Mana Spreaders now have a 0.95 yield value.

MODSRC/vazkii/botania/api/mana/IManaCollector.java

@@ -11,6 +11,8 @@
  */
 package vazkii.botania.api.mana;
 
+import vazkii.botania.api.internal.IManaBurst;
+
 /**
  * Any TileEntity that implements this is considered a mana collector, by
  * which nearby generating flowers will pump mana into it.<br><br>
@@ -25,5 +27,12 @@ public interface IManaCollector extends IManaReceiver {
 	 * Called every tick on the client case the player is holding a Wand of the Forest.
 	 */
 	public void onClientDisplayTick();
+	
+	/**
+	 * Get the multiplier of mana to input into the block, 1.0 is the original amount of mana
+	 * in the burst. 0.9, for example, is 90%, so 10% of the mana in the burst will get
+	 * dissipated.
+	 */
+	public float getManaYieldMultiplier(IManaBurst burst);
 
 }

MODSRC/vazkii/botania/common/block/tile/TileSpreader.java

@@ -29,6 +29,7 @@ import net.minecraftforge.common.ForgeDirection;
 
 import org.lwjgl.opengl.GL11;
 
+import vazkii.botania.api.internal.IManaBurst;
 import vazkii.botania.api.mana.BurstProperties;
 import vazkii.botania.api.mana.ILens;
 import vazkii.botania.api.mana.IManaCollector;
@@ -324,6 +325,11 @@ public class TileSpreader extends TileSimpleInventory implements IManaCollector
 			burst.getCollidedTile(false);
 		}
 	}
+	
+	@Override
+	public float getManaYieldMultiplier(IManaBurst burst) {
+		return burst.getMana() < 16 ? 0F : 0.95F;
+	}
 
 	@Override
 	public int getSizeInventory() {

MODSRC/vazkii/botania/common/entity/EntityManaBurst.java

@@ -31,6 +31,7 @@ import net.minecraft.util.Vec3;
 import net.minecraft.world.World;
 import vazkii.botania.api.internal.IManaBurst;
 import vazkii.botania.api.mana.ILens;
+import vazkii.botania.api.mana.IManaCollector;
 import vazkii.botania.api.mana.IManaReceiver;
 import vazkii.botania.common.Botania;
 import vazkii.botania.common.block.tile.TileSpreader;
@@ -319,7 +320,11 @@ public class EntityManaBurst extends EntityThrowable implements IManaBurst {
 
 			if(tile == null || tile.xCoord != coords.posX || tile.yCoord != coords.posY || tile.zCoord != coords.posZ) {
 				if(!fake && !noParticles && !worldObj.isRemote && tile != null && tile instanceof IManaReceiver && ((IManaReceiver) tile).canRecieveManaFromBursts()) {
-					((IManaReceiver) tile).recieveMana(getMana());
+					int mana = getMana();
+					if(tile instanceof IManaCollector)
+						mana *= ((IManaCollector) tile).getManaYieldMultiplier(this);
+					
+					((IManaReceiver) tile).recieveMana(mana);
 					PacketDispatcher.sendPacketToAllInDimension(tile.getDescriptionPacket(), worldObj.provider.dimensionId);
 				}