Syzygium cumini (black plum).

2021 ◽  
Author(s):  
Nick Pasiecznik
Keyword(s):  
Arid Regions ◽  
Syzygium Cumini ◽  
Natural Distribution ◽  
Evergreen Tree ◽  
The Caribbean ◽  
The Tropics

Abstract S. cumini is a large evergreen tree 13 to 30 m tall. It is widely distributed in India, in all except the most arid regions, and its natural distribution probably includes Myanmar, Malaysia, Vietnam, Philippines, Indonesia and Australia. However, it is widely cultivated in the tropics and subtropics (including China, Africa, Brazil, Florida (USA) and the Caribbean).

Cedrela odorata (Spanish cedar).

2021 ◽  
Author(s):  
Nick Pasiecznik
Keyword(s):  
Cedrela Odorata ◽  
Natural Distribution ◽  
Coffee Plantations ◽  
Northern Mexico ◽  
Large Tree ◽  
Ornamental Tree ◽  
Plantation Species ◽  
The Caribbean ◽  
Spanish Cedar ◽  
The Tropics

Abstract C. odorata is a large tree up to 40 m tall and 2 m in diameter which produces a light-weight timber. Its natural distribution range is confined to the New World, extending from northern Mexico to Argentina, including the Caribbean. It is widely planted throughout the tropics and its timber is well known for its use in cigar boxes and a broad range of other products, including musical instruments. It is also occasionally planted for shade and used as an ornamental tree on roadsides and in parks. C. odorata has great potential as a plantation species, due to its fast growing and timber producing characteristics. It is also used as an agroforestry species in cocoa and coffee plantations (Lemmens et al., 1995). C. odorata is highly vulnerable to attack by shoot borers (Hypsipyla spp.), whose larvae damage seedlings and saplings. There is some evidence that infestation can be controlled by planting C.odorata with other species, such as Leucaena leucocephala, Neolamarckia cadamba or (under light shade) with Eucalyptus deglupta (Lemmens et al., 1995).

Receivers

2016 ◽  
Author(s):  
Alejandra Bronfman
Keyword(s):  
Emerging Technology ◽  
New Markets ◽  
New Yorker ◽  
Amateur Radio ◽  
The World ◽  
Radio Technology ◽  
The Caribbean ◽  
The Creation ◽  
Material Conditions ◽  
The Tropics

Picking up in the early 1920s, this chapter tracks the shift of radio technology from military to commercial uses. It follows linkages among the changing material conditions for Caribbean workers, the radio industry’s search for materials like mica and bakelite, and the generation of new markets. Having placed broadcasting in its ecological and political contexts, the chapter uses the trajectories of two amateur radio operators, John Grinan, a New Yorker/Jamaican son of a plantation owner and a member of the team which produced the first transatlantic wireless signals, and Frank Jones, an American plantation manager in Cuba, famous for his self-promoting shortwave transmissions to recover the world of the tinkerers’ romance with an ether jammed with distant sounds. It traces the creation of audiences and publics for the emerging technology, arguing that radio appealed to listeners not because it shrank distances, but because it underscored them, demarcating the Caribbean as exotic and remote. Ironically, it was the deeper technological connections that would propel the mapping of these imagined boundaries between the “tropics” and “the world.”

Modern and Ancient Sclerospongiae

1983 ◽  
Vol 7 ◽  
pp. 116-129 ◽  
Author(s):  
Willard D. Hartman
Keyword(s):  
Calcium Carbonate ◽  
Coral Reefs ◽  
Thin Layer ◽  
Cell Types ◽  
Living Tissue ◽  
The Caribbean ◽  
Siliceous Spicules ◽  
The Tropics ◽  
Collagenous Fibers ◽  
Warm Temperate

Sclerosponges secrete a basal crystalline and aspicular skeleton of calcium carbonate, either aragonite or calcite, above which lies a thin layer of living tissue which also secretes siliceous spicules and collagenous fibers. The tripartite skeleton of sclerosponges distinguishes them from all other sponges and also from all other multicellular animals, no one of which has an abundant quantity of two disparate minerals helping to make up its skeleton. The cell types and their organization as well as what little is known about their development indicate that the sclerosponges are related to the demosponges. Sclerosponges are inhabitants of shaded crevices, caves and tunnels on coral reefs in both the Caribbean and Indo-Pacific regions. The range of only one species, Merlia normani Kirkpatrick, extends from the tropics into the warm temperate waters of the Mediterranean Sea.

