The monitoring of irrigation requirements at district or regional scale can be based on the use of ecological process-based models and remote sensing data. The former simulates the time evolution (usually at daily scale) of the main biophysical variables which determine crop photosynthesis and water consumption rates; the latter allows to provide the spatial distribution of these variables over...

This paper summarises the result and findings of a research project, that was aiming at design and development of an information system which supports crop forecasting of major agricultural commodities in Iran. In this system, crop area estimates are generated through area frame sampling and processing of satellite data, and yields are derived through the application of crop growth simulation m...

Groundnut (Arachis hypogaea L.) is an important oilseed crop grown in our country. Majority of crop is under rainfed conditions and as a post rainy season (Rabi) crop in Andhra Pradesh. Several models are available to predict the phenology, growth and yield of groundnut crop. However, no precise models are available to validate the effects of moisture stress on groundnut and their subsequent im...

1. Introduction Systems approach has been used by engineers since the 1950's for the study of complex and dynamic processes but their use by scientists working in biological fields is relatively recent. A system is defined as any well delineated part of reality which may contain a number of interrelated elements forming the systems structure. These functioning components interact in various way...

There is a growing concern that climate changes will lead to significant impact to agriculture, thus having a global effect in food production. The application of crop models to study the potential impact of climate change and climate variability provides a direct link between models, science and the concerns of the society. The objective of this work is to demonstrate an information architectu...

in this study, a complex crop model was developed that integrates the various components of swap and csm-ceres-maize (dssat v4.0) model with the purpose of developing a more efficient model and according to the internal requirements. in the hybrid model, ceres-maize supplies swap model with daily leaf area index and root depth and on the other hand swap model supplies ceres-maize with daily wea...

Modelling nitrogen (N) dynamics is a valuable tool to predict the uptake, mobility and leaching of mineral N in soil pro®les. Many crop/soil N simulation models have been developed in the last 20 years for this purpose. However, methods for the operational evaluation of simulation models are not well established. Standard test statistics such as the Fand t-tests are being questioned because the...