000			022890000a22004690004500
904			_aBCO
905			_aC
908			_aJ
909			_aAS
912			_aEn
912			_aEn
914			_aSILVI
914			_aRIBRE
914			_aAG
082	0	4	_a30973
100			_aBorel, Rolain _950154
100	1		_9113073 _aRomero, F.
260			_c1991
041	0		_aEn
520			_aThe Silvopastoral Project is being implemented by CATIE in the Atlantic humid lowland of Costa Rica, in order to develop alternatives to the current destructive mode of livestock production. The overall approach is briefly described and two superimposed on-farm experiments are discussed in more detail. The main constraints for on-farm research within the project are analysed: the limited previous knowledge of the area and of the local species, the difficulty of achieving a common understanding about research with collaborating farmers, the need for additional staff supervision and the complexity of the statistical analyses. An attempt is made to draw lessons from the ongoing project regarding how to resolve the apparent contradiction between rigorous scientific requirements and questions of inmediate value to extension, the compromises to be achieved between different types of evaluation (statistical, risk, etc.) and the potentials and limitations of farmers' participation in research.
650	1	4	_9149387 _aGLIRICIDIA SEPIUM
650	1	4	_9146425 _aERYTHRINA BERTEROANA
650	1	4	_9164839 _aSISTEMAS DE EXPLOTACION
650	1	4	_9164925 _aSISTEMAS SILVOPASTORILES
650	1	4	_9140060 _aCERCAS VIVAS
650	1	4	_9135804 _aANALISIS ESTADISTICO
650	1	4	_9146013 _aENSAYOS
650	1	4	_9158811 _aPLANES DE DESARROLLO
691			_9149387 _aGLIRICIDIA SEPIUM
691			_9147659 _aFARMING SYSTEMS
691			_9339324 _aSTATISTICAL ANALYSIS
691			_9144256 _aDEVELOPMENT PLANS
692			_aGLIRICIDIA SEPIUM
692			_aSYSTEME D'EXPLOITATION AGRICOLE
692			_aANALYSE STATISTIQUE
692			_aPLAN DE DEVELOPPEMENT
773	0		_tAgroforestry Systems (Países Bajos) _d1991 _gv. 15(2-3) p. 245-257
040			_aCR-TuBCO _cCR-TuBCO _bEs
245	1	0	_aOn-farm research in a silvopastoral project, a case study
942			_cANA
003			CR-TuBCO
999			_c51465 _d51465