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Library ResourceConstituticiónEnero, 1981Micronesia
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Library ResourceConstituticiónEnero, 1981Palau
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Library ResourceConstituticiónDiciembre, 1980Cabo Verde
The President promulgated the constitution after being approved by the National Assembly.
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Library ResourceConstituticiónDiciembre, 1980Chile
The constitution was ratified by 67% of voters.
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Library ResourceConstituticiónDiciembre, 1980Guyana
The constitution was adopted by Parliament.
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Library ResourceConstituticiónDiciembre, 1980Vanuatu
The constitution was drafted by Constitutional Planning Committee and finalised by a constitutional conference. It was ratified by the British and French governments.
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Library ResourceArtículos de revistas y librosDiciembre, 1980Suiza, Bélgica
General principles of plant nutrition don't furnish the concrete information, necessary for practical treatments in a given situation. Thus, the questions arise which parameters must be considered an how can they be determined. This leads to consider the concepts of nutrients diagnosis, as well as the methodology and the corresponding equipment and instrumentation, for putting it into practice.
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Library ResourceArtículos de revistas y librosDiciembre, 1980Indonesia, Estados Unidos de América, Filipinas, Uganda, China, Italia, Asia
An international journal of forestry and forest industries
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Library ResourceArtículos de revistas y librosDiciembre, 1980Benin, Nigeria, Zambia, Malí, Ghana, Congo, Sierra Leona, Níger, Colombia, Kenya, Liberia, Japón, Camerún, Chad, Senegal, Sudán, Togo, Côte d'Ivoire, África
Policy makers as well as scientists have started to acquire an honest appreciation of the possibilities of reducing the wastage of materials which could be profitably utilized for improving or maintaining soil productivity. In addition, the great opportunities offered by making more efficient use of the potentials of biological nitrogen fixation in farming systems are now fully recognized. A number of recommendations and suggested guidelines were made by the various Working Groups during the two-week Workshop.
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Library ResourceArtículos de revistas y librosDiciembre, 1980Bangladesh, Alemania, Perú, Indonesia, Bulgaria, Bolivia, Portugal, Myanmar, Rumania, Japón, Turquía, Uzbekistán, Italia, Brunei Darussalam, India, Bhután, Paraguay, México, Brasil, Grecia, Asia sudoriental
Projections reveal that to sustain the likely world population in the year 2000, an increase of 60 percent in agricultural production will be required. "Is there sufficient land to meet these needs?" becomes the overriding question. However, little precise information exists on which to base a reliable answer. Previous appraisals of the global extents of arable lands, to support present and future human populations, vary from 3 to 7 thousand million hectares. Estimates of the populations these lands can support, vary from 7.5 to 40 thousand million.
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