Mapping Weed Infestation in Maize Fields Using Sentinel-2 data
Yoliswa Mkhize,Sabelo Madonsela,Moses Cho,Basanda Nondlazi,Russell Main,and Abel Ramoelo
Yoliswa Mkhize
Precision Agriculture Research Group, Advanced Agriculture and Food, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
Sabelo Madonsela
Precision Agriculture Research Group, Advanced Agriculture and Food, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
Moses Cho
Precision Agriculture Research Group, Advanced Agriculture and Food, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
Department of Plant Science, University of Pretoria, Pretoria 0001, South Africa
Basanda Nondlazi
Precision Agriculture Research Group, Advanced Agriculture and Food, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
Russell Main
Precision Agriculture Research Group, Advanced Agriculture and Food, Council for Scientific and Industrial Research (CSIR), Pretoria 0001, South Africa
Scion Research, Rotorua 3046, New Zealand
Abel Ramoelo
Centre for Environmental Studies, Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria 0001, South Africa
We find West African SIF to increase during the dry season and peak prior to precipitation, similar to the Amazon. In Central Africa, we find a continental-scale bimodal seasonality in SIF, the minimum of which is synchronous with precipitation, but its maximum is likely less related to environmental drivers. We also find important differences in the seasonality of SIF and VIs, which indicates that VI-based estimates of photosynthesis could be inaccurate as they have been shown to be the Amazon.
