title: A dynamic growth model of vegetative soya bean plants:  model structure and behaviour under varying root temperature and nitrogen concentration.
abstract: A differential equation model of vegetative growth of the soya bean plant (Glycine max (L.) Merrill cv.  Ransom') was developed to account for plant growth in a phytotron system under variation of root temperature and nitrogen concentration in nutrient solution.  The model was tested by comparing model outputs with data from four different experiments.  Model predictions agreed fairly well with measured plant performance over a wide range of root temperatures and over a range of nitrogen concentrations in nutrient solution between 0.5 and 10.0 mmol NO3- in the phytotron environment.  Sensitivity analyses revealed that the model was most sensitive to changes in parameters relating to carbohydrate concentration in the plant and nitrogen uptake rate.
authors.affiliation: Department of Statistics, North Carolina State University, Raleigh 27695.
authors.forename: J T
authors.initials: JT
authors.lastname: Lim
authors.forename: G G
authors.initials: GG
authors.lastname: Wilkerson
authors.forename: C D
authors.initials: CD
authors.lastname: Raper
authors.forename: H J
authors.initials: HJ
authors.lastname: Gold
mesh_terms: D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000378:metabolism; D004780:Environment, Controlled; D018527:Hydroponics; D008954:Models, Biological; D009584:Nitrogen / Q000378:metabolism*; D009929:Organ Size; D010101:Oxygen Consumption; D010788:Photosynthesis; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D013025:Glycine max / Q000254:growth & development* / Q000378:metabolism*; D013213:Starch / Q000378:metabolism; D013696:Temperature
chemical_list: D002245:Carbon Dioxide; D013213:Starch; D009584:Nitrogen