Cows in pasture

Fall Pasture Management Tips

November 01, 2020 Written by Susan Garey

While summer may be over and the main grazing season concluded, the fall is one of the best times of the year to evaluate the condition of pasture and complete some pasture management tasks. Time spent now will pay dividends in the spring.

  1. Soil Test- After a summer of grazing, fall is a great time to take soil samples to check on soil pH, nitrogen, phosphorus and potassium. This is important information to have when making management decisions such as how much fertilizer or lime to apply. Soil tests enable accurate application, avoiding over application which can have negative environmental impacts and also result in unnecessary spending. Testing should be done routinely every 2-3 years or prior to undertaking a partial or full pasture renovation.

  2. Assess- Producers should routinely walk through pastures. Observe and inventory what desirable pasture species are present, the ratio of grass to legumes, the types of weeds present, the stage of maturity of desirable species and weeds, the amount of bare soil present and possibly use a compaction meter to measure potential soil compaction levels as a result of hoof pressure following the wet growing season.

  3. Weed Control- The fall is an ideal time to do some weed control. Perennial weeds such as horse nettle, dogbane and thistle respond well to fall herbicide applications because they are translocating energy to store in their roots in preparation for overwintering. Herbicides should be applied according to label instructions and prior to the first frost.

  4. Lime- Based on soil test results, apply lime in quantities to increase soil pH appropriately. Over time without the application of lime, soils generally become more acidic. The addition of certain fertilizers such as ammonium sulfate can also make soil more acidic. Acidic soils make nutrients less available for pasture species to uptake. Most pasture species prefer a soil pH between 6.0-6.5. Raising soil pH not only makes nutrients more available to pasture grasses and legumes for uptake but can also make soil bacteria more active which helps to release nutrients. Based on soil test results the application of either high calcium lime or high magnesium (high mag) lime may be needed. Additional recommendations for liming pastures can be found in our nutrient recommendation guide.

  5. Fertilize- Based on your soil test results, apply nitrogen (N), phosphorus (P) and potassium (K) as needed. Soil test results allow application of correct amounts of fertilizer needed which saves money and avoids over application. Fall is widely recognized as one of the best times to apply fertilizer. Fall applications of fertilizer helps pasture stands to be hardier, overwinter better and be more productive in the spring. Phosphorus helps with root growth and development which in turn has a positive impact on pasture persistence and longevity of a stand. Potassium functions much like anti-freeze in a plant and assists it in coping with hot dry or extremely cold weather. Nitrogen provides for leaf growth and development and fall applications of nitrogen help boost pasture production the following spring. Fall applications should be completed by early November. Remember that Delaware nutrient management laws do not permit commercial fertilizers to be applied between December 7 and February 15. Additional recommendations for fertilizing pastures can be found in our nutrient recommendation guide.

  6. Mow/Drag- Mowing pastures promotes more even growth after a summer of grazing and can assist in weed control by clipping weed seed heads before they are viable. Pastures should be mowed no shorter than 3-4 inches to allow enough residual plant material for pasture species to store energy reserves for the winter. Dragging a pasture spreads manure more evenly then a cow or horse will. It also offers some benefit for internal parasite control by exposing parasites and their eggs to sunlight and desiccation or drying.

  7. Rotationally Graze or Strip Graze- Overgrazing at this time of the year is detrimental to the persistence of a perennial pasture stand over the winter and negatively impacts spring pasture growth. Develop a grazing plan based on your visual evaluation of your pastures to sufficiently rest and rotate your pastures. Divide your pastures into smaller areas to reduce selectivity and force animals to graze more evenly if you find that forage is becoming too mature and being wasted in some areas of your field and overgrazed in others. 
    Pastures should never be grazed less than 3-4 inches as it causes stress to the plant because they begin to use their root reserves instead of using their leaf material to produce more energy for growth. If a pasture is continuously overgrazed eventually the desirable pasture species utilize all of their root reserves causing them to die and leave bare spots in the pasture. Rotational grazing gives pastures a must needed rest in between episodes of grazing. The length of time regrowth between grazing episodes is dependent on environmental growth conditions. Strip grazing is a type of rotational grazing and is a great technique for rationing pasture during times of less growth such as winter months. Animals are offered a portion of a field to graze and then are moved on a regular basis once that area is consumed. This is generally high intensity grazing for shorter periods of time.

