Environmental Management on Equine Farms or the Good, the Bad, and the Ugly

Animal Manure Management January 19, 2016 Print Friendly and PDF

Why Look at Environmental Practices of Horse Farms?

Equine farms are often small acreages that may not have ready access to technologies and information appropriate to their farms. Westendorf et al. (2010a) found that many equine farmers use extension services less than other sources of information, but they may use feed stores or neighbors for information (Table 1); Marriott et al. (2012) also found a limited understanding of available conservation resources among equine farmers. Best Management Practice (BMP) adoption on equine farms is the focus of this paper.

Related: Managing Manure on Horse Farms

Table 1. Manure management information sources on equine farms (Total Respondents - 442)

Another Horse Farmer Trade Magazines Cooperative Extension Other Feed Dealer Internet Other Retailer
221 183 229 116 97 89 26

Westendorf et al. (2010a,b)

What did we do?

Equine farms generally dry stack their waste; in a NJ survey (Westendorf, et al. 2010b) over 70% of farms indicate storing manure on farm, many of these sites may lack BMP’s appropriate for a storage (Table 2, 3). Eighty-three percent in this survey had manure storages located greater than 61m from water or wetlands, and 86% had storages located greater than 61m from neighbors; this might indicate their storage does not pose a significant water quality or nuisance risk. Fiorellino et al. (2010) found that even with low levels of BMP adoption, most equine farms had a reduced water quality risk. Over 50% of NJ farmers indicate that they compost manure, but it is my observation that few actually do; the definition of compost may vary from mature compost to rotting decomposition. Seventy-five percent of farms bed with wood shavings, 25% with straw and the remainder with a combination of wood chips, wood pellets, and paper.

Table 2.  Percentage of New Jersey equine survey farms implementing various management practices (%)

Spread manure on farm
Manure storage area
Compost horse manure
Off-farm manure disposal
Maintain and use dry lot areas
Credit manure as a fertilizer
Regular soil tests
Drag pastures regularly
Clean stalls daily
Manure storage <50 ft. from water
Manure storage >200 ft. from water
Manure storage <50gt. from neighbor
Manure storage >200 ft. from neighbor

Westendorf, et al. (2010b)


Table 3. Percentage of equine survey farms spreading or storing manure (%)

No. of horses Spread Manure (n = 442) Manure Storage (n = 434)
1 to 2 55.2 65.3
3 to 5 59.2 62.9
6 to 10 55.3 80.7
11 to 20 50.0 87.9
21 to 40 37.8 94.4
> 40 37.5 93.3

Westendorf, et al. (2010b)

Nearly 60% of horse farms dispose of some manure off the farm; for use as fertilizer, to a centralized composter, on-farm compost for sale, or to be given away are the prime means of disposal; unfortunately some is removed by dumpster. Fifty-four percent spread some manure on-farm, of these only 39% account for any fertilizer value. If we trust the survey, then probably only 20-25% of the farms have an understanding of the fertilizer value of manure; this survey did find a positive correlation between manure spreading and soil testing (P<.05), suggesting some understanding of soil fertility basics.

Fifty-three percent of farms had a sacrifice or exercise lot that provides horses an area for eating, drinking, shelter, and relaxing if needed. A sacrifice area can help to protect pasture and grazing areas. Many farms only have a turnout lot for both exercise and grazing; this can result in greater mud accumulation and other possible water quality concerns.

A feed management survey (Westendorf, et al. 2013) was sent to 500 NJ equine farmers (see Table 4). Forty-five percent received feeding and nutrition information from a feed store, 20% from a veterinarian, only 3% from a professional consultant and 2% from extension. Most farmers had no concept of feeding to reduce excretion of nutrients such as phosphorus. Monitoring intake, cleaning feed bunks and contaminated lots regularly, and disposing all waste feed in the manure storage are good recommendations for all producers. Please see the Williams et al. (2015) abstract in the poster session for more information about an on-farm feeding project.

Table 4. Description of how feeding decisions are made (%)

Balance diets on your own Veterinarian advice No plan at all Feed store advice Consulting nutritionist Extension advice
45 20.5 15 14.5 3 2

Westendorf, et al. 2013

What have we learned?

In summary: 1. Many horse farms dispose some or all manure off-site; 2. Between 50 and 75% spread manure on crop or grazing land; 3. Most have at least a designated location for manure storage; 4. Larger farms are more likely to store manure. 5. Many farms have a low non-point source (NPS) pollution risk, but little understanding of BMP’s; and 6. Pasture management BMP’s are seldom applied.

Future Plans

Outreach should focus on the implementation of low-cost management practices that equine farmers are likely to adopt.


Michael L. Westendorf, Extension Specialist in Animal Science, Rutgers, the State University of New Jersey westendorf@aesop.rutgers.edu


Fiorellino, N. M., J. M. McGrath, B. Momen, S. K. Kariuki, M. J. Calkins and A. O. Burk. 2014. Use of Best Management Practices and Pasture and Soil Quality on Maryland Horse Farms. J. Equine Vet. Sci. 34:257-264.

Marriot, J. M., A. Shober, P. Monaghan and C. Wiese. 2012. Equine Owner Knowledge and Implementations of Conservation Practices. J. of Extension. 50: Issue 5. http://www.joe.org/joe/2012october/rb4.php?pdf=1

Westendorf, M. L., T. Joshua, S. J. Komar, C. Williams, and R. Govindasamy. 2010a. Effectiveness of Cooperative Extension Manure Management Programs. J. Equine Vet. Sci. 30:322-325.

Westendorf, M. L., T. Joshua, S. J. Komar, C. Williams, and R. Govindasamy. 2010b. Manure Management Practices on New Jersey Equine Farms. Prof. Anim. Sci. 26:123-129.

Westendorf, M. L., V. Puduri, C. Williams, T. Joshua, and R. Govindasamy. 2013. Dietary and Manure Management Practices on Equine Farms in Two New Jersey Watersheds. J. Equine Vet. Sci. 33:601-606.b


This work supported by the New Jersey State Equine Initiative, the Rutgers Equine Science Center, and the New Jersey State Department of Agriculture.

Special thanks to Troy Joshua, USDA-NASS, New Jersey for help in setting up some of the surveys.

The authors are solely responsible for the content of these proceedings. The technical information does not necessarily reflect the official position of the sponsoring agencies or institutions represented by planning committee members, and inclusion and distribution herein does not constitute an endorsement of views expressed by the same. Printed materials included herein are not refereed publications. Citations should appear as follows. EXAMPLE: Authors. 2015. Title of presentation. Waste to Worth: Spreading Science and Solutions. Seattle, WA. March 31-April 3, 2015. URL of this page. Accessed on: today’s date.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.