Y	X	fert
107.5	319	I
89.2	300	I
102.2	280	I
88.1	318	I
121.4	308	I
119.4	306	I
110.6	316	I
106.4	290	I
114.7	315	I
116.4	330	I
96.1	302	I
102.5	321	I
103.6	308	II
102.8	307	II
110	280	II
105	315	II
100.3	304	II
111.1	310	II
113.6	303	II
120	306	II
106.9	299	II
129.2	315	II
107.8	353	II
114.4	307	II
84.4	319	III
84.5	320	III
76.9	299	III
104.7	319	III
111.7	315	III
100.8	334	III
114.7	284	III
88.9	314	III
114.4	310	III
106.4	319	III
106.5	310	III
116.4	316	III
115.6	275	IV
108.1	302	IV
87.5	268	IV
120.3	311	IV
126.1	290	IV
119.2	296	IV
122.2	295	IV
130	299	IV
115.8	297	IV
136.9	317	IV
122.8	294	IV
126.7	302	IV