Previous Research Resources

For Wildlife Managers

Mule Deer

Sightability Model for Elk & Mule Deer

Understanding mule deer behavior and habitat should increase our success mule deer management. Information on mule deer is limited due to difficulties and expense of research. Below is a list of information and publications that are available.

General Information

For Livestock Producers

Club and Market Goats

Pictures of Goats
NMSU Corona Club and Market Goats
market goats images

SAMM Cross Lambs

CRLRC SAMMX Breeding Program

The Corona Range and Livestock Research Center (CRLC) began investigating the possibility of crossbreeding the SAMM (South African Meat Marino) with our traditional Western Whiteface flock on the ranch in 2006. During the winters of 2007 and 2008, a select few ewes were Alfed to Prime SAMM semen originating in Australia.

In 2009, an additional select few ewes were mated to half-SAMM bucks from prior All. Late Fall of 2009, two full SAMM rams were purchased from Kitzan's in South Dakota to diversify CRLRC SAMM genetics, CRLRC SAMM crosses are entirely range born and reared. Due to serve drought across the southwest only a small group of SAMM cross lambs have been performance tested to date.

Twenty-two 1/4 SAMM and Ten commercial Rambouillet rams were retained during our 2013 weaning held on range through January, then developed on a 84 day dry-lot performance test, then native pasture from April until now. These rams are available now for purchase at the ranch now through fall.

Shad Cox
P.O. Box 392
Corona, NM 88318
Phone: 575-849-1015
Cell: 575-799-3569
Fax: 575-849-1021

Forage Analysis

CRLRC Forage Analysis Results

18 Year Summary of Diet Sampling Analysis

Forage analysis is an integral part of a range nutrition program. Knowing what your cows are getting from grazing the range helps to develop your supplementation program. Ranchers can take forage samples from pastures at different seasons and send to a lab for analysis of all nutritional parameters and mineral content of the sample. The CRLRC sends forage samples throughout the year for analysis for reference. Additionally, the ranch has the capability to utilize ruminally cannulated cows and heifers to take an actual diet sample from the animal. A rumen cannula is a surgically applied access port into the stomach of the cow. We remove all of the rumen content from each cow, then allow them to graze for a period of time, then take the forage that the cow grazed during the time as a representative sample in time, and finally we add back all of the rumen content we removed so that the cow is not effected by the procedure. This is the best sample that can be taken from the range because the cow actually sampled the range for us. A forage sample is just your or my guess at what the cow may eat and may not be what the cow picks. An interesting note, we have taken dozens of samples of dormant range that we could not see any green forage, however when the cow is sampled they always have located green feed that we would not have sampled if taking the forage sample ourselves.

Below are graphs representing the summary of 18 years of diet sample analysis by month of the year. Each graph represents the highest, lowest and average results obtained during analysis of diet samples.

Summary: 18 Year CP Analysis
Summary: 18 Year CP Analysis
Summary: 18 Years Forage TDN
Summary: 18 Years Forage TDN
Summary: 18 Years Forage NDF
Summary: 18 Years Forage NDF

New Mexico Forage Mineral Survey (2004)

An extensive forage mineral study was published by Clay Mathis and Jason Sawyer in 2004. The intent of the study was to quantify amounts of measured minerals and differences within the state of New Mexico. The published manuscript is available below, as well as, I have included the published tables below for quick reference.

Statewide Forage Mineral Survey
Image of Table 1
Image of Table 3
Image of Table 4

Livestock Water Analysis

Livestock water is an important component of any nutritional program. Until you know what is in the water that your cattle or sheep are drinking everyday, you do not have a true handle on your supplemental nutrition program.

Here in Central NM we have enough salt in our water that we really do not need to supplement with plain salt. We still use salt in our cubes and mineral, but basically for increasing consumption of both (palatability) and with higher rates we can also limit consumption of our loose mineral to control intake to appropriate levels. Further problems caused by our water is the high total disolved solids (TDS), that along with other high mineral content in the water, increases our risk of water belly (urinary calculi). We have to add ammonium chloride to our mineral if we over-winter steer calves, and we know this by looking at the water analysis, and from prior experience of water belly in steers on the ranch and others in the area. Further note, is a high sulphur content in our water. With an increase in use of higher sulphur containing alternative feed byproducts in cubes and rations, the stage may be set for instances of Polio-encephalomyelitis. I have seen two instances this year, one on the ranch and the other at a ranch to the north. High sulphur consumption can disturb thiamin metabolism causing a disturbance in the brain, leading to blindness, lethargic reactions, aimless walking, head pressing, etc. and eventually death. These are just a few reactions with water intake that come to mind that can be identified by analyzing water on the ranch.

Testing Water Sources

It is a great idea to have your water sources tested. This can be done in a number of ways, however the easiest would be to contact your county agent. They will be able to provide you with all the information and probably give you a testing kit. Also, when analysis is complete they have all the resources available to give you the proper results with indications of any concerns that might be present with the results.

Most of us have taken water samples at wells or the end of a garden hose off of the house well, however one source that may not come to mind would be storage tanks that have set all season without use, we just keep filling them up for the deer pronghorn. Evaporation during a season of little use will concentrate most minerals two and three fold. This could possibly cause a toxic event when turning livestock onto the water for the first time after setting and evaporating for a time. I have starting thinking back to the few instances where I blamed a poisonous plant for a death after moving to new pasture, but know I wonder if concentrated minerals, such as sulphur, was the culprit. If you know you have a high level of some mineral, testing the storage for concentrated levels might be a good idea, or flushing the tank and refilling would also be a good idea.

