It rains 0.8 inches on a night the district planner gave thirty percent, and Janelle has stopped holding that against it. The planner reads the same radar the YardDesk pods read. It has to say a number at six in the evening. The rain doesn't.
Thursday, the twenty-eighth of October, 3:40 in the morning, Schaefer's #17 outlet. Bean stubble, wet to the shin. The tile is running for the first time since the third of the month and she smells it before the headlamp finds the pipe: egg, faint, under the mud and the chopped stalks. Not strong. Enough.
She kneels on the feed sack she keeps behind the seat for this. The pipe mouth is a black ring with a lip of orange crust, and the water comes out of it in a rope about as thick as her wrist, steady, a sound like a tap left on in another room.
The kit is Dale's. Foil pouch, two glass vials, a strip of glass ampoules with their necks scored, a color card printed in six oranges from pale to rust. He gave it to her at his counter two weeks ago and said, "Read it at the pipe. Not in the truck. Not at my place. At the pipe, in five minutes, or don't bother."
Ferrous iron, the kind still dissolved, the kind that only stays dissolved where there's no oxygen, turns phenanthroline orange. Iron that has already met air and gone to rust doesn't. Dale's lab numbers on #17 had said the water coming off this field was still reducing, still coming up out of soil with no oxygen in it, sulfate high, iron 2.4. He'd also said the filter he used lets colloids through, and colloidal rust reads as iron, and so 2.4 was a bet.
She fills the vial straight from the rope of water, not from a bottle, because a bottle is ten seconds of air. She snaps the ampoule neck with her thumb through a fold of shop rag and drops it in. She caps it, turns it over twice, and starts the timer on her phone with a wet knuckle.
Headlamp off, to save her eyes. The rain has thinned to the kind that is mostly in the air. Out past the waterway a combine she can't see is still running, lights on the far side of somebody's quarter, a farmer trying to beat Friday. A dog, once, somewhere toward Green Valley.
At four minutes she turns the headlamp on and the vial is the color of weak tea going orange. At five she holds it against the card, the lamp behind it, and moves it down the six squares until it sits between two of them.
Between 1.5 and 2.
She reads it again because Dale will ask. Same. She photographs it against the card, which is not the same as reading it and which she'll write down as such. Then she fills Dale's two bottles, one filtered and acidified, one raw, and tapes them the way she taped Bauer's in August, initials and time across the lid and the neck so nobody can open them without tearing her handwriting. #17-S9.
Iron that was still ferrous when it came out of the pipe, measured at the pipe in the dark. It's not a bet any more. It's a number with her knees in it.
Card twelve is still stiff. She writes on the clipboard on her thigh with the headlamp aimed down.
133. 10/28/49 STORM 9 0.8 IN. #17 PIPE FE(II) FIELD KIT ~1.5-2 mg/L AT 5 MIN, EGG FAINT = REDUCED WATER, MEASURED. 2 BOTTLES TO DALE (TOTAL FE). 1.3 H, 48 MI, BLACK (K.S. INV).
Black hours. Kenny Schaefer's invoice, his field, his outlet, paid. Forty-eight miles round trip from her house with the defrost on.
Friday, the twenty-ninth, 1:15 in the afternoon, her desk at the district. The radiator knocks for the first time this fall, three heavy knocks and a hiss. Ray, on the other side of the partition, says "There he is," like the radiator is a person who's been away.
M. Ochoa has answered on YardDesk ticket 44817, copied to Devin Rauch and to her. Devin asked the question four days ago, and she'd stopped expecting an answer: who put Hartsburg West on the pilot list.
Hartsburg W came from our siting agent. It ranks candidate outlets for the pilot by how much independent data exists nearby. It found the district's attributed points and scored Hartsburg high. I've pulled it. Pilot sites will now require a signed owner record before they're ranked at all.
She reads it and laughs once, out loud, a short ugly sound, and Ray's head comes up over the partition.
"What."
"My controls made Hartsburg look like a good place for a pod."
He waits.
"Every reading I posted next to theirs. Labeled. Not theirs. District attributed point, unpaid, owner consent. Their siting agent read all of that as 'lots of data here, go here.'" She turns the monitor a little so he can see. "The better I keep a field unpaid, the more it looks like a site."
"So stop posting them."
