Published December 1982. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
La lagune de Nador se caractérise par un écosystème semi-fermé, en communication avec la mer par une étroite passe. Cet écosystème est sous l'influence de plusieurs facteurs externes tels que l'ensoleillement, l'apport en eau douce, les eaux de ruissellement, le lessivage des champs agricoles et les eaux usées urbaines. L'influence...
La filière des produits aquatiques en France subit des mutations importantes, sous la triple poussée d'une contrainte croissante sur la ressource, de l’internationalisation des marchés, et de la modernisation de la distribution. Son évolution présente des similitudes avec celles de certaines filières des produits animaux à moments donnés de leur...
Pinot noir is Oregon's most important wine grape variety, representing 38% of the state's total wine production. Oregon State University began importing Pinot noir clones from California and France in the 1970's to insure that Oregon growers had access to the full range of clonal types. Almost all of the...
This research was conducted in the Mamora National Forest of
Morocco to: (1) Evaluate the effect of cork oak (Quercus suber L.)
crown cover on seasonal herbage production, nutritive quality, and
foliar cover on two distinctive sites in each of two years (1982,
1983) and to (2) assess the effects...
L'étude socio-économique de la pêche artisanale aux Comores avait pour objectif la proposition d'un cadre de politique de développement du système Pêche, Les deux axes prioritaires de ce travail portent sur les conditions de rentabilité des flottilles et sur les circuits de commercialisation. Dans un document de synthèse, des recommandations...
With the rapid onset of globalization, there are a large number of political, economic and social factors which are constantly changing. These all have profound effects on the demographics of individual populations. This shift in social demography is accompanied by an epidemiologic transition as well.
In order to gain an...
Mycorrhizal fungi are important in food production of arid lands.
The desert truffles not only form a symbiotic association with range
plants but also form fruiting bodies which are both prized as food and
nutritious. The taxonomy and ecology of two genera of desert truffles
are treated in this thesis....
Germination strategies and early seedling development
of selected Medicago and Hedysarum species were evaluated to
identify plants with high potential for range rehabilitation
in central Tunisia. Temperature (5°C to 25°C) and water
stress (0 MPa to -0.8 MPa) affected the germination
percentage of all Medicago and Hedysarum species. Water
stress...
Within the French fish farming sector, both in the freshwater sector (trout, carps) and in the marine sector (seabass, seabream, turbot), during the last years have emerged a number of quality schemes. These quality schemes show various forms (national charters with third part certification, standard, official quality labels, private certification,...
In recent years Zaire has changed from a net exporter to a
net importer of maize. Four districts of South Central Zaire were
selected to investigate factors which limit the production and the
supply of marketed maize grain in Zaire.
Farmers in this area were interviewed to collect data on...
The evaluations performed in this thesis were intended to provide a partial basis for the selection of species and varieties for reseeding Central Tunisian rangelands. The first evaluation determined the effects of four moisture regimes and two growth mediums on seedling emergence and early root and shoot development of eight...
Governments in less developed countries have recognized
in recent years the need to liberalize economic policies in
order to increase efficiency in agricultural commodity
markets. In an attempt to help decision makers assess
alternative choices, most policy studies, however, have
focused on the efficiency norm criterion without much
consideration for...
We tested two genes together in hybrid poplars (genus Populus), CP4 and GOX, for imparting tolerance to glyphosate (the active ingredient in Roundup® herbicide). Using Agrobacterium-based transformation, 80 independent transgenic lines (i.e., products of asexual gene transfer) were produced in a variety of hybrid poplar clones (40 lines in Populus...
This research was conducted in the Mamora cork oak
forest of Morocco to: (1) Describe the impacts of sheep
grazing (none, 35% use, 70% use) in March, April, May and
June of 1987 and 1988 on seasonal forage production; (2)
evaluate the effects of these factors on annual changes
in...
Testosterone plays an essential role in sexual differentiation of the male sheep brain. The ovine sexually dimorphic nucleus (oSDN), is 2 to 3 times larger in males than in females, and this sex difference is under the control of testosterone. The effect of testosterone on oSDN volume may result from...
In the early 1990s, the crisis of the fishing industry resulted in both economic and human tragedies. Drawing conclusions from the crisis the fishing fleets experienced at that time, some groups of producers started to think of better enhancement of their production. Since then, they have tried to adapt their...
This research investigated the longevity of functional connections between leaf traces and stem xylem in 16 species of conifers to better understand the spatial use of sapwood for water transport. The first question was which ring(s) stained when a vacuum was applied to the distal end of the cut surface...
Rising consumer concern over intensive food production issues has resulted in an increase in demand for organic
alternatives to a wide variety of foods including fruit and vegetables, meat and poultry. More recently, there has also been
considerable interest in the marketing of more environmentally-friendly supplies of fish, including those...
