diff --git a/scripts/kill-planes.lua b/scripts/kill-planes.lua
new file mode 100644
index 000000000..182415e2b
--- /dev/null
+++ b/scripts/kill-planes.lua
@@ -0,0 +1,23 @@
+path = 'scripts'
+if config.install then
+    path = config.install .. '/' .. path
+    package.path = package.path .. ';' .. config.install .. '/lunit/?.lua'
+    --needed to find lunit if not run from eressea root. Needs right [lua] install setting in eressea.ini (point to eressea root from the start folder)
+end
+package.path = package.path .. ';' .. path .. '/?.lua;' .. path .. '/?/init.lua'
+
+config.rules = 'e2'
+
+require 'eressea'
+require 'eressea.xmlconf'
+require 'eressea.path'
+
+eressea.read_game(get_turn() .. '.dat')
+ids = {2081501646, 1967748303, 1137, 2000, 1456894557, 1580742069, 1143084084, 285224813, 604912520, 296884068, 50}
+
+for k,v in ipairs(ids) do
+    p = plane.get(v)
+    print(v, p)
+    p:erase()
+end
+eressea.write_game(get_turn() .. '.new')
diff --git a/scripts/run-turn.lua b/scripts/run-turn.lua
index fc5eebbbf..7ee9165ca 100644
--- a/scripts/run-turn.lua
+++ b/scripts/run-turn.lua
@@ -3,7 +3,6 @@ function nmr_check(maxnmrs)
   if nmrs >= maxnmrs then
     eressea.log.error("Shit. More than " .. maxnmrs .. " factions with 1 NMR (" .. nmrs .. ")")
     write_summary()
-    eressea.write_game("aborted.dat")
     return -1
   end
   print (nmrs .. " Factions with 1 NMR")
diff --git a/src/bind_region.c b/src/bind_region.c
index a28b94c07..24c2fb08d 100644
--- a/src/bind_region.c
+++ b/src/bind_region.c
@@ -582,6 +582,13 @@ static int tolua_plane_get(lua_State * L)
     return 1;
 }
 
+static int tolua_plane_erase(lua_State *L)
+{
+    plane *self = (plane *)tolua_tousertype(L, 1, 0);
+    remove_plane(self);
+    return 0;
+}
+
 static int tolua_plane_create(lua_State * L)
 {
     int id = (int)tolua_tonumber(L, 1, 0);
@@ -739,6 +746,7 @@ void tolua_region_open(lua_State * L)
         tolua_beginmodule(L, TOLUA_CAST "plane");
         {
             tolua_function(L, TOLUA_CAST "create", tolua_plane_create);
+            tolua_function(L, TOLUA_CAST "erase", tolua_plane_erase);
             tolua_function(L, TOLUA_CAST "get", tolua_plane_get);
             tolua_function(L, TOLUA_CAST "__tostring", tolua_plane_tostring);
 
diff --git a/src/kernel/config.c b/src/kernel/config.c
index 56d995bdc..cda449a23 100644
--- a/src/kernel/config.c
+++ b/src/kernel/config.c
@@ -1104,8 +1104,7 @@ void free_gamedata(void)
     while (planes) {
         plane *pl = planes;
         planes = planes->next;
-        free(pl->name);
-        free(pl);
+        free_plane(pl);
     }
 