"Then their model's got nothing to be compared to but itself." She scrolls down to Ochoa's last sentence. "And look at the fix. Signed owner record before they rank a site. Every one of my controls has a signed owner record. That's what makes them attributable. Bauer signed. Hartsburg signed. So the new rule doesn't keep the agent off my fields. My fields might be the only ones that pass it."
"So he moved the target."
"He moved it closer to me."
Ray sits back down. Through the partition: "That's a you problem with extra steps."
It is. She writes back, short, and reads it twice for anything that sounds like she's thanking them for doing the thing they should have done in August.
Thank you. Please also exclude Bauer-DLV from ranking, by name. An owner-record requirement doesn't exclude district controls; they all have owner records. Attributed points are there so the fleet has something to be compared to. If the siting agent treats them as an invitation, every control I post becomes a target.
She sends it. Devin texts her a thumbs-up and nothing else, which from Devin is a paragraph.
There's no answer about Bauer by five. The ticket's auto-close counter, the one Ochoa paused in August, still says PAUSED in gray letters, which is the only thing on the page she trusts.
134. 10/29/49 OCHOA: HARTSBURG W CAME FROM YD SITING AGENT RANKING BY NEARBY INDEPENDENT DATA (MINE). PULLED; OWNER RECORD NOW REQUIRED (ALL MY CONTROLS HAVE ONE = FIX MOVES TARGET). ASKED BAUER EXCLUDED BY NAME. 0.4 H, GRAY.
Gray. Nobody's paying for the time she spends asking a vendor not to eat her controls.
Tuesday, the second of November, 10:05 in the morning. The mill's compliance agent said ten business days and beat itself by one, which she'll mention to nobody, because it will sound like praise.
A zip. Eleven PDFs, one per April load delivered to Holtz, each stamped across the top LIME KILN DUST / AG LIMING MATERIAL, each with a lot number and a scale ticket and a little table.
She prints them in the copy room because she wants to put a ruler on them. The printer jams on the seventh and she has to open the side and pull out a crumpled half-page warm as toast. She lays them out on the counter by the scanner where she scanned card eleven for the auditor, in order, and runs a steel ruler down the same row on each.
CaO 34 to 41 percent. Free lime, burnt, the stuff that grabs water and gets hot in your glove.
Loss on ignition 14 to 22. What burns off when the lab heats it. Mostly CO2 still locked in carbonate that the mill's kiln didn't finish cooking.
Calcium carbonate equivalent, eighties.
She calls Dale. He answers eating something crunchy.
"Kiln dust," he says, before she's done reading. "That's half burnt and half not. The LOI is carbonate that was already in it at the mill, so a share of what fizzed on Gary's tailgate came in on the truck. The free lime didn't come in as carbonate. Lying out wet all summer, some of that's been pulling CO2 out of the air since April. Turning back into limestone in his streak."
"How much."
"That's what the isotopes are for. I sent the split Monday."
"So it's both."
"It's both. Truck and air. Welcome to chemistry."
She had been half-hoping for one clean answer to hand Gary across the scale-house counter. Either the mill sold you carbonate and their model's paying you for it or your field did something. The mill sent her a range.
She clips the eleven certificates together with Dale's ash sheet behind them and writes on the top one in pencil, pressing hard enough to dent the page under it: ORIGIN = BOTH. AIR SHARE PENDING δ13C.
135. 11/2/49 MILL CERTS, 11 APRIL LOADS TO HOLTZ: LIME KILN DUST, CaO 34-41%, LOI 14-22%. PART CARBONATE AT MILL, PART FREE LIME = SOME FIELD UPTAKE FROM AIR. δ13C SPLIT AT LAB. 0.5 H, GRAY.
Monday, the eighth of November, 4:30 in the afternoon, Tremont. It's dark at five now. Dale has the lights on over the bench and the space heater going under it, and the place smells like hot dust and the acid bottles.
He has the result face down on the counter, which means it's interesting. When a number is boring he leaves it face up and talks about something else.
He turns it over.
HOLTZ-ASH CARBONATE δ13C: −8.6 ‰
She can read it. She doesn't like reading it alone. Ground limestone from a quarry sits close to zero. Carbonate that forms in a field, out of burnt lime and air and soil gas, comes out somewhere between ten and twenty-five below. Gary's streak is in between.
"Call it a third to a half out of the air," Dale says. "Once. Since April."
