author(s):  
Michail Vagias
Keyword(s):  
Sierra Leone ◽  
External Pressure ◽  
The Other ◽  
Context Sensitive ◽  
Case Selection ◽  
Other Hand ◽  
Scope Of Application ◽  
National Reconciliation ◽  
Over Time ◽  
Selection Of

AbstractThe article explores the extent to which the resilience of hybrid courts is impacted by their selection of cases. It proceeds from the observation that the cases pursued by hybrid institutions are the result of choice under constraints. The article examines the identity of the case-choosers and the relevance of such choices for the internal and external resilience of hybrid courts. The research reveals the need to distinguish between case selection by the drafters and case selection by court authorities in the context of each institution and the tensions between these two sets of practices. These tensions are examined in the context of four hybrid institutions. The Office of the Prosecutor at the Special Court for Sierra Leone enjoyed a relatively broad measure of discretion in terms of case selection. However, the Extraordinary African Chambers, the Cambodia Chambers and the Kosovo Specialist Chambers seem to have been established with specific accused in mind. The article argues that resilience considerations are probably relevant in instances of case selection by the court officers, albeit they are context sensitive and may vary over time. Case selection prior to the establishment of a court and/or by political stakeholders, on the other hand, is ill-suited for analysis using internal resilience and arguably fall outside its scope of application. For these cases, the research argues that the discussion requires re-orientation with emphasis shifted to concepts such as contribution to national reconciliation as opposed to resistance to external pressure.

How Ancient is West African Maize?

Africa ◽  
1963 ◽  
Vol 33 (2) ◽  
pp. 115-131 ◽  
Author(s):  
M. D. W. Jeffreys
Keyword(s):  
West Africa ◽  
Sierra Leone ◽  
West African ◽  
The Other ◽  
Vernacular Names ◽  
Western Africa ◽  
Other Hand

Eastern Whites in Western AfricaMy article on Zaburro was written in the expectation that it would stimulate discussion over the antiquity of maize in West Africa, and the matter has been taken up by Professor Portères (1959), on whose publication Mr. Willett has relied for certain inferences in his article in Africa for January 1962. Among the interesting points brought forward by Professor Portères (1959, vi) are the groups of African vernacular names which indicate that maize was introduced by foreigners, strangers, whitemen. A similar observation had been made more than a hundred years ago by Koelle (a. 1854, v), a missionary in Sierra Leone, who wrote: ‘…the names for onion, rice, maize, &c. show that in many countries [in Africa] these articles have been introduced by foreigners.…’ Who these foreigners were Koelle, with his long list of vernacular words for whiteman to choose from, leaves indeterminate. On the other hand, underlying Professor Portères's view that it was the Portuguese or the Dutch who brought maize to the Guynee coast, lies the assumption that the foreigners, the strangers, the whitemen indicated by these vernacular names were the Portuguese and the Dutch.

scholarly journals Effect of spacing on the performance of newly developed Aus rice Var. Binadhan-19

2020 ◽  
Vol 6 (3) ◽  
pp. 373-378
Author(s):  
Md Robiul Islam Akondo ◽  
Md Belal Hossain
Keyword(s):  
Experimental Design ◽  
Grain Yield ◽  
Plant Height ◽  
Root Length ◽  
Harvest Index ◽  
The Other ◽  
Root Weight ◽  
Panicle Length ◽  
Straw Yield ◽  
Other Hand

An experiment was conducted at the experimental farm of BINA Sub-station, Gopalganj to determine the effect of spacing on the yield and yield attributing parameters of rice. Four spacings viz. 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were included in the study. The experimental design was a randomized completely block with three replications. Spacing’s 15 cm × 15 cm, 20 cm × 15 cm, 20 cm × 20 cm and 25 cm × 20 cm were adopted 49, 42, 36 and 30 hills per square meter, respectively. Results revealed that different spacing performed significantly differed yield contributing characters (plant height, panicle length, number of effective and non-effective tillers, number of filled and unfilled grain, grain and straw yield of rice. Results indicated that the highest plant height (83.40 cm), panicle length (19.73), number of effective tillers per hill (11.00), number of total grains per panicle (87.73), number of filled grains per panicle (70.53), root length (16.07 cm), root weight (38.00 g per five plants), harvest index (38%), grain yield (4.19 t ha-1) and straw yield (4.50 t ha-1) were found with 25 cm × 20 cm spacing. On the other hand, maximum number of non-effective tillers per hill (1.60) was found in 15 cm × 15 cm spacing. Results of the present study revealed that 25 cm × 20 cm spacing was found to be the best for obtaining maximum grain yield of aus var. Binadhan-19. Res. Agric., Livest. Fish.6(3): 373-378, December 2019

scholarly journals EXOGENOUS APPLICATION OF VITAMINS IN UPLAND RICE

2019 ◽  
Vol 6 (2) ◽  
pp. 1-6
Author(s):  
Eduardo Pradi Vendruscolo ◽  
Aliny Heloísa Alcântara Rodrigues ◽  
Paulo Ricardo Oliveira ◽  
Rodrigo Andrade Leitão ◽  
Luiz Fernandes Cardoso Campos ◽  
...  
Keyword(s):  
Beneficial Effect ◽  
Grain Yield ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
Foliar Spray ◽  
Rice Crop ◽  
Exogenous Application ◽  
Rice Plants ◽  
Seed Soaking

