SYSTEMS-BASED LAND-USE EVALUATION AT THE SOUTH COAST OF PUERTO RICO

1998 ◽  
Vol 14 (2) ◽  
pp. 191-200 ◽  
Author(s):  
J. W. Hansen ◽  
F. H. Beinroth ◽  
J. W. Jones
Keyword(s):  
Land Use ◽  
Puerto Rico ◽  
South Coast ◽  
The South

Putting the Tree Back into the Landscape

2011 ◽  
Author(s):  
David Beresford-Jones
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Keystone Species ◽  
South Coast ◽  
Desert Ecosystem ◽  
Landscape Changes ◽  
The South

This book began with the archaeology of the Ullujaya and Samaca basins of the lower Ica Valley on the south coast of Peru. The archaeological investigations described here were undertaken to answer the following questions. Were these basins ever significantly more productive and vegetated landscapes? If so, when and how did change take place, and why? And how did these ecological and landscape changes correlate with cultural ones? The second part of the book conducted a thorough review of the botanical and agroforestry literature, together with the researchers' own observations, on the ecological keystone species of the region, the huarango — a tree of the genus Prosopis — to show how important a role this genus plays in the desert ecosystem of the south coast of Peru. This concluding chapter seeks to achieve a synthesis between these two parts to offer answers to those aforementioned questions posed by today's austere landscape of the lower Ica Valley. In so doing, it proposes a model for geomorphological, ecological, and land-use changes through time for the basins of the lower Ica Valley. It also aims to relate this model to cultural trajectories.

Potential evapotranspiration for the south coast of Puerto Rico with the Hargreaves-Samani technique

1969 ◽  
Vol 72 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Megh R. Goyal
Keyword(s):  
Water Management ◽  
Puerto Rico ◽  
Potential Evapotranspiration ◽  
South Coast ◽  
Semiarid Region ◽  
Crop Water ◽  
The South ◽  
Water Requirements ◽  
Vegetables And Fruits ◽  
Maximum Minimum

The Hargreaves and Samani model was used to estimate monthly potential evapotranspiration (PET) for Central Aguirre, Fortuna and Lajas substations and Magueyes Island located on the south coast of Puerto Rico. The model uses maximum, minimum and average temperatures. Daily PET varies from 3.68 to 5.37 mm/day in the region with minimum in December and maximum in July. Annual PET was 1613.3 mm/year for Central Aguirre, 1653.5 for Fortuna, 1846.9 for Lajas, 1857.9 for Magueyes Island, with a regional average of 1704.6. These PET values can be used to estimate crop water requirements for vegetables and fruits, to plan irrigation and water management projects, and to schedule irrigation in the semiarid region of Puerto Rico.

Sequential sampling plan for corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), in corn fields on the south coast of Puerto Rico.

1969 ◽  
Vol 92 (3-4) ◽  
pp. 207-214
Author(s):  
Lymari M. Calero-Toledo ◽  
Raúl Macchiavelli ◽  
Ángel L. González
Keyword(s):  
Puerto Rico ◽  
Helicoverpa Zea ◽  
Sequential Sampling ◽  
Corn Earworm ◽  
Sampling Plan ◽  
South Coast ◽  
Effective Control ◽  
The South ◽  
Sequential Sampling Plan ◽  
Corn Fields

The corn earworm, Helicoverpa zea (Boddie), is the major insect pest of corn, Zea mays L., in Puerto Rico. The objective of this study was to design a sequential sampling plan with fixed precision levels for H. zea (Boddie) in corn fields on the south coast of Puerto Rico. For determining the presence (= 1) or absence (= 0) of H. zea eggs, 25 corn plants were randomly sampled from December 2003 to March 2004. Data were analyzed by using the beta binomial distribution. Critical density levels of 0.10 and 0.08 infested plants, before and after the emergence of ear silks, were used for Iwao's and converging lines formulae. A converging line sampling plan is recommended because it selected a smaller average sample size. This plan can be used to make cost effective control decisions on field corn in Puerto Rico.

scholarly journals Análise do Processo de Voçorocamento e Proposta de Ordenamento Territorial no Litoral Sul da Paraíba (Brasil) (Review of the Voçorocamento and Proposed Land Use on the South Coast of Paraiba (Brazil))

2013 ◽  
Vol 5 (5) ◽  
pp. 1215
Author(s):  
Bilal Sanmartin Paladini ◽  
Rafael Cámara Artigas ◽  
Eduardo Rodrigues Viana de Lima
Keyword(s):  
Land Use ◽  
Natural Resources ◽  
Natural Hazards ◽  
Atlantic Forest ◽  
Natural Resources Management ◽  
South Coast ◽  
Land Uses ◽  
The South ◽  
Mata Atlântica ◽  
Resources Management

 Para se chegar a uma proposta de ordenamento territorial no sentido de minimizar os problemas decorrentes dos processos erosivos intensos existentes no litoral paraibano, foi feito um estudo sobre a gênese de duas voçorocas, buscando-se propor uma hipótese baseada nas mudanças do uso do solo, uma vez que a área sob estudo é muito sensível a esse tipo de processo erosivo devido  suas características geomorfológicas, climatológicas e de uso do solo. A partir do conhecimento da gênese desses processos erosivos e através de uma cartografia de riscos naturais associados a voçorocas, foi proposto o ordenamento territorial do litoral sul da Paraíba, levando em consideração a possibilidade de criação de corredores ecológicos entre manchas de Mata Atlântica e outros tipos de vegetação nativa em áreas susceptíveis a erosão linear.Palavras-chave: Voçoroca, piping, laterita, erosão. Review of the Voçorocamento and Proposed Land Use on the South Coast of Paraiba (Brazil) ABSTRACTThe main objective of this work is to make a proposal of natural resources management with the aim of generate cartography of natural hazards linked to gullies. The final aim of the research is to create cartography of natural hazards linked to gullies processes in order to create corridors between patches of Atlantic Forest. A description of two voçorocas was executed to formulate a hypotesis  aiming to explain the genesis of the erosion based on land uses changes. Finally we explained the recover and stabilitation process on the erosion carried out by the LEPAN (Laboratory of Spacial Analisis - Federal Universtity of Paraiba). Our area is very susceptible to gully processes due his geomorphology, climatology and human occupation.Keywords: Voçoroca, piping, laterite, erosion. 

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