The Application of an Unmanned Aerial System and Machine Learning Techniques for Red Clover-Grass Mixture Yield Estimation under Variety Performance Trials. - Kai-Yun Li; Niall G. Burnside; Raul Sampaio de Lima; Miguel Villoslada Peciña; Karli Sepp; Ming-Der Yang; Janar Raet; Ants Vain; Are Selge; Kalev Sepp (Remote. Sens., 2021)