نتایج جستجو برای: crop modelling

تعداد نتایج: 229326  

Journal: :Environmental Modelling and Software 2023

Multi-model ensembles are becoming increasingly accepted for the estimation of agricultural carbon-nitrogen fluxes, productivity and sustainability. There is mounting evidence that with some site-specific observations available model calibration (with vegetation data as a minimum requirement), median outputs assimilated from biogeochemical models (multi-model medians) provide more accurate simu...

2016
T. Stavrakou J.-F. Müller M. Bauwens I. De Smedt C. Lerot M. Van Roozendael P.-F. Coheur C. Clerbaux K. F. Boersma R. van der A Y. Song

The large-scale burning of crop residues in the North China Plain (NCP), one of the most densely populated world regions, was recently recognized to cause severe air pollution and harmful health effects. A reliable quantification of the magnitude of these fires is needed to assess regional air quality. Here, we use an eight-year record (2005-2012) of formaldehyde measurements from space to cons...

Journal: :Remote Sensing 2017
Suyoung Park Dongryeol Ryu Sigfredo Fuentes Hoam Chung Esther Hernández-Montes Mark O'Connell

The capability to monitor water status from crops on a regular basis can enhance productivity and water use efficiency. In this paper, high-resolution thermal imagery acquired by an unmanned aerial vehicle (UAV) was used to map plant water stress and its spatial variability, including sectors under full irrigation and deficit irrigation over nectarine and peach orchards at 6.12 cm ground sample...

2004
D. Luquet M. Dingkuhn J. Dauzat

Most agronomic models estimate canopy light interception using the Beer-Lambert law. This method only accounts for leaf area index (LAI) and leaf angle distribution (LAD) without considering the crop’s structural heterogeneity in space, or soil-leaf or leaf-leaf radiative scattering. These factors have been extensively studied during the past ten years e.g; (Luquet et al. 1998; Nouvellon et al....

Journal: :Field Crops Research 2021

Rice is cultivated throughout Africa in a vast array of environments. Crop growth modelling at AfricaRice seeks to develop an understanding genotype, management and environment interactions inform research development. This paper reviews progress made over thirty years modelling, as well the knowledge gaps remaining. Major advances were phenology heat- cold-induced sterility. crucially took int...

Ch. Nitin D.N. Swarooparani J. Surabhi P.K. Aggarwal P.M. Govindakrishnan S. Naresh Kumar,

India is the second largest producer of potato in the world. The Indo-Gangeticplains (IGP) is the main potato growing region accounting for almost 85% of the1.8 Mha under the crop in India where it is grown as an irrigated crop during thewinter season. Since IGP is in sub-tropical plains, duration of the thermally suitablewindow is the main determinant limiting yields. Hence the impact of clima...

Journal: :Environmental Modelling and Software 2006
Luca Incrocci Gianni Fila Gianni Bellocchi Alberto Pardossi Carlo Alberto Campiotti Roberto Balducchi

Process-based modelling approaches developed for field crops were adapted to address the behaviour of indoor-grown soil-less lettuce under alternative growth conditions. The equations for crop growth and development were simplified to common and consistent terms, re-designed against the peculiarities of a controlled environment and implemented into an easy-to-use, management-oriented, software ...

2004
Igbekele A. Ajibefun Karl-Otto Wenkel Ralf Wieland Wilfried Mirschel

This article presents an integrated ecologic and economic model to study landscape and land use change, using the Spatial Analysis Modelling Tool (SAMT). The study involves integrating these models to analyse landscape and land use changes in Quillow region of North East Germany. Different price and premium scenarios were implemented to indicate the likely effect of policy change. Results of th...

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