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This paper presents validation results and some management applications of a Tropical Pasture Simulator. The e ects of di erent environmental conditions, N fertilisation regimes and grazing intensities are analysed, and physiological concepts are used to aid in the inter- pretation of the respons...


Herrero, Mario T.Fawcett, R.H.Dent, J.B.[Modelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 2. Model validation and analysis of management practices]Modelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 2. Model validation and analysis of management practices

This paper describes a Tropical Pasture Simulator. This is a simple mechanistic model representing the growth of vegetative tropical pastures under rotational or continuous grazing with responses to N fertiliser, temperature and irradiance that can be used as a tool to study management options fo...


Herrero, Mario T.Fawcett, R.H.Silveira, V.Busqué, J.Bernués, A.Dent, J.B.[Modelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 1. Model definition and parameterisation]Modelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 1. Model definition and parameterisation

Appropriate selection of holistic management strategies for livestock farming systems requires: (1) understanding of the behaviour of, and interrelations between, the different parts of the system; (2) knowledge of the basic objectives of the decision maker managing such enterprise; and (3) under...


Herrero, Mario T.Fawcett, R.H.Dent, J.B.[Bio-economic evaluation of dairy farm management scenarios using integrated simulation and multiple-criteria models]Bio-economic evaluation of dairy farm management scenarios using integrated simulation and multiple-criteria models
Herrero, Mario T.Fawcett, R.H.Dent, J.B.[Seasonal differences in the metabolisable energy concentration of kikuyu grass as predicted from in vitro gas production measurements]Seasonal differences in the metabolisable energy concentration of kikuyu grass as predicted from in vitro gas production measurements

The objective of this study was to predict the in vitro gas production and the estimated metabolisable energy (ME), crude protein (CP) and neutral detergent fibre (NDF) concentrations of kikuyu grass (Pennisetum clandestinum) by near infrared reflectance spectroscopy (NIRS). A total of 288 sample...


Herrero, Mario T.Murray, I.Fawcett, R.H.Dent, J.B.[Prediction of the in vitro gas production of kikuyu grass by near infrared reflectance spectroscopy]Prediction of the in vitro gas production of kikuyu grass by near infrared reflectance spectroscopy

This paper studies the impact of a series of biographical variables and decision-making profiles, representative of the managerial capacity of the farmer, on the management and performance of their farms. It integrates all the profiles representing farmer’s objectives, decision-making approaches ...


Solano, C.León, H.Pérez, E.Tole, L.Fawcett, R.H.Herrero, Mario T.[Using farmer decision-making profiles and managerial capacity as predictors of farm management and performance in Costa Rican dairy farms]Using farmer decision-making profiles and managerial capacity as predictors of farm management and performance in Costa Rican dairy farms
Nanyeenya, W.N.Mugisha, J.Staal, Steven J.Baltenweck, IsabelleRomney, D.L.Fawcett, R.H.Halberg, N.[Risk attitudes, resource rationalization and dairy intensification in Uganda: stochastic dominance with observed and optimal net farm benefits.]Risk attitudes, resource rationalization and dairy intensification in Uganda: stochastic dominance with observed and optimal net farm benefits.

The objective of this work was to determine the applicability of the dry-weight-rank (DWR) method for evaluating the botanical composition of forest understorey vegetation. An analysis of plant species abundance was carried out, and instead of ranking the three most abundant species, as is common...


González Estrada, E.Fawcett, R.H.Herrero, Mario T.[Integrating models of relative abundance of species with the dry-weight-rank method for the botanical analysis of forest understorey vegetation]Integrating models of relative abundance of species with the dry-weight-rank method for the botanical analysis of forest understorey vegetation

The objective of this work was to develop a Decision-Support System (DSS) in order to support the decision making process by campesino farmers of Central Mexico. Two biological models, one socio-economic model and a survey database form the DSS. The CERES-Maize model simulated the yield response ...


Castelán-Ortega, O.A.Fawcett, R.H.Arriaga-Jordán, C.Herrero, Mario T.[A Decision Support System for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part I—Integrating biological and socio-economic models into a holistic system]A Decision Support System for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part I—Integrating biological and socio-economic models into a holistic system

This paper describes the functioning and validation of the Decision Support Systems described in the first part of the paper. The DSS ran three case studies with different farm sizes that represent the range of farmers found in the Valley. The DSS results were validated against survey data for th...


Castelán-Ortega, O.A.Fawcett, R.H.Arriaga-Jordán, C.Herrero, Mario T.[A Decision Support System for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part II—Emulating the farming system]A Decision Support System for smallholder campesino maize-cattle production systems of the Toluca Valley in Central Mexico. Part II—Emulating the farming system

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