diff --git a/src/ECEC-Model/ECECRestrainedForager.class.st b/src/ECEC-Model/ECECRestrainedForager.class.st
index 03dc9d4..bee6b45 100644
--- a/src/ECEC-Model/ECECRestrainedForager.class.st
+++ b/src/ECEC-Model/ECECRestrainedForager.class.st
@@ -5,12 +5,6 @@ Class {
 	#package : 'ECEC-Model'
 }
 
-{ #category : 'accessing' }
-ECECRestrainedForager class >> entityName [
-
-	^ 'RestrainedForager'
-]
-
 { #category : 'accessing' }
 ECECRestrainedForager class >> harvestRate [
 
diff --git a/src/ECEC-Model/ECECUnrestrainedForager.class.st b/src/ECEC-Model/ECECUnrestrainedForager.class.st
index dd85fba..2bfc3cd 100644
--- a/src/ECEC-Model/ECECUnrestrainedForager.class.st
+++ b/src/ECEC-Model/ECECUnrestrainedForager.class.st
@@ -5,12 +5,6 @@ Class {
 	#package : 'ECEC-Model'
 }
 
-{ #category : 'accessing' }
-ECECUnrestrainedForager class >> entityName [
-
-	^ 'UnrestrainedForager'
-]
-
 { #category : 'accessing' }
 ECECUnrestrainedForager class >> harvestRate [
 
diff --git a/src/ECEC-Model/ECECVegetationUnit.class.st b/src/ECEC-Model/ECECVegetationUnit.class.st
index 6d30537..27c57ab 100644
--- a/src/ECEC-Model/ECECVegetationUnit.class.st
+++ b/src/ECEC-Model/ECECVegetationUnit.class.st
@@ -6,16 +6,14 @@ Class {
 	#instVars : [
 		'biomass'
 	],
+	#classInstVars : [
+		'k',
+		'r'
+	],
 	#category : 'ECEC-Model',
 	#package : 'ECEC-Model'
 }
 
-{ #category : 'accessing' }
-ECECVegetationUnit class >> entityName [
-
-	^ 'VegetationUnit'
-]
-
 { #category : 'accessing' }
 ECECVegetationUnit class >> k [