... 1/13/01 10:46 AM Page 7172 STRUCTURE AND FUNCTION IN AGROECOSYSTEMS DESIGN AND MANAGEMENT can be made between the individual-based models (e.g., Pacala and Silander,19 85) and cellular automaton ... 10:46 AM Page 75 76 STRUCTURE AND FUNCTION IN AGROECOSYSTEMS DESIGN AND MANAGEMENT Timing of ControlMore recently, interest in the threshold level at which weed control is jus-tified has been ... Sonderheft,12:147– 155 .Viaux, P. and Rieu, C., 19 95. Integrated farming systems and sustainable agriculture in France, in Integrated Crop Protection: Towards Sustainability? McKinlay, R.G. and Atkinson, D., Eds.,...