Sluice and Medley

Sluice went first, because in a dry year, water is where the trouble shows.

"A field of one single crop," Sluice said, "all the same plant, all the same size — they all get thirsty at exactly the same time, in exactly the same way. Same roots, same depth, all reaching for water at once. So when the well ran low, your whole field went thirsty together, all of it, all at once. There was no give in it. One crop, one thirst, one collapse." She opened her little gate and let a trickle run down a model field of identical rows — and watched it dry out uniformly, every row wilting together. "You didn't water badly. You watered a field built to fail all at the same moment. When there wasn't quite enough, there was no plant in it that could get by on less, or reach deeper, or wait. They were all identical — so they all fell identical." She looked across at Medley. "But that's only half of why the neighbor held on. The water's my half. The why-it-had-give — that's hers."

Medley took over, because variety is what gives a field room to survive.

"Your neighbor's field," Medley said, cocking her glossy head, "I'd bet, was a mix. Different crops, different kinds, all tangled together." She laid out her model of the tangled field — corn and beans and squash and deep-rooted things and shallow ones. "And here's why that held through the drought. Different plants drink differently. Some have deep roots that reach way down to water your one crop's shallow roots could never touch. Some need less to begin with. Some shade the ground and keep the soil damp and cool so less water burns off. So when the dry came, the mixed field didn't all go thirsty at once — the deep-rooted ones kept finding water, the tough ones got by on little, the shady ones held the moisture in, and they shared it, and helped each other, and most of the field pulled through." She fluffed her patchwork feathers. "A field of one thing has one plan for a dry year, and if that plan fails, everything fails. A field of many things has a dozen plans. Some of them work even in the worst summer." She looked at Sluice. "But variety alone isn't the whole story either. Even a mixed field still needs some water, guided well. That's his half."

And then, together, they showed the girl the whole picture — why the field that held, held.

"Here's the thing," said Sluice, "neither of us alone makes a field tough. Watch." He ran his trickle of water over Medley's mixed model — and this time, with the deep roots reaching and the shade holding moisture, the same small amount of water went so much further, and the field stayed green where the single-crop field had gone brown. "The mixed field doesn't just survive on variety. It survives because its variety lets a little water do a lot. The deep roots find what my channels miss. The shade keeps what I bring from burning off. A well-watered mixed field and a well-watered single field look the same in a good year. But in a hard year —"

"— the mixed one holds and the single one falls," Medley finished. "Because water and variety together make give. My variety gives the field many ways to survive a shortage; his careful water keeps those many ways alive long enough to work. Separately —"

"— all the careful watering in the world can't save a single-crop field once the well runs dry, because they all fail at once," said Sluice.

"— and all the variety in the world can't save a field that gets no water at all," said Medley. "But together — a mix of crops and water guided wisely — that's a field that holds through a summer that kills its neighbors. That's why theirs lived. Almost certainly, they had both."

The girl looked at the two model fields — the tidy dead one and the tangled living one — and understood, at last, that her family's field hadn't failed from lack of hard work. It had failed from having only one plan and one thirst, with nothing to give when the hard year came.