Obiettivo THIS PROJECT CONTINUES THE WORK BEGUN IN OUR COLLABORATIVE PROJECT UNDER STD 2. PRESENT COLLABORATORS ARE : THE UNIVERSITY OF CAMBRIDGE, ESTACION EXPERIMENTAL DEL ZAIDIN, GRANADA, SPAIN AND THE UNIVERSITY 0F COSTA RICA. THIS PROPOSED PROJECT WOULD ALSO INCLUDE THE INSTITUTE 0F TERRESTRIAL ECOLOGY. UK. WE HAVE LARGE (2+HA.), CAREFULLY MONITORED TRIAL AREAS OF ALLEY-CROPPING AND CLEAR CROPPING IN THE HUMID TROPICAL LOWLANDS OF COSTA RICA. THE SOIL IS VERY ACID (ULTISOL) ; PHOSPHORUS AVAILABILITY IS VERY LOW ; PHOSPHORUS SORBTION BY ALL BUT THE MOST SUPERFICIAL SOIL LAYERS IS VERY HIGH. MULCHING THE SOIL WITH FRESHLY PRUNED FOLIAGE FROM CERTAIN ACID-TOLERANT LEGUME TREE SPECIES, GROWN IN SITU, PRODUCES A VERY MARKED RAISING 0F (MYCORRHIZAL) FINE ROOTS OF THE ALLEY TREES AND CROP PLANTS. APPLICATION 0F ROCK PHOSPHORUS TO THIS MULCH PRODUCES A RESPONSE IN THE CROPS AND TREES AND APPEARS TO DEFEAT PHOSPHORUS SORBTION IN THE SOIL. APPLICATION OF GROUND BASIC ROCKS BENEFITS THE SYSTEM. OUR FOCUS oF INTEREST IS IN SUSTAINABILITY OF PRODUCTION ;THESE PROCESSES ARE VITAL To IT. WE SHALL HAVE 3 YEARS' CROPPING DATA BY THE END OF THE PROJECT UNDER STD 2 ;FOR CONSIDERATIONS OF SUSTAINABILITY WE SHALL NEED 7 YEARS. Campo scientifico natural sciencesbiological sciencesecologyagricultural sciencesagriculture, forestry, and fisheriesagriculturegrains and oilseedslegumes Programma(i) FP3-STD 3 - Specific research and technological development programme (EEC) in the field of the life sciences and technologies for developing countries, 1990-1994 Argomento(i) Data not available Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore University of Cambridge Contributo UE Nessun dato Indirizzo Downing Place CB2 3EN Cambridge Regno Unito Mostra sulla mappa Collegamenti Sito web Opens in new window Costo totale Nessun dato Partecipanti (3) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS Spagna Contributo UE Nessun dato Indirizzo 1,Profesor Albareda 1 18008 GRANADA Mostra sulla mappa Costo totale Nessun dato NERC Institute of Terrestrial Ecology Regno Unito Contributo UE Nessun dato Indirizzo Merlewood Research Station Windermere Road LA11 6JU Grange-over-Sands Mostra sulla mappa Costo totale Nessun dato Universidad de Costa Rica Costa Rica Contributo UE Nessun dato Indirizzo Ciudad Universitaria San José Mostra sulla mappa Costo totale Nessun dato