public static int tickRate = 256;
public char ticker = (char)IC2.random.nextInt(tickRate);

public void updateEntity()
  {
    super.updateEntity();

    ticker = ((char)(ticker + '\001'));
    if (ticker % tickRate == 0) {
      tick();
    }

    if (dirty) {
      dirty = false;
      worldObj.markBlockForUpdate(xCoord, yCoord, zCoord);
      worldObj.updateLightByType(EnumSkyBlock.Block, xCoord, yCoord, zCoord);
      if ((IC2.platform.isSimulating()) &&
        (!IC2.platform.isRendering()))
        for (String field : getNetworkedFields())
          ((NetworkManager)IC2.network.get()).updateTileEntityField(this, field);
    }
  }

public void tick()
  {
    if (!IC2.platform.isSimulating()) return;

    if (ticker % (tickRate << 2) == 0) {
      humidity = updateHumidity();
    }

    if ((ticker + tickRate) % (tickRate << 2) == 0) {
      nutrients = updateNutrients();
    }

    if ((ticker + tickRate * 2) % (tickRate << 2) == 0) {
      airQuality = updateAirQuality();
    }

    if (crop == null) {
      if ((!upgraded) || (!attemptCrossing())) {
        if ((IC2.random.nextInt(100) == 0) && (!hasEx())) {
          reset();
          crop = IC2Crops.weed;
          size = 1;
        } else {
          if ((exStorage > 0) && (IC2.random.nextInt(10) == 0)) exStorage -= 1;
          return;
        }
      }

      assert (crop != null);
    }

    crop.tick(this);

    if (crop.canGrow(this)) {
      growthPoints += calcGrowthRate();

      if ((crop != null) && (growthPoints >= crop.growthDuration(this)))
      {
        growthPoints = 0;
        size += 1;
        dirty = true;
      }
    }

    if (nutrientStorage > 0) nutrientStorage -= 1;
    if (waterStorage > 0) waterStorage -= 1;

    if ((crop.isWeed(this)) && (IC2.random.nextInt(50) - statGrowth <= 2))
      generateWeed();
  }