800 800 700 700 600 600 600 500 300 500 800 400 300 300 200 200 200 100 100 0 1000 2000 3000 0 AVERAGE FOR 1959 TO 1961 ' 300 I 873 1964 1963 1962 Wes IN MILK, PC/L PRECIPITATIONVS. !8"’Cs IN MILK IN NORWAY 0 / Ayu 1 —_L 1000 2000 3000 0 1962 _L Q . 1 1000 2000 3000 1963 PRECIPITATION, MM Fig. 9——Data for zone 2 showing lines of regression and corres ponding curves of 95% confidence for the years indicated, 800 800 700 700 1964 500 1963 WC, IN MILK, PC/L 600 400 300 200 100 1 j 1000 2000 1962 ] 3000 4000 0 0 1000 2000 1963 _i 3000 4000 PRECIPITATION, MM Fig. 10—Data for zone 3 showing lines of regression and corresponding curves of 95% confidence for the years indicated.

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