"Ten to twenty-five is a wide range for 'a third to a half.'"
"It is. I picked the light end on purpose." He draws two ticks on the back of the sheet with a pen that skips. "Burnt lime sitting in the wet taking CO2 straight out of the air, hydroxide grabbing it, that comes out around minus twenty, minus twenty-five. Fractionation runs light. At minus twenty-five you're at a third. At minus seventeen you're at half. If you make me use minus ten, the same number says most of it's air, and Gary would love that, and I wouldn't sign it."
"YardDesk's going to go right at that."
"So write down which end I used." He makes a third tick near zero and circles it. "And that end I didn't measure either. I'm calling the truck zero because quarry rock is. Kiln dust is half-cooked rock. Partly burnt carbonate doesn't keep the number it started with. And this is corn country. Soil gas under corn stalks is heavy, and carbonate made out of it lands near zero, right on top of limestone. Some of what I'm calling truck could be field." He pushes the certificates back at her. "They've got lot numbers. Mills keep retains. Get me one April lot out of their sample room and I'll pin the truck end, and then air means air."
"And it's done? The air part?"
"Burnt lime grabs CO2 once and then it's limestone, and limestone doesn't grab anything." He stops. "Unless some of it hasn't finished. Lumps under a crust can keep a raw middle a long time. The crust slows the air getting in." He reaches under the bench and comes up with a brown dropper bottle, the label in his handwriting. "Phenolphthalein. Fresh spade cut through the streak. Pink where there's hydroxide left. Clear where it's all gone over. Then you'll know if it's done, instead of me telling you." He taps the sheet. "Their pod's paying him every fifteen minutes like it's still going."
"Because the pH is still up."
"Because the pH is still up. Pool's sitting on carbonate. Carbonate buffers. The model reads buffer as removal." He shrugs. "It's not a stupid model. It's a model that was trained on fields that weren't spread with kiln dust."
She takes the clip of certificates out of her bag and turns them over, because the backs are blank and the post goes up Thursday with Gary's name on it and she wants to draft it where Dale can say if she's wrong. She writes with the carpenter's pencil, and the first thing she does is cross out the words she's been carrying around since the tailgate: not carbon.
It is carbon. Some of it. Once.
She writes:
Holtz N1/4 ash streak: carbonate 2.6% inorganic C. Mill certs: lime kiln dust. δ13C −8.6: roughly one-third to one-half field-formed from air, assuming a field end-member of −17 to −25 ‰ (hydroxide uptake). Truck end-member assumed near 0, not measured; mill retained April lot requested. One-time since April. Pool pH rise reflects carbonate present, not ongoing removal. Posted with owner's permission and name.
Dale reads it upside down, the way he reads everything she brings him.
"Gary's going to lose most of it."
"He's going to keep the part he got," she says.
"If they pay for a part."
"If they pay for a part."
He takes a bottle of #17-S9 off the shelf behind him, the raw one with her tape still across the cap, and sets it in front of her. "Total iron on your storm nine. 2.1. Your kit said 1.5 to 2 ferrous. So most of what's coming off that pipe is still the reduced kind. Ray's going to love that."
"Ray's going to put it on the mileage form."
"Ray's going to put it on the mileage form," he agrees, and goes to get the coffee.
136. 11/8/49 DALE: HOLTZ ASH CARB δ13C −8.6 = ~1/3-1/2 AIR IF FIELD END −17 TO −25 (HIS PICK, HYDROXIDE); −10 WOULD SAY MOST. TRUCK END ASSUMED ~0, NOT MEASURED (KILN DUST + C4 SOIL GAS). ASK MILL FOR APRIL RETAIN. PHENOLPHTHALEIN FOR SPADE CUT. DRAFTED YD POST FOR 11/11 W/ G.H. NAME. 0.7 H, 18 MI, BLACK.
Black because Dale bills the district for the split and the district bills YardDesk's audit escrow for Dale. She has had to explain that sentence to her mother twice.
Thursday, the eleventh of November, 6:20 in the morning, Holtz north quarter, before the elevator. Frost on the stubble, the ash streak a pale stripe she can find in the headlamp without the flags. She cuts a fresh face with the spade, a foot deep, and the crust breaks like the top of a crème brûlée. Dale's dropper, three squeezes down the cut.
