Nitrogen Distribution Model: A Farmer and Farm-Centred Model to Monitor N Movement in the Soil

作     者：J. Mthandi F. C. Kahimba A. K. P. R. Tarimo B. A. Salim M. W. Lowole 

作者机构：Department of Agri. Eng. and Land Planning Sokoine University of Agriculture Morogoro Tanzania Department of Crop Science Bunda College of Agriculture Lilongwe Malawi 

出 版 物：《Journal of Water Resource and Protection》 (水资源与保护（英文）)

年 卷 期：2014年第6卷第16期

页      面：1546-1552页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：Nitrogen Distribution Model Modeling Water Nitrogen 

摘      要：There are several models that monitor movement of nitrogen in the soil. Most of these models have not been widely used in southern Africa because of sophisticated equipment required to collect data and the data needed to run the model are intensive. Nitrogen Distribution Model (NDM) has been developed to ensure that it responds to increasing need of managing nitrogen in agricultural systems characterized by smallholder farmers who do not have adequate resources to collect intensive data for modeling. NDM has parameters that are explicit and mostly intuitive and maintains good balance of simplicity and robustness. With the nature of smallholder farming in Malawi where over 85% of population are rural-based smallholder farmers, the model has also be designed so that it can acts as database to keep track of farmers and farms so that were given farm-specific nitrogen and water management advice.