- Agronomic: corn, Velvet Beans
- Animals: bovine
- Animal Production: grazing management
Three acres were planted with corn and climbing beans in mid April, 2017. Dixie 20 was used in 2016, however, this variety was not available locally in 2017. Because a roundup ready variety was not necessary, a non-Roundup Ready Pioneer variety was used. Velvet bean seed were ordered from Petcher Seeds in Alabama. Based on recommendations from Dr. Petcher, corn was planted on every row and every other row had velvet beans interplanted with the corn. This was done using Cole planters with dual hoppers. Rows were on a 36" spacing. Fertilizer was applied at the recommended rate for corn. The field was cultivated once for weed control. After the corn was about 18" tall, ammonium nitrate was applied at the recommended rate and the stand was "laid by".
Although there were periods of drought during the summer months the corn and beans developed well and never did wilt. In 2016, lab lab seed was used because velvet bean seed was scarce. The lab lab did not flower until right before frost and never produced seed. The velvet beans did not begin flowering until October. Although a decent amount of seed pods were produced, they did not have adequate time to dry on the vine before the first frost. Because of this, many pods showed signs of deteriation by mid winter (see photo at left).
Ten head of beef cattle with calves along with three goats were strip/limit grazed on the plot beginning on November 15. This was approximately two weeks later than the start of grazing in 2016. Each week, the strip wire was moved up approximately 10 yards. By limit grazing, the animals were able to graze the plot until early February. Cattle were fed their normal ration of free access bermudagrass hay during this time. Based on body condition, no supplemental feed was necessary until late December. Around December 27, cattle were given three pounds/head/day of 12% protein beef ration.
I first got the idea for this project after talking with several people who grew up on farms prior to World War II. These men indicated that grazing corn and velvet beans were a regular part of the farming operations in the South at that time. With a move to find more sustainable methods of production, I felt that this "older" method needed to be revisited. I wanted to find if this method were especially applicable for small producers such as myself who lacked time as well as feed storage facilities.
The first objective was to determine how many hours of labor were needed to strip graze cattle on corn/climbing beans and how does this compare with the amount of labor to purchase and feed commercial feed. I found that by grazing the corn and beans, my labor was decreased during November and December. Grazing the corn and beans reduced the amount of hay fed during this time and no supplementation was given until nearly the end of December. I would estimate that 1-2 hours/per week were saved during this time.During January, there was no significant reduction in labor as supplemental feeding was done during this month. I found that the results from 2017 were similar for this objective to the results of 2016.
The second objective was to make a cost comparison between the corn/climbing beans versus traditional hay and supplementation. Looking at only hay and supplemental feed, the winter cost per cow decreased by approximately 50% by utilizing the corn and beans. This was due to a decrease in the amount of hay and supplemental feed needed. However, when the cost of planting and growing the corn/beans is factored in, the winter cost/cow was about the same.
The third objective was to determine how much nitrogen was added back to the soil after the first season. Obtaining soil tests for this has been problematic and at this time, results are still pending.
The fourth objective of the study was to determine if grazing standing corn and climbing beans would maintain body condition on the cattle. The results for 2017 were better than 2016. Three of the cattle in the 2017 were first-time heifers which was similar to the makeup in 2016. However, these heifers did not calve until late December and that could account for better body condition overall. Although the cattle did not improve in body condition, average body condition was nearly maintained during the entire period of the study. On average, the herd only decreased 1 point on the body condition score. Of the ten cattle utilized for the study, only two had more than a 1 point decrease in body condition.