1 Subjects: “...Organic Fertilizer Consumption...”

2 Subjects: “...soil fertility...”

3 Subjects: “...mineral fertilization...”

4 Subjects: “...conventional fertilizers...”

5 Subjects: “...fertilization...”

6 Subjects: “...fertilization...”

7 Subjects: “...German fertilizer legislation...”

8 Subjects: “...soil fertility index...”

9 Subjects: “...fertilizer plant...”

10 Subjects: “...fertility...”

11 Subjects: “...fertility...”

12 Subjects: “...fertilizer...”

13 Subjects: “...chemical fertilizer...”

14 Subjects: “...water and fertilizer regulation...”

15 Subjects: “...fertilizer-yield-response...”

16 Subjects: “...fertility...”

17 Subjects: “...slow-release fertilizers...”

18 Subjects: “...fertilizer application...”