Growth and yield of determinate and indeterminate cowpeas in dryland agriculture

1980 ◽  
Vol 94 (1) ◽  
pp. 137-144 ◽  
Author(s):  
G. S. Chaturvedi ◽  
P. K. Aggarwal ◽  
S. K. Sinha
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Arid Regions ◽  
Growth Habit ◽  
Growth And Yield ◽  
Dry Matter Accumulation ◽  
Peak Period ◽  
Legume Crop ◽  
Pod Development ◽  
The Tropics

SummaryCowpea is an important food legume crop of arid and semi-arid regions of the tropics. In such climates whether a determinate or indeterminate type of growth habit would be more useful is not clear. In the present study a determinate and indeterminate cultivar of cowpea were grown at two population densities under rainfed conditions for 2 years. Grain yield was higher in the indeterminate variety for both years. At higher density more dry matter was produced but it had no effect on grain yield. Nitrogen analysis showed that it moved from leaves to developing pods. However, a large amount of nitrogen was still left in vegetative parts in contrast to cereals. Pod development was completed in 19 days and the rate of dry-matter accumulation during the peak period of growth was as high as 120 mg/day per fruit. It was difficult for the plant to cope with this high demand for photosynthates. It is suggested that more pods can develop on a plant provided the growth rate of individual pods is slower and extended to a longer period.

scholarly journals Field Identification of Citrus Blight

EDIS ◽  
1969 ◽  
Vol 2005 (1) ◽  
Author(s):  
Stephen H. Futch ◽  
Kenneth S. Derrick ◽  
Ronald H. Brlansky
Keyword(s):  
Arid Regions ◽  
Cooperative Extension Service ◽  
University Of Florida ◽  
Young Tree ◽  
Field Identification ◽  
America South ◽  
Citrus Blight ◽  
The Caribbean ◽  
The 1960S ◽  
The Mediterranean Basin

Citrus blight is a disease that causes thousands of trees to become unproductive every year, resulting in losses in excess of $60 million annually. The cause of blight is unknown. The disease is found in many citrus-producing regions including North America, the Caribbean, South America, South Africa and Australia. Blight is found in mostly tropical or semitropical regions with moderate to heavy rainfall but is not reported in more arid regions such as the Mediterranean Basin and California. Blight has been present in Florida for more than 100 years and was frequently called young tree decline in the 1960s and 70s. This document is HS995, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published February 2005.  HS995/HS241: Field Identification of Citrus Blight (ufl.edu)

scholarly journals Pteris tripartita (giant brake).

2020 ◽  
Author(s):  
Jeanine Vélez-Gavilán
Keyword(s):  
Native Species ◽  
Reproductive Capacity ◽  
Native Range ◽  
Floodplain Wetlands ◽  
Critically Endangered Species ◽  
Secondary Vegetation ◽  
The Caribbean ◽  
Southern Florida ◽  
The Tropics ◽  
Basin Wetlands

Abstract Pteris tripartita is a terrestrial fern native to the tropics of the Old Word, introduced to the New World as an ornamental, with records of its being sold in nurseries in Florida (USA) in the 19th century. It is naturalized at scattered localities from Florida to northern South America, including the Caribbean. It is reported as invasive in Cuba and the south of Florida, USA. Its invasiveness in Cuba is due to its high reproductive capacity and its spread into secondary vegetation and cultivated lands in the eastern part of the country. In southern Florida, it is considered as a moderately invasive species, recorded as escaping cultivation in 1928. It is invasive in floodplain wetlands, basin wetlands and mesic uplands, displacing native species. It is not reported as invasive in its native range. It is regarded as a critically endangered species in India.