  8. Overseed/Reseed- Fall is the best time of the year to reseed a pasture. Seed germinates faster as soil temperatures are warmer than in spring. Pasture seedlings get several months of a head start on spring weed growth which makes them able to better compete in the stand. If the existing stand simply needs thickening, then overseeding is a good option. If soil pH and fertility need dramatic adjustments, soil compaction is severe, weed pressure is heavy and desirable pasture species are thin then a full renovation with conventional tillage is probably in order.
    A common mistake is grazing newly renovated pastures too soon. Plants need time for strong root development so they aren’t pulled out by grazing animals or damaged by hooves. Full renovations require a good year of careful mowing, etc. prior to grazing animals being turned out. If you do not have the room to wait a full year, but still need a full renovation, consider breaking apasture into sections, seeding one section per year. This way, the new section will be ready for animals as you prepare to renovate the next section the following year. This also helps spread the renovation cost over time.

  9. Stockpile-Tall fescue grass pastures offer the ability to stockpile or grow forage and store it in the field to be grazed in late fall or winter. Tall fescue is uniquely suited to this practice as it maintains nutritional content and increases in palatability after the first frost. In KY31 TF stands, the level of endophyte infection actually decreases as the winter progresses. In order to stockpile tall fescue in the field for later grazing, an early fall application of nitrogen to stimulate leaf growth is necessary. Wait to graze until late fall or winter and consider utilizing strip grazing to maximize the utilization of stockpiled tall fescue.

  10. Choose the Right Forage Species- This is one of the most costly inputs for pasture, and is also the most important choice for pastures. Unfortunately, Delaware does not share the same climate as Pennsylvania, Kentucky, or Western Virginia, which provide excellent conditions for perennial, cool season grasses. Our warm, humid environment tends to stress cool season grasses during the summer months, reducing the longevity of some species such as orchardgrass, timothy, and perennial ryegrass. There is an exception-tall fescue, particularly varieties containing the friendly (novel) endophyte, which tend to persist much longer when established correctly. Please note these are different than endophyte-free varieties, which tend to have less vigor. There are many pasture mixes available on the market so  be familiar with what is in the mix you are being sold or consider a custom mix of appropriate species for our growing conditions.

 

In conclusion, fall is a great time to evaluate the past grazing season. Think back- did you have times where pasture growth was in excess of what was being utilized by grazing animals? A time of deficiency? How can you overcome those times in the future? What did your pasture look like by the end of the summer?

Often times when asked to make recommendations to help producers manage their pastures more effectively, we discover that pastures are greatly overstocked and continuously grazed. Even when following good management practices, pastures that are overstocked will result in overgrazed, damaged stands that do not persist. Weeds are opportunists and bare soil allows them to germinate from existing soil reserves or propagate if they are not controlled. If you do not already have one, consider establishing a sacrifice lot or a place to put animals and feed hay when pastures cannot be grazed for a variety of reasons (too wet, too dry/droughty, no growth, when a pasture has been recently seeded or fertilized, or it is too cold and limiting growth rates). This practice will help extend the useful lifetime of pastures. Hoof pressure on wet pastures in the winter damage the desirable plants and result in soil compaction. Pastures that are grazed year round are less productive and need to be reseeded more often


Related News

  • Time to Check-in

    December 02, 2024 | Written by Fontella Taylor-Martin, Extension Agent, 4-H Youth Development Grant Manager
    As we approach the holidays and come to grips with closing yet another year, it is critical to check in with ourselves and reset our mental health. This time of year, daily tasks are potentially stressful and overwhelming. From the chaos of shopping, cooking, and baking; to the stress of travel, decorating, and spending time with friends and family – we can become exhausted just thinking about our pending list of responsibilities.
  • Healthy Communities, Healthy Residents

    November 14, 2024 | Written by Gina Crist, Community Health Specialist - Health & Well-being Program Leader
    A person’s health is determined by more than just the decisions that they make. Did you know that some of the largest drivers of whether or not someone can be as healthy as possible are actually determined by the societal factors in their community and environments that surround them where they live, learn, work, play and pray?
  • Delaware Cooperative Extension celebrates 2024 Friends of Extension

    November 12, 2024 | Written by Michele Walfred, Communication Specialist
    Each year, Delaware Cooperative Extension, as the land-grant outreach arm for University of Delaware and Delaware State University recognizes local individuals and organizations with the Friends of Extension Award for outstanding service in support of a united outreach effort. The 2024 honorees were announced at Delaware Cooperative Extension’s annual conference held on Oct. 29 at the Modern Maturity Center in Dover.
View all news

Events