25	avg_yield1
50	avg_yield2
-99	avg_yield3
-99	avg_yield4

40	high_yield1
75	high_yield2 
-99	high_yield3
-99	high_yield4 

15	low_yield1
35	low_yield2
-99	low_yield3
-99	low_yield4

2550	avg_residue1
2800	avg_residue2
-99	avg_residue3
-99	avg_residue4

10	users estimate of observed_wind_erosion
11	past WEQ_erosion_estimate