scholarly journals PRECODEPA: A MULTI-COUNTRY DEVELOPMENT PROGRAM TO IMPROVE THE RESEARCH-EXTENSION INTERFACE FOR POTATO PRODUCTION IN THE TROPICS

HortScience ◽  
1991 ◽  
Vol 26 (6) ◽  
pp. 724C-724
Author(s):  
Alvaro del Cid ◽  
Ramiro Ortiz ◽  
H.R. Valenzuela
Keyword(s):  
Development Program ◽  
Potato Production ◽  
Small Farm ◽  
North Central ◽  
Technology Generation ◽  
Extension Work ◽  
The Caribbean ◽  
The Tropics ◽  
Training Of Personnel ◽  
Unique Program

PRECODEPA was formed with the purpose of coordinating research and extension to improve small-farm potato production. The program involves 9 countries in North, Central America and the Caribbean with the cooperation of the International Potato Center (CIP). Research and extension work was planed based on identified bottlenecks. Work was coordinated when similar bottlenecks were identified in different regions and/or countries. The project strategies emphasized the following: training of personnel to coordinate the work between extension and research; development of integrated pest management (IPM) practices; technology generation and validation trials on farmers' fields, and market development for commercialization purposes. The success of this unique program should serve as a model for similar agricultural projects in the future.

scholarly journals Chemical composition of rhizoma perennial peanut (Arachis glabrata) harvested for hay in the tropics

1969 ◽  
Vol 87 (1-2) ◽  
pp. 1-18
Author(s):  
Teodoro M. Ruiz ◽  
Efraín Cancel
Keyword(s):  
Chemical Composition ◽  
Crude Protein ◽  
Nutritive Value ◽  
Forage Yield ◽  
Neutral Detergent Fiber ◽  
Tropical Grasses ◽  
Arachis Glabrata ◽  
Agricultural Experiment ◽  
The Caribbean ◽  
The Tropics

The effect of harvest interval (HI), six-, nine-, and 12-wk, and season of growth (winter, spring, summer, and fall) on crude protein (CP) and neutral detergent fiber (NDF) was studied with rhizoma perennial peanut (RPP) TARS line nos. 17033, 17050, 17052, and 17097 (PI nos. 276233, 262826, 262833, and 262839, respectively) and cv Florigraze and Arbrook at the Lajas Agricultural Experiment Substation. The same parameters were evaluated with PI nos. 276233, 262839, and cv Florigraze at the Juana Díaz Substation. The overall mean CP concentration for RPP, across HI and season of growth was 16.3 and 15.5% in the Lajas and Juana Díaz studies, respectively. In both trials, accession 17033 had the lowest (14.2%) and accession 17097 the highest (16.7%) CP values (P < 0.05). Harvest interval negatively influenced CP concentration (P < 0.01). An increase in HI from six to 12 weeks resulted in a reduction of CP from 17.3 to 15.5%, and from 16.5 to 13.7% in the Lajas and Juana Díaz studies, respectively. In the latter study the CP concentrations of forage harvested at six and nine weeks were similar. Differences in NDF among RPPs were significant (P < 0.05) in both trials. In both, accession 17033 had the highest (49.9%) and accession 17097 the lowest (48.1%) concentration. Increasing HI resulted in quadratic increases (P < 0.01) in NDF concentration. Results for the six-, nine- and 12-wk intervals were 47.8, 50.9, and 51.8% at Lajas and 45.8, 44.5, 52.0% at Juana Díaz, respectively. Season of growth did influence chemical composition of RPP; however, unlike the pattern observed in tropical grasses, the chemical composition of RPP was better in the seasons of greater forage yield (spring and summer). These results show the excellent potential for high nutritive value of RPP when grown in the Caribbean tropics. 

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