Vitamin application can optimize plant growth and grain yield of rice crop due to its beneficial effect on many plant physiological characteristics. The present study was conducted to evaluate the effects of niacin and thiamin applied as seed soaking or foliar spray on the morphological and productive characteristics of upland rice crop (Oryza sativa L., cv. Primavera), grown under greenhouse conditions. The experiment was arranged in a randomized block design in a 4 x 2 factorial scheme, with four replicates. The treatments consisted of the application of vitamins (control; 200 mg L-1 thiamin; 200 mg L-1 niacin; and 100 mg L-1 thiamin + 100 mg L-1 niacin) and two application methods (seed soaking and foliar spraying). Morphological and productive characteristics of the rice plants were evaluated. The exogenous application of thiamin and niacin, regardless of the application method, has a beneficial effect on the growth of upland rice plants, but does not increase the grain yield of the crop.

scholarly journals Crossing rate and distance in upland rice

Bragantia ◽  
2005 ◽  
Vol 64 (2) ◽  
pp. 197-201 ◽  
Author(s):  
Edson Ferreira da Silva ◽  
Lucielio Manoel da Silva ◽  
Ricardo Montalván
Keyword(s):  
Oryza Sativa ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
The State ◽  
The Other ◽  
Rice Cultivars ◽  
Other Hand ◽  
Autogamous Species ◽  
Four Blocks ◽  
Natural Crossing

Rice (Oryza sativa L.) is an autogamous species that shows natural crossing rates of up to 3%, where the variations are influenced by genotypes and environments. The present work aimed to evaluate the rates and distances of natural crossing between the upland rice cultivars Guarani and IAC 201. The study was done in the counties of Carpina and Recife, in the State of Pernambuco during the agricultural years of 2001 and 2002, respectively. The Guarani cultivar presents leaf pilosity conditioned by the dominant alleles HLHL and this character was used as a morphologic tracer. On the other hand, the IAC 201 cultivar does not show pilosity because it carries the recessive alleles (hlhl). The experiments were composed of four blocks, constituting of ten circunscribed rows of the cultivar under study, spaced 50 cm between themselves, and in the center of each block the Guarani cultivar was planted. The natural crossing rate and distance were evaluated in the plants resulting from the seeds of the IAC 201 cultivar from natural crossing, expressing pilosity in the leaves. After the evaluation of the plants arising from the first two rows of the experiment carried out in Carpina and the first three rows of the experiment done in Recife, it was concluded that in the first row (0.5 m) there were plants resulting from natural crossing. At this distance, the average crossing rate in Carpina was 0.30% while that in Recife was 0.35%.

scholarly journals Production of Triticale Genotypes in Two Salt Affected Areas of Bangladesh for Grain and Fodder

1970 ◽  
Vol 8 (2) ◽  
pp. 1-7
Author(s):  
M Yusuf Ali ◽  
SM Zaman ◽  
M Amin ◽  
MR Amin ◽  
Shamima Aktar
Keyword(s):  
Grain Yield ◽  
Soil Salinity ◽  
Growth And Development ◽  
Sowing Date ◽  
The Other ◽  
Toxic Effects ◽  
Crop Failure ◽  
Other Hand ◽  
Green Fodder ◽  
Fodder Yield

Fifteen genotypes of Triticale were tested in two salt affected locations namely Satkhira and Noakhali during 2006-07. At Satkhira, genotype E6 and E14 produced significantly the highest grain yield (2.00 t/ha) from December 28 sowing date. While the highest fodder yield was obtained from line E7 (6.94 t/ha). However, E6 produced good amount of green fodder (5.62 t/ha) as well as the highest grain yield (2.00 t/ha), so, genotype E6 could be used for dual purposes. On the other hand, at Noakhali genotype E5 gave the highest grain yield (2.48 t/ha) which was statistically similar to E11. However, E11 produced the highest amount of green fodder (9.88 t/ha). Hence, E11 could be used for the dual purposes. In both locations it was observed that soil salinity above 6-7 dS/m hampered the growth and development of the crop. To reduce the toxic effects of salinity on seeds, irrigation would be advisable just after sowing. Crop failure was observed when soil salinity was above 10 dS/m. Keywords: Triticale genotypes; salinity; grain; fodder. DOI: 10.3329/agric.v8i2.7570 The Agriculturists 8(2): 1-7(2010)

A Reconsideration of the Mane Invasions of Sierra Leone

1967 ◽  
Vol 8 (2) ◽  
pp. 219-246 ◽  
Author(s):  
Walter Rodney
Keyword(s):  
Sixteenth Century ◽  
Sierra Leone ◽  
The Other ◽  
Ruling Class ◽  
Secret Societies ◽  
Social Patterns ◽  
The Third ◽  
Other Hand ◽  
Principal Elements ◽  
Southern Section

As a contribution to an already considerable historiography, it is suggested here that the Mane invaders of Sierra Leone comprised two principal elements —a ruling élite originating in the southern section of the Mande world of the Western Sudan, and numerical forces drawn from the area around Cape Mount. The first stage of movement took place in the first half of the sixteenth century, carrying Mande clans to the Liberian coast from the region around Beyla and perhaps even from the hinterland of modem Ghana. There then followed a number of incursions into Sierra Leone during the third quarter of the sixteenth century.A new ruling class was established in Sierra Leone and adjacent regions, bringing increased exploitation and causing the destruction of the indigenous ivory-carving skills. On the other hand, the Manes brought improved military techniques and advances in the manufacture of iron and cloth. They also profoundly influenced religious and social patterns, particularly with respect to the secret societies of the area.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

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