wheat codebooks

	A	B	C
1	Metadata variable	Meaning	Required?

2	program	code for research program that conducts or oversees the trial	Yes
3	trial	unique identifier for a single field trial based on the program, nursery, loc_abbr, year, and agronomic_trt_trial	Yes
4	location	location of trial	Yes
5	year	year of trial (YYYY)	Yes
6	experimental design	type of experimental design (alpha lattice, incomplete block, or randomized complete block design)	Yes
7	irrigation	irrigation status of trial	Yes
8	tillage	tillage regime that the land is managed under	Yes
9	farm type	the type of farm	Yes
10	planting date	date trial was planted (YYYY-MM-DD)	Yes
11	harvest date	date trial was harvested (YYYY-MM-DD)	Yes
12	agronomic notes	outcome or observations at field trial
13	agronomic treatment (trial level)	a code of the agronomic treatment for the trial
14	average annual rain (inches)
15	cephalosporium stripe date	date cephalosporium stripe infection evaluated
16	chemical treatments	chemical treatments applied in addition to N-P-K-S fertilizer
17	elevation (ft)	elevation (ft)
18	emergence date	date of seedling emergence
19	free lime (%)	soil free lime (%)
20	fusarium date	date fusarium infection was evaluated
21	harvest area (square ft)
22	height harvest date	date canopy height was measured at harvest stage
23	K (ppm)	soil test value for potassium (parts per million)
24	lodging date	date lodging evaluated
25	N (lbs/acre)	soil test value for nitrogen (pounds per acre)
26	NPKS (lb/acre)	nitrogen, phosphorus, potassium and sulfure applied (N-P-K-S in lb per acre)
27	nursery	indicator for type of trial
28	P (ppm)	soil test value for phosphorus (parts per million)
29	pH	soil pH (no depth provided)
30	pH (1 ft)	soil pH measured at sample depth of 1 ft
31	pH (6 in)	soil pH measured at sample depth of 6 in
32	PI	shortened code for the trial principal investigator who oversaw the field trial
33	planter type	planter type
34	previous crop	common name of the crop grown the previous year
35	row spacing (in)	distance between tines when planting (inches)
36	S (ppm)	soil test values for sulfur (parts per million)
37	seed rate (lb/acre)	Pounds of seeds planted per acre
38	seed rate per acre	target seeding rate
39	seed rate per square foot	Number of seeds per square foot
40	seed treatment	whether a seed treatment was applied (most likely a fungicide)
41	septoria date	date septoria infection evaluated
42	soil organic matter (%)	soil organic matter as assessed at planting
43	soil type	NRCS soil classification
44	stand date	date stand % was measured
45	strawbreaker date	date strawbreaker footrot infection evaluated
46	stripe rust date	date stripe rust infection evaluated
47	tiller count date	date of tiller count
48	trial latitude	latitude of trial location (decimal degrees)
49	trial longitude	longitude of trial location (decimal degrees)
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