Mycorrhizal fungi in arid and semiarid rangelands have received little study in southwest Asia and north Africa, although they are important in food production and rangeland productivity. The desert truffles of the genera Terfezia and Tirmania form fruiting-bodies and mycorrhizae with rangeland plants. This thesis treats the taxonomy and the...
We evaluated effects of chemical fertilizer, spacing, and interplanted nitrogen-fixing trees on wood density and diameter growth of 15-year-old Eucalyptus saligna trees. The trees were grown in silvicultural trials established on former sugarcane land on the island of Hawaii. Elevation was 480 m, slopes were gentle, and annual rainfall averaged...
Shellfish farming is the most common and the most established activity of aquaculture in France and in EU15. Such as main suppliers of mussels and oysters, mariculture production makes up the referent market for bivalves molluscs, unlike most other aquatic species for which capture fisheries are prevalent. Moreover, the specificity...
Understanding the interplay between energy and water is central to effective natural resource management. With enough energy it is possible to secure sufficient water, with enough water it is possible to produce nearly boundless energy. The sun is the engine which drives the availability of both these resources; nearly every...
Centuries of continuous grain cropping in northern Africa have
reduced N levels in soils to a degree such that agricultural production
is now largely dependent upon nitrogen fertilizer. Through the
identification of highly effective legume and Rhizobium strain combinations,
the production of protein-rich livestock forage and green
manure can be...
This review concentrates on 10 recent publications dealing with various aspects of radiation exchange in forest vegetation. The articles are discussed with respect to the following categories: definitions,
instrumentation, the modification of radiation by vegetation, and radiation budgets. The papers reviewed have appeared for the most part during the period...
Cereal crops cultivated in Mali, Mauritania and Senegal consist
primarily of sorghum, millet, rice and maize. They form the gramineous
crops that, are programmed for the agricultural improvement of
the Senegal River Basin. Twelve economically important insect pests
on these crops were selected for study and treated with regard to...
This paper provides an analysis of the market potential for organic salmon, primarily in the European Union. There
has been a substantial growth in the demand for organic food products in industrialised countries in the course of the past
decade. Legislation for organic production is now being extended to aquaculture,...
Abstract only. For complete paper: M. C. Healey and T. Hennessey. 1998. The paradox of fairness: the impact of escalating complexity on fishery management. Marine Policy 22:109-118.
In the world, Japan has a special place in the fish consumption, as Japanese people are among the most important consumers of aquatic food products, and Japan ranks first as fish importer, for supplying about half of its market. Thus the changes in the Japanese seafood market are susceptible to...
Sand dunes are found along the coasts of most of the large land
masses of the world. Because of their proximity to man and his
activities, the maritime sand dunes of Europe, particularly Germany,
France, Holland and Scandinavia, have the longest history of stabilization
activities and botanical investigation. There are...
Strawberry is one of four crops included in the USDA-NIFA Specialty Crop Research Initiative-funded RosBREED project along with apple, peach, and cherry. Phenotyping strawberry for specific horticultural and commercial traits is important to identify associations with genotypic marker(s). This process is the first step in translating genomic knowledge into enhanced...
Hop is a dioecious perennial with female plants grown commercially
for brewing purposes. Parent selection in hop breeding on the basis of
heterotic potential has not been reported in literature even though dominance
has been reported in hops for several economically important traits.
The objectives of this study were to...
Genetic control of cold hardiness in two-year-old seedlings was compared with that in 7-year-old saplings of 40 open-pollinated families in each of two breeding populations (Coast and Cascade) of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) from western Oregon. In addition, the efficacy of bud phenology traits as predictors...
Genetic variation in spring cold hardiness of shoots prior to bud break was studied in two Oregon breeding populations of Pseudotsuga menziesii var. menziesii (Mirb.) Franco, one on the west slope of the Cascade Mountains and the other in the Coast Range. In March and April 1993, and April 1994,...
The effect of canopy orientation on fruiting performance of 'Beurre
d'Anjou' pears (Pyrus communis L.) and postharvest urea spray on ovule
longevity and fruit set of 'Doyenne du Comice' pears were studied.
Hedgerows of 'Beurre d'Anjou' pear trees planted in 1969 in two
orientations north-south (N-S) and east-west (E-W) were...
Previous studies of coral viruses have employed either microscopy or metagenomics, but few have attempted to comprehensively link the presence of a virus-like particle (VLP) to a genomic sequence. We conducted transmission electron microscopy imaging and virome analysis in tandem to characterize the most conspicuous viral types found within the...
High seroprevalance for Brucella abortus among elk on Wyoming feedgrounds suggests that supplemental feeding may influence parasite transmission and disease dynamics by altering the rate at which elk contact infectious materials in their environment. We used proximity loggers and video cameras to estimate rates of elk-to-fetus contact (the primary source...