     while (global.attribs) {
diff --git a/src/kernel/plane.c b/src/kernel/plane.c
index 2542a053d..7e9650d13 100644
--- a/src/kernel/plane.c
+++ b/src/kernel/plane.c
@@ -290,3 +290,33 @@ int read_plane_reference(plane ** pp, struct storage *store)
         ur_add(id, pp, resolve_plane);
     return AT_READ_OK;
 }
+
+void free_plane(plane *pl) {
+    free(pl->name);
+    free(pl);
+}
+
+void remove_plane(plane *pl) {
+    region **rp = &regions;
+    plane **pp = &planes;
+    assert(pl);
+    while (*rp) {
+        region *r = *rp;
+        if (r->_plane == pl) {
+            remove_region(rp, r);
+        }
+        else {
+            rp = &r->next;
+        }
+    }
+    while (*pp) {
+        if (pl==*pp) {
+            *pp = pl->next;
+            free_plane(pl);
+            break;
+        }
+        else {
+            pp = &(*pp)->next;
+        }
+    }
+}
diff --git a/src/kernel/plane.h b/src/kernel/plane.h
index 051c05b69..85c38cf9f 100644
--- a/src/kernel/plane.h
+++ b/src/kernel/plane.h
@@ -68,13 +68,16 @@ extern "C" {
         int miny, int maxy, int flags);
     struct plane *getplanebyname(const char *);
     struct plane *get_homeplane(void);
-    extern int rel_to_abs(const struct plane *pl, const struct faction *f,
+    int rel_to_abs(const struct plane *pl, const struct faction *f,
         int rel, unsigned char index);
-    extern void write_plane_reference(const plane * p, struct storage *store);
-    extern int read_plane_reference(plane ** pp, struct storage *store);
-    extern int plane_width(const plane * pl);
-    extern int plane_height(const plane * pl);
+    void write_plane_reference(const plane * p, struct storage *store);
+    int read_plane_reference(plane ** pp, struct storage *store);
+    int plane_width(const plane * pl);
+    int plane_height(const plane * pl);
     void adjust_coordinates(const struct faction *f, int *x, int *y, const struct plane *pl);
+
+    void free_plane(struct plane *pl);
+    void remove_plane(struct plane *pl);
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/kernel/region.c b/src/kernel/region.c
index c4e2042e4..54e78ec06 100644
--- a/src/kernel/region.c
+++ b/src/kernel/region.c
@@ -645,20 +645,39 @@ void rsetmoney(region * r, int value)
     }
 }
 
-int rherbs(const struct region *r)
+int rherbs(const region *r)
 {
     return r->land?r->land->herbs:0;
 }
 
-void rsetherbs(const struct region *r, int value)
+void rsetherbs(region *r, int value)
 {
     assert(r->land || value==0);
-    assert(value >= 0);
+    assert(value >= 0 && value<=SHRT_MAX);
     if (r->land) {
-        r->land->herbs = (short)(value);
+        r->land->herbs = (short)value;
     }
 }
 
+void rsetherbtype(region *r, const struct item_type *itype) {
+    assert(r->land && r->terrain);
+    if (itype == NULL) {
+        r->land->herbtype = NULL;
+    }
+    else {
+        if (r->terrain->herbs) {
+            int i;
+            for (i = 0; r->terrain->herbs[i]; ++i) {
+                if (r->terrain->herbs[i] == itype) {
+                    r->land->herbtype = itype;
+                    return;
+                }
+            }
+        }
+        log_debug("attempt to set herbtype=%s for terrain=%s in %s", itype->rtype->_name, r->terrain->_name, regionname(r, 0));
+        r->land->herbtype = itype;
+    }
+}
 
 void r_setdemand(region * r, const luxury_type * ltype, int value)
 {
diff --git a/src/kernel/region.h b/src/kernel/region.h
index 70d998a0e..bbc5282b0 100644
--- a/src/kernel/region.h
+++ b/src/kernel/region.h
@@ -202,12 +202,12 @@ extern "C" {
     void rsethorses(const struct region *r, int value);
 
     int rherbs(const struct region *r);
-    void rsetherbs(const struct region *r, int value);
+    void rsetherbs(struct region *r, int value);
+    void rsetherbtype(struct region *r, const struct item_type *itype);
 
 #define rbuildings(r) ((r)->buildings)
 
 #define rherbtype(r) ((r)->land?(r)->land->herbtype:0)
-#define rsetherbtype(r, value) if ((r)->land) (r)->land->herbtype=(value)
 
 
     bool r_isforest(const struct region *r);
@@ -276,6 +276,8 @@ extern "C" {
 
     struct faction *update_owners(struct region *r);
 
+    void region_erase(struct region *r);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/kernel/save.c b/src/kernel/save.c
index e5ea1f400..bf0969545 100644
--- a/src/kernel/save.c
+++ b/src/kernel/save.c
@@ -1066,7 +1066,7 @@ static region *readregion(struct gamedata *data, int x, int y)
             rsetherbtype(r, NULL);
         }
         READ_INT(data->store, &n);
-        rsetherbs(r, (short)n);
+        rsetherbs(r, n);
         READ_INT(data->store, &n);
         if (n < 0) {
             /* bug 2182 */