Kynes looked at Jessica, said: “The newcomer to Arrakis frequently underestimates the importance of water here. You are dealing, you see, with the Law of the Minimum.” She heard the testing quality in his voice, said, “Growth is limited by that necessity which is present in the least amount. And, naturally, the least favorable condition controls the growth rate.” “It’s rare to find members of a Great House aware of planetological problems,” Kynes said. “Water is the least favorable condition for life on Arrakis. And remember that growth itself can produce unfavorable conditions unless treated
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