Information on the outlook of yield and production of crops over large regions is essential for government services dealing with import and export of food crops, for agencies playing a role in food relief, for international organisations with a mandate in monitoring the world food production and trade, as well as for commodity traders. In Europe, such information is provided by the MARS (Monito...

BACKGROUND The study of the prehistoric origins and dispersal routes of domesticated plants is often based on the analysis of either archaeobotanical or genetic data. As more data become available, spatially explicit models of crop dispersal can be used to combine different types of evidence. METHODOLOGY/PRINCIPAL FINDINGS We present a model in which a crop disperses through a landscape that ...

A model was developed for phosphorus (P) concentration over time in a closed aeroponic coriander culture. In addition, the setting and starting up of soilless culture is described, measurements electrical conductivity (EC), pH major ions mixing tank are provided. By using mass balance principles, dynamics nutrient drainage solution stated. Two series continuous stirred reactors considered flow ...

The main objective of this paper is to review the progress that has been made in South Africa with respect to whole-farm economic modelling over the past 2 decades. Farming systems are complex and careful consideration to the stochastic dynamic nature of irrigation farming processes and their linkages with the larger water system is necessary when conducting whole-farm modelling. Both simulatio...