Hydrology fixes

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedBlockResolution.java

@@ -510,6 +510,15 @@ public final class ModdedBlockResolution {
     }
 
     public static boolean canPlaceOnto(Block mat, Block onto) {
+        if (mat == Blocks.SUGAR_CANE) {
+            return onto == Blocks.SUGAR_CANE || onto == Blocks.GRASS_BLOCK || onto == Blocks.DIRT
+                    || onto == Blocks.COARSE_DIRT || onto == Blocks.PODZOL || onto == Blocks.MYCELIUM
+                    || onto == Blocks.ROOTED_DIRT
+                    || onto == Blocks.MOSS_BLOCK || onto == Blocks.PALE_MOSS_BLOCK || onto == Blocks.MUD
+                    || onto == Blocks.MUDDY_MANGROVE_ROOTS || onto == Blocks.SAND || onto == Blocks.RED_SAND
+                    || onto == Blocks.SUSPICIOUS_SAND;
+        }
+
         if (mat == Blocks.CACTUS) {
             return onto == Blocks.CACTUS || onto == Blocks.SAND || onto == Blocks.RED_SAND;
         }

adapters/modded-common/src/test/java/art/arcane/iris/modded/ModdedBlockResolutionContractTest.java

@@ -69,6 +69,19 @@ public class ModdedBlockResolutionContractTest {
         assertTrue(ModdedBlockResolution.isDecorant(Blocks.CACTUS.defaultBlockState()));
     }
 
+    @Test
+    public void sugarCanePlacementRequiresNativeSubstrate() {
+        for (Block block : new Block[]{Blocks.SUGAR_CANE, Blocks.GRASS_BLOCK, Blocks.DIRT, Blocks.COARSE_DIRT,
+                Blocks.PODZOL, Blocks.MYCELIUM, Blocks.ROOTED_DIRT, Blocks.MOSS_BLOCK, Blocks.PALE_MOSS_BLOCK,
+                Blocks.MUD, Blocks.MUDDY_MANGROVE_ROOTS, Blocks.SAND, Blocks.RED_SAND, Blocks.SUSPICIOUS_SAND}) {
+            assertTrue(block.toString(), ModdedBlockResolution.canPlaceOnto(Blocks.SUGAR_CANE, block));
+        }
+        for (Block block : new Block[]{Blocks.STONE, Blocks.GRAVEL, Blocks.CLAY, Blocks.DIRT_PATH,
+                Blocks.FARMLAND, Blocks.AIR, Blocks.WATER}) {
+            assertFalse(block.toString(), ModdedBlockResolution.canPlaceOnto(Blocks.SUGAR_CANE, block));
+        }
+    }
+
     @Test
     public void sulfurAndDripstoneTipsReceivePostLoadUpdates() {
         for (Block block : new Block[]{Blocks.SULFUR_SPIKE, Blocks.POINTED_DRIPSTONE}) {