Theoretical Production Ecology - Science topic

Soil slurries collected from rice paddies were incubated anaerobically at different temperatures. Changes in the composition of electron acceptors and electron donors in the slurries were monitored daily. During the incubation NO3- was reduced first, followed by Fe3 and SO42- reduction and methane production. The first two steps in the reduction se...

The impact of global change on agriculture has been studied extensively for various crops at many different scales. However, relatively few studies have focused on rice, the most important staple food crop in Asia, where the already large population of rice consumers is rapidly increasing. In 1989, the United States Environmental Protection Agency'...

This report has been prepared in the framework of the Mariut project. That project, officially designated "Study of production levels and land use planning of the Western Mediterranean region of Egypt (Mariut)", has been a joint activity of the Centre for Agrobiological Research (CABO), the Department of Theoretical Production Ecology of the Agricu...

In the Netherlands, rotational grazing, with grazing periods of 2 to 5 days, is the most common grazing system at present. In contrast with other countries of North-western Europe, the continuous grazing system is used here only to a limited extent. However, the results of numerous comparative trials at high nitrogen fertilization levels and high s...

[113.413:116.113].The basic equations for mass transport of salt in the soil were analogous to those for development in a population. Both types of processes are modelled by compartmentalization. In such models with layers or classes an artificial dispersion is introduced with a coefficient vB/2, where v is the rate of transport or development and...