Clear. Clear down the face. Then one lump at about four inches, the size of a pea, goes pink at the core while she's watching, a pink like a cheap highlighter.
She cuts two more faces. Clear. Clear, and one more pinhead of pink.
So it's mostly done. Mostly. She writes it on the draft in pencil under one-time since April: mostly complete, spade cut 11/11, 2 of 3 faces pink in small lumps. She emails the mill's compliance agent from the truck asking for a retained sample of any April lot, with the lot numbers off the certificates, and does not expect it before Christmas.
7:10, the Pekin elevator lot is empty now that harvest's in. The probe arm is folded up against the scale house like a heron. Frost on the scale deck, the long steel plate white and printed with tire tracks where the first truck of the morning came in and went out. The burnt-coffee machine is still there, through the window, and still not descaled.
She texts Gary the draft first. She doesn't post things about a man's field without him reading the words, and she sits in the truck with the engine running for heat and her thumbs cold and waits.
Six minutes. Twelve. Twenty.
seed bill paid. put it up.
Then, a minute later:
the air part. does that mean I get something
She looks at that for a while. Out on the road a grain truck goes by empty, rattling, the tarp flapping loose at one corner.
Maybe a little. That part was real. Ask them to pay you for what happened, not for the pH.
She opens ticket 44817. Under the district's attributed points, under Bauer, under the paired storm readings and her struck line and Ochoa's note about the siting agent, she posts it: the ash sheet, the eleven certificates as one PDF, the isotope line, the draft text as written at Dale's counter. Owner field: Gary Holtz. She checks the box that says owner consents to public attribution and the page asks her if she's sure, and she is.
The ticket shows it at 7:34. Nobody from YardDesk is up.
Gary's pickup pulls into the lot ten minutes later, the blue Silverado with a co-op decal half-peeled off the door. He parks next to her, nose to tail so the windows line up, the way farmers park to talk without getting out. He holds up two Casey's cups. He has never once bought her coffee.
She gets out. It's cold enough that her breath shows. She climbs into his cab on the passenger side and the heater is blasting, and the cab smells like the coffee and like the dog that isn't in it.
She hands him her phone with the ticket open. He reads it slowly. His lips move at δ13C, and at one-time, and he reads the last line twice, the one with his name.
"A third to a half," he says.
"Of one time."
"Since April."
"Since April. It's almost done. There's a little left in the lumps. I sprayed it this morning." She shows him the photo, the pink pea in the gray face. "That much. It won't do it again once that's gone."
He nods at the windshield. The frost on the scale deck is starting to go gray where the sun's reaching it.
"They'll take it back on the next statement," he says.
"Probably. Most of it."
"And the part."
"I don't know. Nobody's ever asked them for the part."
He reaches into his shirt pocket and takes out the YardDesk statement, the one he's carried since September, folded in thirds along creases gone soft as cloth. He doesn't unfold it. He hands it to her.
"Put that in your drawer," he says. "I don't need to show it to anybody now."
She holds it. It's warm from his pocket. It says, on the inside, she knows without opening it, a number of tonnes and a vintage and an amount that bought most of a seed bill.
"Gary, if they pay the air part, it'll come on the next one. You'll want that."
"Then I'll come get it out of your drawer."
She finishes the coffee in his cab and he drives off toward Delavan with the decal flapping. Back in her own truck she writes the line on card twelve on her knee with the heater going, and runs the hours up the margin because she's started writing small again.
137. 11/11/49 HOLTZ STREAK PHENOLPHTHALEIN, 3 SPADE FACES: CLEAR EXCEPT PINK IN SMALL LUMPS ON 2 = HYDROXIDE LEFT, MOSTLY DONE. ASKED MILL FOR APRIL RETAIN. POSTED HOLTZ ASH SHEET + 11 CERTS + δ13C (END-MEMBERS STATED) TO YD 44817, OWNER NAME, HIS OK (SEED BILL PAID). G.H. GAVE ME HIS STATEMENT FOR THE DRAWER. 1.0 H, 22 MI, GRAY.
Then she checks the ticket. 8:02. No reply. The pod in Gary's pool has sent the fleet model four more readings since she posted, 7.91, 7.92, 7.92, 7.91, and the model has paid him for all four.
Bauer still isn't on the exclusion list. She puts the statement in the glove box, on top of the Fe(II) kit, and drives to work.