Statistics and Definitions

State	Samples
AL	31
AR	5,391
AZ	18
CA	3,099
CO	639
CT	86
DE	967
FL	2,782
GA	37,087
HI	5
IA	15,798
ID	1,121
IL	15,534
IN	44,072
KS	2,787
KY	4,327
MA	39
MD	453
ME	137
MI	14,265
MN	1,468
MO	4,165
MS	17
MT	30
NC	168,446
ND	304
NE	4,313
NH	245
NJ	160
NM	13
NY	28,302
OH	12,034
OK	2,762
OR	920
PA	10,109
RI	6
SC	11,403
SD	137
TN	457
TX	7,958
UT	150
VA	18,600
VT	2,049
WA	888
WI	57,131
WV	40

Number of All Samples in Database: 588,242
Number of All Samples in Database with known location: 480,745
Number of All Lab Results in Database: 6,322,068

Updated 2026-09-01

Region	Samples
Midwest	255,775
Northeast	43,906
Northern Plains	5,581
Pacific Northwest	3,039
Southeast	260,685
Southern Plains	13,657
Southwest	3,380
Undisclosed Region	2,219

If an Animal or other amendment type <5 for the USA, it is labeled as an "Undisclosed Region" for a given year.

See the Data Explorer page to browse and download Sample data.

Unit conversion equations used came from the Recommend Methods of Manure Analysis, Second Edition.

Definitions

IQR

Interquartile range

IQR25

25th percentile of values

IQR50

middle value of all samples, same as the median

Median

middle value of all samples

IQR75

75th percentile of values

Min

minimum value of all samples

Mean

average value of all samples

Max

maximum value of all samples

Animal Type Combined Category	Animal Type
Swine	Swine, Swine - Farrow to Wean, Swine - Farrow to Feeder, Swine - Farrow to Finish, Swine - Gestation, Swine - Finisher, Swine - Boar Stud, Swine - Nursery, Swine - Wean to Finish, Swine - Feeder to Finish
Poultry	Poultry, Chicken, Chicken - Breeder, Chicken - Broiler, Chicken - Broiler Layer, Chicken - Layer, Chicken - Pullet, Turkey, Turkey - Meat, Turkey - Hen
Beef	Beef, Beef - Breeding, Beef - Calf, Beef - Finisher, Beef - Replacement Heifers, Beef - Stocker
Dairy	Dairy, Dairy - Calf and Heifer, Dairy - Calf, Dairy - Heifers, Dairy - Lactating Cow, Dairy - Dry Cow, Dairy - Steer