Statistics and Definitions

State	Samples
AL	7
AR	7,013
CA	3,099
CO	546
CT	86
DE	541
FL	2,715
GA	37,083
HI	5
IA	14,174
ID	933
IL	13,828
IN	40,374
KS	2,132
KY	95
MA	39
MD	453
ME	137
MI	12,794
MN	1,115
MO	426
MS	7
MT	30
NC	168,435
ND	122
NE	3,992
NH	245
NJ	160
NM	13
NY	25,701
OH	10,908
OK	2,234
OR	837
PA	10,085
RI	6
SC	10,945
SD	137
TN	695
TX	7,309
UT	128
VA	18,009
VT	1,939
WA	865
WI	47,559
WV	40

Number of All Samples in Database: 554,616
Number of All Samples in Database with known location: 447,996
Number of All Lab Results in Database: 5,847,133

Updated 2026-02-24

Region	Samples
Midwest	232,259
Northeast	40,713
Northern Plains	4,945
Pacific Northwest	2,742
Southeast	256,748
Southern Plains	11,807
Southwest	3,322
Undisclosed Region	2,080

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