The goal is to reduce the soil pH in your field.0, so if it is.5 then it would take 500 pounds per acre and if it is.0 it would take 1000 pounds per acre. It will take two to three years for the pH to be reduced and it may begin to rise five to six years after the initial application. Granular sulfur (SO4, 90 we applied the sulfur in the spring after pruning but it could be applied other times of the year, except if the ground is frozen, or if the soil is saturated with standing water or if the plant leaves are wet. . Applying it preemergence in the spring to pruned plants would have the least potential for any blueberry plant injury. Sulfur comes in the form of a pellet and looks like a small split pea and may be applied with a conventional fertilizer spreader. . It is important to get an even application of the sulfur, so an air assist spreader is the best way to apply it to your field. .
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This method will not control all weeds, as there are other weeds in you fields which are also resume well adapted to acid soils, but it will control many competitive weeds that reduce blueberry yield. In general it takes two to three years for the sulfur application to reduce the soil pH digital and it takes about 100 pounds of sulfur pellets to reduce the soil.1 units. There is a difference in the rate of reduction and length of time the pH was reduced. This is related to differences in the organic matter (OM) and the cation Exchange capacity (cec so that a soil sample on the field you want to treat is needed initially to determine your starting pH and over time to monitor its progress. The goal is to reduce the soil pH in you field to a pH.0. . you will have to monitor the soil pH on your field and may have to retreat with sulfur after six years to maintain the lower pH level. . so this treatment may be initially more expensive than an herbicide application but the effect is much more long lasting. The soil test is usually taken at the same time as leaf test samples, at tip-die back stage of blueberry growth in July of the non-crop year, but if you take the soil sample in the spring continue to take the sample at the same. take a random sample of 30 or more places in your field. . take a sample of the top three to four inches of soil, put it in a container and mix it well. . Send a sample of this soil to the soil testing lab and request pH only. .
Caution: do not apply more than 1000 lb/a of sulfur in any given year or thesis apply when ground is saturated or injury to blueberries could result. Sulfur is an effective treatment for reducing soil pH to control weeds in wild blueberry fields. In experiments conducted over thirteen locations in maine from 2000 to 2005, sulfur applied at 500 or 1000 pounds per acre was effective in reducing the soil pH one-half to one pH unit. . When the target level of.0 was reached we found a reduction in weeds, especially grasses and when used with the herbicides Sinbar or Velpar additional suppression was obtained by the sulfur. . The application of 1000 pounds per acre to an organic field reduced the pH from.0.0 and resulted in a decrease in weeds two years after the application. . The yields in the organic field were doubled by burning. Mowing and also doubled with the use of sulfur on the mowed areas, but when burning and sulfur application was combined the yield was increased by three fold. . The sulfur will reduce the availability of soil nutrients for the weeds but allows the blueberries to grow as well as at a higher pH because wild blueberries are well adapted to acid soil. .
Put mixed sample in soil box and send to: maine soil Testing Services 5722 deering Hall, orono, me (207) or 581-2934. Indicate it is wild blueberry soil and ask for pH only, the words cost is currently.00 (discounted price for blueberry growers only but is subject to change. Visit ml for costs of other sample tests. Analysis report will give recommendations on amounts of sulfur to reduce. Fields differ in organic matter and cation exchange capacity so pH change will vary from field to field. . Resampling the field each year is necessary to determine what change has occurred and to determine the need to apply more sulfur. Note : be sure and take leaf samples to determine your plants fertilizer needs, excess fertilizer will feed weeds and reduce your yields.
Revised and expanded December 2008. Wild blueberries are well adapted to a low pH environment. Reducing the pH in your soil gives the advantage to the wild blueberry over many weeds but will not suppress all weeds. Sulfur at approximately 100 lb/acre for a reduction.1 pH unit is less expensive than an herbicide. Change in pH may take several years to be completed. . Results take longer to obtain but last longer. Take 15 to 20 soil cores to a 3 to 6 inch depth. Be sure sample is a representative sample from all parts of your field, if field conditions are different take a separate sample.
How to Interpret your
Turnaround time soil sample analysis.5 working days after samples are setup received in the lab Plant, compost, greenhouse media and water analysis 4 to 5 working days after samples are received in the lab If samples are mailed allow time to and from the lab. Results of samples submitted through county extension offices are mailed first to the county agronomist or horticulturalist for comments or individualized recommendations. The county then mails the recommendations to the person submitting the sample. Soil test reports can be emailed on request at no charge or faxed for a nominal fee. Interpreting the results and recommendations of soil tests Interpretations and recommendations are based on the crops you select on the soil Information Forms. As recommendations differ for different crops, it is important you select the cropping options you intend to plant. The soil test results you receive will contain the following information: field information and sample id wallpapers you provided on the sample information form.
