34 Artículos encontrados ( Mostrando 1 - 10)
  1. Edited by Thomas Fairhurst Una pregunta que se nos hace en ECHO es: “Tienen ustedes una finca orgánica?” Y la respuesta es: “No. Porque debido a nuestros suelos, clima y objetivos únicos nosotros utilizamos herbicidas, insecticidas y fertilizantes minerales según se necesiten. Al mismo tiempo, nuestra meta es minimizar...
    333.761 ASH
  2. Roland Bunch Strong gradients of decreasing soil fertility are found in many regions of the world. Millions of smallholders are now facing this serious crisis which causes them lower crop yields, and many of these families also suffer from food insecurity. With the aim of promoting recovering soil fertility...
    631.874 BUN | SB.043
  3. Anne E. Desjardins et al This publicationbegins with the discovery of maize in Mesoamerica by Columbus in 1492. Subsequent chapters follow the journeys of maize eastward, as milho, makka, and yu mai, to Europe, Africa, Asia, and Australia. Each chapter section begins with a general description of the types of evidence we...
    614.3 DES
  4. Zdenko Rengel If you?re an agronomist, horticulturalist, plant and soil scientist, breeder, or soil microbiologist, you?ll want to read Nutrient Use in Crop Production to find everything you need to know about judicious nutrient management and maximizing nutrient utilization in the agricultural landscape. In...
    631.8 REN
  5. Keith Mikkelson Este libro es una obra importante para la agricultura tropical. Existen muy pocas fuentes de informacion que son realmente "orgánicas" y prácticas para el agricultor comun en el contexto ambiental y tropical. Este libro se dirige a asuntos que son extremadamente utiles para la operación diaria de...
    630. MIK | SC.027
  6. Ronnie Vernooy et al Despite 25 years of history and the rapid growth in number, organizational diversity and geographical coverage of community seed banks, recognition of their roles and contributions has remained scanty. This book reviews their history, evolution, experiences, successes and failures, challenges and...
    631.521 VER
  7. Laura S. Meitzner, Martin L. Price. This is a book of practical ideas. It is written for people who help those who live and make their living under difficult conditions in the tropics and subtropics. What should a development worker do to assist a community? There are no simple answers, but there are many possibilities—plants,...
    633.091 MEI | PI.007, PI.008
  8. S. E. McGregor. Worldwide, more than 3,000 plant species have been used as food, only 300 of which are now widely grown, and only 12 of which furnish nearly 90 percent of the world's food. These 12 include the grains: rice, wheat, maize (corn), sorghums, millets, rye, and barley, and potatoes, sweet potatoes,...
    582.016 USD | PA.006, PG.014
  9. Harry van den Burg 2 Copies Seed production and the maintenance of crop cultivars by small farmers is a subject that has attracted increasing attention over the past decade. The increasing dominance of large multinationals in the seed trade, the controversy over genetic engineering, and the recognition of farmersí...
    631.521 AGR
  10. H. et al. Schreppers Proper management of trees and forests is necessary to make resources sustainable. Treesor rather: woody plants in general play an important part in traditional farming systems in the tropics, not just as food and cash crops but also as suppliers of fuelwood and fodder. Farmers are also aware of...
    631.5 AGR | PG.001