Sandy Johnson, livestock specialist

In years with ample rainfall, there may be a tendency to take grass production for granted. If there are so many acres, we expect it to produce so much grass and run so many head of cattle. Putting up hay or even mowing the lawn (non-irrigated) can give us a good indication of forage growth conditions in general. When dry conditions prevail, the normal grazing plan must be changed; and it can be hard for producers to make timely changes for several reasons. Enacting a “plan B” is generally expensive, time consuming, and otherwise unappealing. Some objective measure of grass production would likely help producers make more timely decisions.

Forage use must be measured so it can be managed. Basic yearly records to keep on each pasture include: date of turnout, number of head, average weight, same three points at the time of removal, and rainfall. The other record needed is some measure of utilization at the end of the season. This could be as simple as a light (1 – 33 percent), moderate (34 – 66 percent) or heavy (67 – 100 percent) estimate of forage utilized, based on a comparison to an un-grazed area. A grazing exclosure (area within pasture that is excluded from grazing) is a useful tool to compare how much has grown in comparison to how much is remaining in the pasture. Two steel posts and a wire panel tied in a circle makes an easy and effective grazing exclosure. In dry years, it is last year’s un-utilized portion that supplements the current dry year’s growth, protects the soil surface and improves infiltration when it does rain.

A grazing stick is another tool to measure forage production. It was originally developed for use in higher rainfall areas and monoculture pastures but can be adapted to other regions. The use of a grazing stick is dependent on appropriate local or regional calibration that reflects the leaf density of the pasture. Height of the forage in inches is converted to pounds of production per acre. Complete online directions of how to calibrate and use a grazing stick can be found at this site from the Noble Foundation http://www.noble.org/ag/forage/grazingstick/index.html. A minimum of 400-800 pounds per acre should be remaining after grazing in short grass regions.

Another method to measure utilization is quoted below and comes from a Nebraska and South Dakota resource entitled “Drought Management on Range and Pastureland: A Handbook for Nebraska and South Dakota.” This publication contains lots of good range management information that easily translates to western Kansas. Don’t let the title make you think it doesn’t apply, because if you are not in a drought, you are just preparing for the next one.

“Proper utilization during the growing season is generally the removal of 50 percent or less of the present, current year leaf and stem tissue by weight. A simple procedure can be used to develop a visual perception of percentage forage utilization. Clip the current year growth from random bunches or tillers at the ground level. Wrap the samples with string or tape. Balance the sample on your finger. The point of balance is the height at which 50 percent of the leaf and stem material would be removed. Clip the sample at this point and balance each half to estimate heights for 25 and 75 percent utilization. Since utilization often differs across the pasture, you will need to monitor average height of utilization throughout each pasture. Estimates of the stubble height at which a target level of utilization will occur should be made when the cattle enter each pasture.”

Take time at the end of the grazing season to evaluate the amount of grass utilized in relationship to the rainfall received and growing conditions. This will help build a good grazing management plan that can take advantage of additional growth when conditions improve and provides specific guidance when needed rains do not come.

Larry Hollis, Extension Beef Specialist
Reprinted from www.asi.ksu.edu/beeftips

With the hot, dry Summer currently being experienced in many parts of Kansas, traditional weaning plans may need to be significantly altered. Cows are out of grass in many areas, and grass is extremely short in others. Early weaning of calves should be strongly considered. Considerable research has shown that it is a much better use of resources to wean the calf early, and either sell or feed the calf, than try to feed the cow enough to sustain lactation through a drought. Doing this will hold feed costs down both now and this Winter when you are trying to get cows in condition to (1) survive the Winter, (2) calve successfully, and (3) be in reasonable body condition score (BCS) to breed back next year. Many cows may be close to drying up on their own because of the lack of feed, so the primary thing they may be providing is merely companionship for the calf.

Consider these factors when early weaning.

• Water. Freshly weaned calves need plenty of fresh, clean water, especially if weaned during the heat of summer. Hopefully they have had access to water alongside their mothers, but if their mothers are drinking from an elevated tank or tub that calves cannot reach, they may need to be provided with a readily-available, closer-to-the-ground water source so that they are trained to drink from it prior to actual weaning time.

• Weaning method. Research has shown that “soft” weaning methods such as fence line weaning or nose clip weaning result in better maintenance of existing calf weights or subsequent calf performance than traditional “hard” weaning methods (abruptly separating cows and calves and placing calves in a drylot or unfamiliar pasture situation). When calves are weaned with either soft method, calves have the benefit of knowing their way around the pasture, including where shade, water and feed are located. If facilities permit (calf-proof fences between 2 adjoining pastures), fence line weaning is preferable over nose clip weaning because it does not require running calves through the chute twice to install and remove the nose clips. Hard weaning methods always result in greater calf weight losses than soft methods. Also, hard weaning, especially when calves are weaned in dry, dusty pens, almost always results in more respiratory health problems.

• Vaccination program. If some of the better calves need to be held for replacements, or calves are typically marketed through a value-added preconditioning program or marketing system, they will benefit from the same preconditioning and vaccination program that would be utilized if they were held until normal Fall weaning time. Feeding programs following weaning need to be adjusted to meet the needs of these lighter calves. When processing calves during the hot Summer, be careful to make sure that vaccines are handled properly, because heat can spoil vaccines rapidly if they are not kept refrigerated during transit and chuteside while working calves. If modified live virus vaccines are used, it is imperative that they also be protected from sunlight. Over 60% of viral particles in the bottle or syringe will be inactivated by only 1 hour of exposure to sunlight. Keeping the vaccine bottles and syringes in a cooler except when animals are actually being injected will help protect the product from both heat and sunlight.

• Working cattle. Try to gather cattle into loose grass traps or large pens near the working facility where they have plenty of space prior to
being worked. If possible, this should be done the evening before working the cattle. Try to have all work completed by 10:00 in the morning. Also, fresh water needs to be available both before and soon after working through the chute.

We can’t escape an occasional drought, but we can manage our way around them and reduce their negative impact. With a little advance planning, early weaning can be accomplished and the herd set up to recover more quickly once it finally starts raining again.