Soil test results pHs Phosphorus Potassium Calcium Magnesium Organic matter Netralizable acidity calculated cation exchange capacity Electrical conductivity If you requested zinc, manganese, iron, copper, sodium, nitrate, ammonium, or boron these results are also given. Suggested fertilizer requirements in pounds per acre for nitrogen (N phosphorus (P2O5 and potassium (K2o are given (zinc, and sulfur are also given if requested). Lime and magnesium treatments are based on soil test levels and crop options. Interpretations and recommendations Updated 9/15/17. 254, prepared by david. Yarborough, Extension Blueberry Specialist, The University of maine, orono, me 04469.
Each sample submitted to our lab should be accompanied by an information form. These forms should be filled out accurately for proper fertilizer recommendations. Including county names is essential for us to mail the soil test results to the appropriate area agronomist or horticulturalist. This information is important to determine the soil region and to complete the soil test summary report for the state. Samples from firms should contain the firm and outlet number for proper return of results and billing. Send the original form with the soil sample(s) and retain a copy for your records.
Send soil samples in proper containers such as the boxes and bags specifically designed for soil samples. (avoid glass jars, coffee cans, plastic bags, etc.) If samples are very wet, allow them to air dry for a day before mailing. Wet samples should not be sent in sample boxes that are plastic lined as they will not allow soil to dry during transit. Copy the serial number and field/sample id from the sample information form to the soil sample container. Garden, landscape and lawn soil sample information forms and sample boxes can be obtained from the county extension centers or at the soil testing labs free of charge or printed from the web. Garden, landscape and lawn soil sample information form (PDF) soil tests to request Regular fertility tests For a general analysis of a soil's fertility, a regular soil test package includes: ph neutralizable acidity Phosphorus Potassium Calcium Magnesium Organic matter Cation exchange capacity In certain cases. Micronutrients Zinc, iron, copper and manganese micronutrients may be desired in high pH soils Sulfur Sandy soils low in organic matter may have sulfur deficiency salt content (electrical conductivity) soils with salt problems should be tested for salt content (e.g. Salt or fertilizer spills, heavy applications of manure, irrigating with alkaline water, can lead to salt problems. Soil fertility analysis tests and fees see our charges.
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Soil and Plant Testing Laboratory 23 Mumford Hall, columbia, mo 65211, phone. Fax:, email: soil Testing Laboratory delta research Center. Box 160, portageville, mo 63873, phone. Fax:, note, samples submitted directly to the lab should be accompanied by a sample information form and a check for the amount due payable. Mu soil Testing, unless you have an account with. If you have an account with us fill in the firm and outlet number and we will bill you at the end of the month. We encourage you to submit your samples through the county extension offices. Firms or businesses may set up individual accounts with the lab to submit the samples directly.
Soil probes and augers are available through agriculture companies or your extension specialist may be able to help you locate a bartender supplier. You can use a shovel, however it is not as good as a probe or auger. If you use a shovel dig a hole to the proper depth, shave a 1-inch slice from the side of the hole, save the vertical, 1-inch wide center portion of this slice. Sample from uniform areas. Avoid known soil differences (soil color, texture, slope, limestone, fertilizer, manure) in composite samples - sample them separately. Garden or landscape soil 0 to 7 inches 8 to 10 separate cores samples. Lawn soil 4 to 6 inches 6 to 10 random subsamples, mix samples to obtain one composite sample in a clean plastic pail (metal pails contaminate the soil with micronutrients) and retain one pint (MU soil sample box full). Where to submit soil samples, county extension centers (preferred method).
they reduce back strain. A power drill facilitates sampling in rocky or dry soils. Use a plastic container with a hole in the middle to collect the soil as the auger pulls it out of the ground. Empty the soil out of the plastic container into the soil sample bucket after each successful attempt to get a 6-inch core. A well taken soil sample results in appropriate recommended rates of fertilizer and limestone. A soil coring device such as a probe or auger works best to sample soil, because these tools equally collect soil from surface through the entire sampling depth.
Ideally, garden soil is sampled between crops such that corrective fertilizer and lime applications an be made before the next season. Although most people take samples in spring, this is the time when our laboratories and county offices are overloaded with samples. A delay in the return the of results may occur. Fall or winter sampling leaves more time for planning and corrective fertilizer management. How to take a soil sample. Obtaining a 6- to 7-inch core for soil sampling. Discard organic duff on top of soil.
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Plants for which recommendations are given. Fertilizer and lime recommendations are provided according to the following groups: Annual flowers and vegetables, cool season turf grasses (bluegrass, fescue, or rye). Warm season grasses (zoysiagrass, bermudagrass, or buffalo grass). For both groups of turf grasses, either a moderate or high maintenance fertilizer program may be chosen. If you want recommendations for an individual plant (perennials, vegetables, flowers, fruits, or landscape plants) on the horticulture form check other and write the name of the plant in the blank provided. Garden, landscape and lawn soil sample information form. When to sample, from the perspective of nutrient availability soil can be sampled any time of the year, as nutrient levels vary only slightly from season to season. A small statement decrease in exchangeable potassium may occur following a productive harvest, yet difference is unlikely to affect fertilizer recommendations.