Methods for evaluating nutrient status in order to obtain better plant growth and increased yield are constantly being developed and improved. New analytical techniques and procedures for soil and plant analysis have been invented and tested in many countries and laboratories. There have been innovations in data processing leading to preparation of more refined and specific fertilizer recommendations. The purpose of the Consultation was: i.
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Library ResourceArticles et Livresdécembre, 1980Kenya, États-Unis d'Amérique, Belgique, Japon, République dominicaine, Mexique, République-Unie de Tanzanie, Inde, Bulgarie, Pays-Bas, Venezuela, Costa Rica, Barbade, Brésil
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Library ResourceArticles et Livresdécembre, 1980Bangladesh, Allemagne, Pérou, Indonésie, Bulgarie, Bolivie, Portugal, Myanmar, Roumanie, Japon, Turquie, Ouzbékistan, Italie, Brunéi Darussalam, Inde, Bhoutan, Paraguay, Mexique, Brésil, Grèce, Asia du sud-est
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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