More realistic conversion parameters

src/crop/aquacrop.jl

@@ -188,8 +188,8 @@ cropname(cs::CropState) = cropname(croptype(cs))
 function cropheight(cs::CropState)
     biomass = get_aquacrop_biomass(cs)
     # TODO: linear model, fixed params
-    a = 20cm
-    b = 18u"cm * ha" / ton
+    a = 5cm
+    b = 6u"cm * ha" / ton
     return a + b * biomass
 end
 cropcover(cs::CropState) = AquaCrop.canopycover(cs.cropstate)