Merge pull request #427 from EDmodel/mpaiao-pr-oxygen_lim

Set oxygen limitation to 1 when decomp_scheme is 3 and 4

Author: xiangtaoxu

ED/src/dynamics/soil_respiration.f90

@@ -1688,8 +1688,7 @@ subroutine het_resp_weight(soil_tempk,rel_soil_moist,rel_soil_oxygen,temperature
          !---------------------------------------------------------------------------------!
       case (3,4)
          !------ Not needed, set to one. --------------------------------------------------!
-         water_limitation = rh_moyano12_a0 + rh_moyano12_a1 * rel_smoist_bnd               &
-                          + rh_moyano12_a2 + rel_soil_moist * rel_smoist_bnd
+         oxygen_limitation = 1.0
          !---------------------------------------------------------------------------------!
       case (5)
          !---------------------------------------------------------------------------------!