1 Subjects: “...biological nitrogen fixation, nitrate, nitrogen use efficiency, nutrition, medicinal plants...”

2 Subjects: “...nitrogen use efficiency, toxicity, bacteria, principal component analysis, biochemistry...”

3 Subjects: “...nitrogen use efficiency...”

4 Subjects: “...nitrogen use efficiency...”

5 Subjects: “...nitrogen-use efficiency...”

6 Subjects: “...nitrogen use efficiency...”

7 Subjects: “...nitrogen-use efficiency...”

8 Subjects: “...nitrogen use efficiency...”

9 Subjects: “...nitrogen use efficiency...”

10 Subjects: “...nitrogen use efficiency...”

11 Subjects: “...nitrogen use efficiency...”

12 Subjects: “...nitrogen use efficiency (NUE)...”

13 Subjects: “...nitrogen use efficiency...”

14 Subjects: “...photosynthetic nitrogen use-efficiency...”

15 Subjects: “...nitrogen use efficiency...”

16 Subjects: “...nitrogen-use efficiency...”

17 Subjects: “...nitrogen use efficiency...”

18 Subjects: “...nitrogen use efficiency (NUE)...”

19 Subjects: “...nitrogen use efficiency...”

20 Subjects: “...nitrogen use efficiency...”