What needs irrigation in The Rise of the Dragon?

Flax needs irrigation most, and the yield can be as high as 50% after irrigation. Rhus verniciflua was the second, and the yield increased by 30% after irrigation.

Irrigation is very knowledgeable. Not all crops need irrigation. Soybean, millet and Chinese cabbage don't need irrigation, because irrigation doesn't increase production.

The Rise of the Dragon is a strategic management games developed by BreakAwayGames and distributed by Shereshan Company. The Chinese version was published on September 26th, 2003. The game settings and introduction are classic simulated construction games developed by Ogilvy Electronics Agency, BreakAwayGames and Sierra.