• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 123
  • 47
  • 25
  • 23
  • 19
  • 14
  • 8
  • 7
  • 7
  • 7
  • 7
  • 7
  • 7
  • 6
  • 3
  • Tagged with
  • 340
  • 340
  • 23
  • 23
  • 20
  • 20
  • 16
  • 15
  • 14
  • 14
  • 14
  • 13
  • 13
  • 13
  • 13
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Projektbasierte Klimapolitik und nachhaltige Entwicklung : zertifizierte Treibhausgasminderungen in Costa Ricas Forst- und Elektrizitätswirtschaft /

Vöhringer, Frank. January 2005 (has links)
Zugl.: Frankfurt (Main), Universiẗat, Diss., 2004.
2

Estructura crediticia, coyuntura economica y transición al capitalismo agrario en el Valle Central de Costa Rica (1850-1860)

Rodríguez Sáenz, Eugenia. January 1988 (has links)
Tesis (M.S.)--Universidad de Costa Rica, 1988. / Includes bibliographical references.
3

Numerische Simulation der Kohlenwasserstoffgenese an der Subduktionszone vor Costa Rica

Lutz, Rüdiger. January 2001 (has links)
Aachen, Techn. Hochsch., Diss., 2001. / Computerdatei im Fernzugriff.
4

Numerische Simulation der Kohlenwasserstoffgenese an der Subduktionszone vor Costa Rica

Lutz, Rüdiger. January 2001 (has links)
Aachen, Techn. Hochsch., Diss., 2001. / Computerdatei im Fernzugriff.
5

Formación del estado de Costa Rica

Cerdas Cruz, Rodolfo. January 1967 (has links)
Tesis--Universidad de Costa Rica. / Bibliography: p. 199-206.
6

Study of genetic relationships of avocado (Persea americana Mill.) and related types from Coasta Rica using molecular markers /

Yousef, Amani Adnan. January 2000 (has links)
Zugl.: Hohenheim, University, Diss., 2000.
7

The web of westernization an exploratory study on individual westernization of Costa Rican adolescents in formal and semi-formal educational settings /

Yogev, Abraham, January 1976 (has links)
Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 706-719).
8

The tropical mixed garden in Costa Rica : a potential focus for agroforestry research?

Price, Norman William 05 1900 (has links)
Overpopulation and over-exploitation of resources continues to strain the process of development for many countries in the tropics. In Latin America deforestation and the subsequent marginalization of these lands has put pressure on the agricultural research community to develop appropriate land-use systems for these areas. Agroforestry is one class of such systems that are presently receiving much attention. The tropical mixed garden, in particular, is one such system that has attracted attention from researchers in various countries. The present study has focused upon the traditional mixed garden system, as found in Costa Rica, with the objective of determining its potential for increased contribution to small farming systems. Development of the data base for this assessment included a survey of 225 farms distributed throughout Costa Rica, year-long case studies of six farms, divided between two contrasting ecological zones, and a simple simulation model of a mixed garden agroforestry system. The mixed garden is clearly an important component of small farming systems in Costa Rica. Though half of the gardens studied were only between 0.01 to 0.20 hectares in size, half were greater, and a few encompassed a hectare or more of land. As a percent of total farm size, mixed gardens were most important in the Tropical Dry Forest and Tropical Moist Forest life zones. Mixed gardens are more common in economically depressed areas and less so in areas where farmers are well off. The ranking of various factors representing ecological complexity of mixed gardens is what one would expect if difference in garden complexity were determined solely by between-zone differences in the environment, thus supporting hypothesis 1. On the other hand, multivariate analysis of species presence/absence data for mixed gardens suggest that the hypothesis (Hypothesis 2) that Holdridge's system of ecological classification is an adequate means of stratifying the variation in species composition in mixed gardens is false. The findings also support the hypothesis (Hypothesis 3) that the mixed garden has a higher energy benefit-cost ratio than commercial cropping systems. The commercial cropping systems on the farms studied consumed between 9 to 10,000 times the amount of cultural energy as did the mixed gardens. Mixed gardens on small farms have the potential to contribute much more to the cash economy of the farm household than they generally do at present. The observations reported here concerning labour patterns and management practices, together with the economic analysis, support the hypothesis (Hypothesis 4) that the output of the mixed garden can be improved. The economic and labour use analysis presented here also supports the hypothesis (Hypothesis 5) that "the mixed garden exists as a supplementary enterprise whose primary function is to absorb excess farm labour." With due regard for the limitations of a simulation of the type used in this thesis, I find support for the contention that the traditional mixed garden in Costa Rica can be developed into an ecologically conservative yet commercially viable cropping system. In particular, the incorporation of high-value timber species shows the potential to significantly improve the long-term economy of the farm. Integrating animal production, as Wagner (1957) had advocated earlier, also can enhance garden productivity. / Graduate and Postdoctoral Studies / Graduate
9

Costa Rican democracy: its character and evolution

Walker, James Hess, 1930- January 1965 (has links)
No description available.
10

Jugendstrafrecht in Lateinamerika unter besonderer Berücksichtigung von Costa Rica /

Tiffer-Sotomayor, Carlos. January 2000 (has links) (PDF)
Univ., Diss.--Greifswald, 2000.

Page generated in 0.0715 seconds