Yields on the Exhaustion Land and changesin the NPK content of the soils due tocropping and manuring, 1852-1975A. E. Johnston and P. R. PoultonFrom: Rothamsted Experimental Station Report for 1976 Part 2

Yields On The Exhaustion Land And Changes In The Npk Content Of The Soils Due To Cropping And Manuring, 1852-1975 ,A. E. Johnston and P. R. Poulton (1977) Rothamsted Experimental Station Report For 1976 Part 2 pp 53 - 85

Lawes Agricultural TrustHarpenden, HertsUnited Kingdom

http://www.rothamsted.ac.uk/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34