Figure 4

Seed yield response index (SYRI) of the tested Canola genotypes fertilized by nitrogen at a rate of 95 kg N ha−1, 120 kg N ha−1, 142 kg N ha−1, 95 kg N ha−1, + yeast extract, 120 kg N ha−1, + yeast extract, 142 kg N ha−1, + yeast extract. ER efficient and responsive, NENR neither efficient nor responsive.