28      crop_code
SU      crop_name_1
Sunflower crop_name_2
2401.4    total_biomass_C
0.3    portion_of_grain
0.45     portion_of_shoot
0.25    portion_of_root
25.0    plant_CN_ratio
15.0      grain_CN
50.0      root_CN_ratio
30.0      shoot_CN_ratio
350     water_requirement
3       max_LAI
5       max_height
1500    TDD_10
1       N_fix
0.45	  initial efficiency of use of absorbed light at 25 C, 340 CO2, (kg CO2/ha/h)/(J/m2/s)
60      maximum rate of leaf photosytensis, kg CO2/ha/h
0.015   rate of crop development in vegetative stage at a reference temperature and reference daylength (1/d, DRCV) 
0.028   rate constant of crop development in reproductive phase at a reference temperature, 1/d (DRCR)
0.44    economic copmponent/storage organc by weight
540.0   specific leaf weight constant, kg dm/ha
7825.0  specific stem weight, kg dm/ha
0.68     ratio of internal/external CO2 concentrations, 0.64-0.9
1.0     maximum root depth for crop, m
0.02    increase rate of root depth, m/day


