Fix BOP Turnip Seeds extracted into 0mB of Seed Oil (#39)

* Fix BOP Turnip Seeds extracted into 0mB of Seed Oil

* Use `GameRegistry#findItemStack`

src/main/java/forestry/plugins/compat/PluginBiomesOPlenty.java

@@ -126,10 +126,6 @@ public class PluginBiomesOPlenty extends ForestryPlugin {
                 Farmables.farmables
                         .get(FarmableReference.Vegetables.get())
                         .add(new FarmableGenericCrop(boPTurnipSeedStack, boPTurnip, 7));
-                if (PluginManager.Module.FACTORY.isEnabled()) {
-                    RecipeManagers.squeezerManager.addRecipe(
-                            10, new ItemStack[] {boPTurnipSeedStack}, Fluids.SEEDOIL.getFluid(amount));
-                }
             }
 
             Farmables.farmables.get(FarmableReference.Orchard.get()).add(new FarmableBasicFruit(boPTurnip, 7));
@@ -171,6 +167,14 @@ public class PluginBiomesOPlenty extends ForestryPlugin {
             RecipeManagers.squeezerManager.addRecipe(
                     10, new ItemStack[] {persimmon}, Fluids.JUICE.getFluid(200), mulch, 20);
         }
+
+        ItemStack boPTurnipSeedStack = GameRegistry.findItemStack(BoP, "turnipSeeds", 1);
+        if (boPTurnipSeedStack != null) {
+            if (PluginManager.Module.FACTORY.isEnabled()) {
+                RecipeManagers.squeezerManager.addRecipe(
+                        10, new ItemStack[] {boPTurnipSeedStack}, Fluids.SEEDOIL.getFluid(amount));
+            }
+        }
     }
 
     private static void addFlowers() {