Latest News From Mark Z. Johnson

Addressing Calf Scours with Pasture Management

A management plan using clean calving pastures can help prevent direct contact between older calves and younger calves and minimize the potential for sickness to occur.

Calf Scours and Calving Pasture Rotation

Calf scours results in sickness, poor performance, medical expenses and death. Here's a look at the complex disease and one management method found to decrease and even prevent transmission.

Forage Budgeting with Non-Traditional Sources of Hay

Determining how much forage cows will eat on a per day and per month basis for the duration of winter always requires a little “cowboy math”.

What's A Good Bull Worth?

Determining the value of a bull is an important question, and one that is a challenge to answer. Mark Johnson, DVM, Oklahoma State, offers some calculations to help determine a value.

Act Now To Add Value To Weaned Calves

Producers can capture added value by preconditioning and weaning their calves. Along with weaning at least 45 days, preconditioning includes several practices that add value for both the buyer and seller.

Creep Grazing Offers Benefits

Creep grazing programs can produce additional calf gains using forage rather than the traditional grain-based creep diets. There are many ways to adapt this system to each individual situation.

Benefits of Estrus Synchronization and Artificial Insemination

Estrus synchronization can be an important management tool to get cows settled as early in the breeding season as possible and get cows bred to bulls with highest possible genetic value.

Estrus Synchronization and Artificial Insemination in Beef Cows

For an estrus synchronization program to be effectively implemented it needs to be well planned.  Several best management practices should be kept in mind if you are considering heat synchronization. 

Feed Cows at Night to Produce More Calves in Daylight

Calving during daylight means calves are born during times of warmer temperatures, cows calving are easier to find and provide assistance if needed and accordingly, more calves saved and alive

The Importance of Colostrum

Colostrum plays a large role in the health of a newborn calf. Preparing for calving season starts well before the first calf hits the ground.

Preparing Cows for Winter and Spring Calving

Reproductive efficiency is highly correlated to nutrition. The target Body Condition Score going into calving season is 5.5 for the mature cow and 6 for first calf heifers.

Management Practices for Cows at Weaning (Part 1)

Weaning is time to focus time and management on ways to eliminate stress, maintain health and maximize the value of weaned calves, but also a critical time to manage the cow herd.

Fall Calving in Hot Weather

Early fall calving herds face a challenge from the high temperatures of late summer. The primary challenge is the impact those temperatures can have on newborn and young calves.

Bull Management After the Breeding Season

In most spring calving herds, the breeding season begins in the spring or early summer. Maintaining a 60- to 90-day breeding season can be one of the most important management tools for cow-calf producers.

Selection for Maternal Performance

This week we discuss the EPDs to consider when selecting bulls that will be used as rotational sires. A rotational sire is a bull from which daughters will be retained to develop as replacements in our cowherd.

Genetic Prediction in Beef Cattle and Expected Progeny Differences

EPDs are the result of genetic prediction, based on performance data collected by cattle breeders over many generations of beef production.

Invest in Genetics to Maximize Your Profit Potential

Breeding season is just around the corner and it’s time to consider your investment in genetics to maximize the profit potential of the calves that will be born next year.