diff --git a/src/common/gamecode/laws.c b/src/common/gamecode/laws.c
index e79907991..9e42b0a22 100644
--- a/src/common/gamecode/laws.c
+++ b/src/common/gamecode/laws.c
@@ -776,7 +776,7 @@ trees(region * r, const int current_season, const int last_weeks_season)
 		if(production(r) <= 0) return;
 
 		/* Grundchance 1.0% */
-		seedchance = FORESTGROWTH;
+		seedchance = FORESTGROWTH * RESOURCE_QUANTITY;
 		/* Jeder Elf in der Region erhöht die Chance um 0.0008%. */
 		seedchance += (min(elves, (production(r)*MAXPEASANTS_PER_AREA)/8)) * 8;
 		grownup_trees = rtrees(r, 2);
diff --git a/src/common/kernel/resources.c b/src/common/kernel/resources.c
index 3d45621de..e2321f644 100644
--- a/src/common/kernel/resources.c
+++ b/src/common/kernel/resources.c
@@ -130,8 +130,10 @@ static void use_default(rawmaterial *res, const region * r, int amount)
 		++res->level;
 		res->amount = (int)(modifier * res->base * (1+(res->level-res->startlevel)*res->divisor/100.0));
 		/* random adjustment, +/- 91% */
+#ifdef RESOURCE_QUANTITY
+		res->amount = res->amount * RESOURCE_QUANTITY;
+#endif
 	}
-	assert(res->amount>0);
 }
 
 struct rawmaterial *
diff --git a/src/common/settings-eressea.h b/src/common/settings-eressea.h
index 9d48340a6..91222ee99 100644
--- a/src/common/settings-eressea.h
+++ b/src/common/settings-eressea.h
@@ -32,3 +32,5 @@
 #define PEASANTS_DO_NOT_STARVE 0
 #define GUARD_DISABLES_RECRUIT 0
 
+#define RESOURCE_QUANTITY 1.0
+
diff --git a/src/common/settings-tutorial.h b/src/common/settings-tutorial.h
index f1130f1c9..1f4b0dcca 100644
--- a/src/common/settings-tutorial.h
+++ b/src/common/settings-tutorial.h
@@ -30,3 +30,7 @@
 #define SKILLPOINTS 0
 #define NEW_MIGRATION 1
 #define PEASANTS_DO_NOT_STARVE 0
+
+#define GUARD_DISABLES_RECRUIT 0
+#define RESOURCE_QUANTITY 1.0
+
diff --git a/src/common/settings-vinyambar-classic.h b/src/common/settings-vinyambar-classic.h
index 400570e4e..a06072598 100644
--- a/src/common/settings-vinyambar-classic.h
+++ b/src/common/settings-vinyambar-classic.h
@@ -32,3 +32,5 @@
 #define PEASANT_ADJUSTMENT 0
 #define GUARD_DISABLES_RECRUIT 0
 
+#define RESOURCE_QUANTITY 1.0
+
diff --git a/src/common/settings-vinyambar.h b/src/common/settings-vinyambar.h
index 229a4389e..5829a1f71 100644
--- a/src/common/settings-vinyambar.h
+++ b/src/common/settings-vinyambar.h
@@ -32,3 +32,4 @@
 #define PEASANT_ADJUSTMENT 0
 #define GUARD_DISABLES_RECRUIT 0
 
+#define RESOURCE_QUANTITY 1.0