Essays about: "leaf reflectance"

Showing result 1 - 5 of 10 essays containing the words leaf reflectance.

  1. 1. Using Sentinel-2 Satellite Images to Estimate Traits of Forage Grasslands

    University essay from SLU/Dept. of Agricultural Research for Northern Sweden

    Author : Niklas Zeiner; [2021]
    Keywords : Remote sensing; Forage grasslands; Sentinel-2; Dry matter yield; Canopy average height; Total leaf chlorophyll content; Partial least squares; Support vector machines;

    Abstract : In this project, regression models based on data from field measurements and spectral information extracted from satellite imagery were used to estimate traits of forage grasslands; dry matter yield, canopy average height and total leaf chlorophyll. Four fields at SLUs Röbäcksdalen field station were sampled on 22 occasions and a total of 198 samples, including measurement of the highest plant, canopy height, leaf chlorophyll content, canopy spectral reflectance and biomass were collected. READ MORE

  3. 2. Sjukdomsidentifiering i potatis och stråsäd med luftburna multispektrala sensorer

    University essay from SLU/Dept. of Soil and Environment

    Author : Martin Holmberg; [2017]
    Keywords : höstvete; bladmögel; svartpricksjuka; UAS; Solanum tuberosum; Triticum aestivum;

    Abstract : Potato (Solanum tuberosum L.) and winter wheat (Triticum aestivum L. READ MORE

  4. 3. Testing the robustness of the Plant Phenology Index to changes in temperature

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Iain Lednor; [2015]
    Keywords : NDVI; Plant Phenology Index; physical geography and ecosystem analysis; remote sensing; EVI2; Vegetation Index; temperature; phenology.; Earth and Environmental Sciences;

    Abstract : Traditional vegetation indices have long encountered a problem of saturating at high biomass levels. A newly formulated vegetation index, the Plant Phenology Index (PPI), which has a near linear relationship with canopy green leaf area index (LAI) is tested in this study against temperature at 12 sites across Sweden. READ MORE

  5. 4. Estimating leaf area index from satellite data in deciduous forests of southern Sweden

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Sandra Persson; [2014]
    Keywords : SPOT; Geography; Physical Geography; Leaf Area Index; Vegetation Index; Geografi; Naturgeografi; Lövyteindex; Vegetationsindex; Earth and Environmental Sciences;

    Abstract : Leaf area index, LAI, is an important biophysical parameter in ecological modeling. It is the ratio of leaf area per unit ground area. To obtain LAI over large areas in a fast and convenient way the use of satellite data is important. READ MORE

  6. 5. Combining hyperspectral UAV and mulitspectral FORMOSAT-2 imagery for precision agriculture applications

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Caroline Gevaert; [2014]
    Keywords : Physical Geography and Ecosystem analysis; GIS; precision agriculture; crop monitoring; data fusion; Earth and Environmental Sciences;

    Abstract : Precision agriculture requires detailed information regarding the crop status variability within a field. Remote sensing provides an efficient way to obtain such information through observing biophysical parameters, such as canopy nitrogen content, leaf coverage, and plant biomass. READ MORE