Defining high-yielding model plants for spring cereals

avena sativa caracteres de rendimiento composante de rendement crop yield cultivos de primavera culture de printemps espigas espiguilla fertilisation fertilizer application grain granos hordeum vulgare largura length longueur modelos vegetales plant models poland pologne polonia pot experimentation rendement des cultures rendimiento de cultivos spikelets spikes spring crops stems tallo tige triticosecale triticum aestivum variedades de alto rendimiento yield components