General Information

CRLRC Well Water Analysis

Image of Water Analysis


Mineral Nutrition & Supplementation

Mineral nutrition can be complex. Consumption of mineral is the sum of vegetation, soil, water and supplement intake. Concentration of minerals in the diet and diet requirements fluctuates throughout the year. Designing a simple, yet easy to manage mineral program that succeeds may involve on the ranch testing for a couple of years. The form of ALL of these factors add to the challenges in formulating an effective mineral supplement.

Mineral Supplementation

Corona Ranch Mineral
Image of cow consuming CRLRC "Corona Ranch" Mineral
Self fed, self limiting mineral supplement
  • New Mexico Forage Mineral Survey (PDF)
    An extensive statewide forage mineral study published by Clay Mathis and Jason Sawyer in 2004. The intent of the study was to quantify amounts of measured minerals and differences within the state of New Mexico.


Range Beef Cow Supplementation Information & Strategies

Range beef cattle production depends on the nutritional quality and quantity of available forage species. Winter and early spring months typically provide the least availability of high quality or nutritionally dense forage. During this time period on most operations, cows are expected to provide nutrients to the developing fetus during pregnancy, produce milk for a new calf after calving, and maintain or increase her physiological status during the postpartum period in order to conceive for the next production cycle.

Ongoing research projects are designed to profile the nutritional physiology involved in range beef cattle production, as well as developing new feeds and feeding strategies to supplement cattle during times of nutritional stress at an economical advantage. Currently there are four areas of special interest: Replacement heifer development, young cow post-partum supplementation, mature cow supplementation alternatives, and weaned calf management strategies.

Below are links to published general information, as well as, result driven publications derived from 20 years of research conducted on the Corona Range and Livestock Research Center.

Range Beef Cow Nutrition

General Information

  • Beef Cow Supplement Decision Guide
    A great yes/no decision tree in a flowchart format. With three questions this guide can help assist in your decision to start or continue with supplementation and gives suggestions as to what level of protein and what rate fed. (Courtesy of Dr. Clay Mathis, NMSU Extension Livestock Specialist)

Weaning Range Beef Calves In the Southwest

The fall of the year is the most important period of the year financially for the Southwest rancher. Many decisions have to be made concerning the years calf crop and how to market, vaccinate, wean and ship these calves. Below are sources of information from the CRLRC, as well as, other sources.

Weaning Beef Calves

General Information

Herd Health

Herd health is an important program area for the ranch to maintain. Below is information regarding health as related to the Southwest rancher.

The CRLRC Health Management Strategy

Below are the CRLRC Yearly Health Schedules for cow, replacement heifers, bulls and calves. These are working documents have have changed each year in the last eight years. These are by no means a cure all to health problems in your herd. They are only available for reference because of requests from producers in the state. Our schedule has been built to fit into our working days to minimize labor and time, while increasing our risk management. They have been developed by our veterinarian's based on our needs and perceived risks of exposure. Please consult your veterinarian to insure that your program is the best fit for your scenario and that no complications arise. (Using a live or modified live viral vaccine has risks of pregnancy complications if not timed correctly during the first administration). Please feel free to contact the CRLRC if you have any questions about our program.

General Information

  • Subcutaneous Injection Knots
    We have all seen our cows and calves with unsightly knots on there necks from 7-way (blackleg) vaccination and many have tried to use this excuse for a lower price. A study has shown that these knots may indicate better immunity and resistance. (Aggie Notes Column, NMSU)

Poisonous plants continuously cause lowered production and/or cause death to livestock grazing New Mexico rangelands each year. Below are links to information available for producers that might help identify the cause and help gather information to ease the burden while managing through times of toxic episodes.

Plant Identification

  • NRCS Plants Database
    The most comprehensive online resource for information on individual plants by common or scientific name.
  • NMSU Range Science Herbarium
    The NMSU Department of Animal and Range Sciences maintains a range plant herbarium in Knox Hall on the main campus. The website maintained by the herbarium has useful information and publications, many in downloadable format.

Specific Plant Publications

Sheep Production and Management

Image of two range ewes with newborn lambs

CRLRC Research

The New Mexico Cooperative Extension Service maintains a website for Sheep Production and Management. Click on the link below to access the site.

For Rangeland Managers

Grazing Management

  • In Riparian Areas in New Mexico. A summary of options that can be implemented to manipulate riparian use.

Solar Water Pumping Information

  • Designing Solar Water Pumping Systems for Livestock (Workbook)
    This link will download an Excel workbook titled Designing Solar Water Pumping Systems for Livestock from NMSU Cooperative Extension Service. This workbook will take you step by step in designing a functional solar water pump system, showing equipment needed and estimating costs. The above user manual is a step by step guide for this workbook.

Brush Control

Encroachment of piñon-juniper woodland and other brush species can have a detrimental effect on many facets of land management. Decreased forage production, increased erosion, lowered net income and fire hazard, to name a few. Below are links to information reported from research conducted here at the CRLRC, as well as, publications published by NMSU Cooperative Extension Service and the Agricultural Experimental Station.

Noxious Weeds

Noxious weeds seem to give us problems year after year. We have problems when we are in a drought and problems when it rains. Below are some links to publications dealing with a number of noxious weeds.

General Information

  • Circular 698: Troublesome Weeds of New Mexico
    An excellent publication from NMSU Cooperative Extension Service with excellent pictures and information on common weeds. This is a large download of 16.31 MB, so it may take some time to download. Be sure to save for future reference to avoid further downloads.

Rangeland Economics

As we enter a new era in rangeland livestock production with escalating costs in all areas of production, it becomes more evident that rangeland managers and range livestock producers need new tools in evaluating operations. Below you will find information from the CRLRC as well as other meaningful information conducted or analyzed throughout the U.S.

Flora of the CRLRC

An extensive inventory of the flora found on the Corona Range and Livestock Research Center was taken in 1999 and 2000. Plant images are arranged below alphabetically by genus and species.

Related Publications

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