Showing papers in "Agricultural Systems in 1987"

TL;DR: In this article, the authors used selected examples from agricultural history, including the origins of agriculture, manorial and modern western agriculture, and the Green Revolution in Indonesia, as combined criteria for evaluating the performance of agricultural development programs and projects.

TL;DR: In this article, the authors describe the Borana system of Southern Ethiopia as an efficient rangeland and livestock managers, who manage to survive in a tightly constrained environment, and suggest that the scope for improvement is limited.

TL;DR: In this article, a cross-cultural review of the literature on home gardening is presented and a definition and policy-relevant typology of household gardening based on ecological and socio-economic determinants is proposed.

TL;DR: This paper represents a departure from the traditional LP approach by formulating the diet formulation problem as a GP model incorporating penalty functions that make the specification of minimum levels of nutrients more flexible and realistic.

TL;DR: In this article, two opposing perspectives of development are presented, in such a way that the dilemmas the European Community is faced with are clarified, and the advantages and disadvantages of these opposite perspectives paves the way for a broad outline of another common agricultural policy that is characterised by both market orientation and solidarity and may lead to a competitive and sustainable agriculture and a fair reconciliation of conflicting agricultural and environmental goals.

TL;DR: In this article, the influence of uncertainty on economic thresholds/critical density models in weed control is examined and two principal sources of uncertainty, potential weed density and the form of the crop loss function, are discussed.

TL;DR: The role of on-farm research in the evaluation of alley farming has been discussed in this article, where the authors argue that, because of the composite nature of the alley farming as a technology, two distinct types of trials are required for its development.

TL;DR: Fallow lands sown to stylo (Stylosanthes spp.) provided a high protein diet supplement to cattle during the dry season and were more effective than natural fallow in restoring soil productivity.

TL;DR: In this paper, the authors argue that the process of commercialization will not alleviate overstocking on communal rangelands and the majority of small herd owners are not likely to endorse any programme of voluntary destocking.

TL;DR: The physical and chemical properties of soils under rubber plots of 1, 7, 11, 14 and 18 years of age were analyzed and compared in order to examine the trend of change in the properties of soil under rubber over time as mentioned in this paper.

TL;DR: Survey and experimental data are presented to show how conflicts in harvesting of cotton and planting of wheat are being resolved through earlier cotton varieties and wheat varieties that perform well over a range of planting dates.

TL;DR: In this paper, a two-year study of sheep and goat production on Maasai group ranches in Kenya is described and the results of sensitivity analyses on the weaning and 18-month indices are presented in order to demonstrate the use of this type of analysis in identifying research and development priorities.

TL;DR: A systems model of the ensilage process is used to study the potential benefits of silage inoculants and increased acid tolerance of the inoculant is predicted to have more effect on ensilage than homofermentation.

TL;DR: A simulation model of the growth of the cassava crop is described in this paper, which estimates crop establishment from temperature data, and weekly increment of total biomass and underground storage organ biomass from temperature, solar radiation, pan evaporation and rainfall data.

TL;DR: A stochastic model was constructed to examine the time-course of production and reproduction traits and inbreeding coefficient of a pig nucleus breeding scheme for different population sizes to study effects of population size and structure, size of founder population and different selection and mating systems on selection response and in breeding coefficient.

TL;DR: Four methods representing four different multiple objective programming (MOP) approaches are described in this paper, and the solutions generated by each method correspond to alternative land allocation schemes identified by land compartment, site quality and management regime.

TL;DR: A dynamic simulation model has been developed that relates beef animal performance to environment, management practices and selective grazing of pastures that reflects herbage quality and mass differences associated with selective grazing.

TL;DR: In this paper, the authors interviewed 52 dairy and fruit/vegetable farmers in the suburbs of Worcester, Massachusetts, a metropolitan area in the heavily urbanized northeast region of the US.

TL;DR: In this paper, the authors present the case of Galicia, a region, located in the northwestern corner of Spain, where traditional family land division and other sociological factors have led to a small-farm situation.

TL;DR: In this article, a model of grassland farming is proposed to maximise overall farm profitability by matching feed availability with animal requirements, taking account of a number of land use alternatives.

TL;DR: The overall system for supplying plantable stems of improved cassava varieties from the International Institute of Tropical Agriculture (IITA) was surveyed for Oyo State where IITA is situated as mentioned in this paper.

TL;DR: Comparing this method to a more traditional estimation method leads to the following major conclusions: a much higher statistical and computational efficiency is achieved; higher dimensional problems can be handled; and ease of use is obtained.

TL;DR: SoYMOD, a computer model of the soybean plant, was upgraded and used to simulate growth at the plant part level and indicated that translocation of photosynthate to the root system and the efficiency of use of this photosynTHate to produce assimilated nitrogen compounds are of considerable importance in determining eventual plant yield.

TL;DR: In this paper, a model for increasing the annual output of edible nutrients (milk), employment generation and obtaining better economic returns per unit area under sericulture, was designed through the application of the integrated systems approach.

TL;DR: In this article, a study described in this paper explored ways of integrating tree planting into the traditional farming system and found that the land outside reserve boundaries forms an alternative source of timber production.

TL;DR: The process of formalizing objectives and defining assumptions in calculating animal-unit-equivalents (AUE) for different classes of beef cattle is discussed in this paper, where relationships among energy demand, forage supply, intake and animal units are examined.

TL;DR: A conceptual model has been developed that relates physiological weight and age in such a way that the composition and efficiency of growth may be determined as discussed by the authors, based on dividing the components of the body into categories.

TL;DR: In this paper, a review of trends in interprovincial trade, prices and market margins shows that the local markets have become integrated in a national market system and this integration is expected to continue.