Adjust soil from digging to match construction needs

data/json/furniture_and_terrain/terrain-walls.json

@@ -846,7 +846,7 @@
       "sound": "heavy rumbling!",
       "sound_fail": "thump",
       "ter_set": "t_fence_post",
-      "items": [ { "item": "material_soil", "count": [ 100, 150 ] } ]
+      "items": [ { "item": "material_soil", "count": [ 50, 75 ] } ]
     }
   },
   {

src/iuse.cpp

@@ -2621,7 +2621,7 @@
     // We also must tone down the yield of dirt to avoid potential problems,
     // the old math was generating more than the tile volume limit.
     //
-    // So to keep it simple, 50 liters for shallow pits, 100 for deep pit. We're basically
+    // So to keep it simple, 200 liters for shallow pits, 400 for deep pit. We're basically
     // assuming that the first step is about one-third of the total work.
 
     constexpr int deep_pit_time = 120;
@@ -2633,7 +2633,7 @@
     ///\EFFECT_STR modifies dig rate
     // Adjust the dig rate if the player is above or below strength of 10.
     // Floor it at 1 so we don't divide by zero, of course!
     const double attr = 10 / std::max( 1, p->str_cur );
 
     // And now determine the moves...
     int dig_minutes = deep ? deep_pit_time : shallow_pit_time;
@@ -2647,7 +2647,7 @@
         result_terrain = deep ? ter_id( "t_pit" ) : ter_id( "t_pit_shallow" );
     }
 
-    return { moves, static_cast<int>( dig_minutes / 60 ), "digging_soil_loam_50L", result_terrain };
+    return { moves, static_cast<int>( dig_minutes / 15 ), "digging_soil_loam_50L", result_terrain };
 }
 
 int iuse::dig( player *p, item *it, bool t, const tripoint & )