Fall nitrogen blitz

Fall nitrogen blitz DEFAULT

Great Bend Region Spring 2012 Sampling Blitz

Volunteers sampled 206 stream sites on Friday, April 13th between 3 and 5 p.m.  Results of their efforts are presented below.

Temperature - Samplers measured temperature in the field directly from the stream at the time of sample collection. Temperature is an important parameter as it is the regulator for aquatic communities - all plankton, bug, and fish species have a preferred temperature. Temperature also controls the amount of dissolved oxygen present in the water - cooler temperature waters hold more dissolved oxygen. Finally, temperature controls the rate at which chemical reactions occur, such as the conversion of nitrate-nitrogen to ammonia-nitrogen. Higher temperatures are shown in darker colors. Several factors affect temperature including riparian buffers or shading, watershed inputs, and surrounding land uses. Temperatures typically measured higher than those measured during previous spring sampling events – measuring nearly as high in headwater streams as those temperatures measured during the most recent fall sampling blitz. Highest temperatures were measured in the headwater streams and in the Wabash River.

pH - Samplers measured pH from water samples at the staging location. Water pH is a measure of the amount of hydrogen ion available in the water. Water pH determines the solubility and biological availability of chemicals, including nutrients such as nitrogen and phosphorus, and metals, like copper or lead. Typical pH levels in streams measure between 6.5 and 8.5. pH levels are indicative of the geological materials in the drainage area. Additionally, the amount of photosynthesis occurring in the stream can affect pH levels. Higher pH levels are shown in darker colors, while lower pH levels are displayed in lighter colors. pH levels below 6 are of concern for biotic communities. Further observation is necessary in those tributaries where low pH levels were measured.

Transparency - Samplers measured water transparency using transparency tubes. Water transparency in streams reflects the distance downstream that you can see through the water. Tubes measured 114 centimeters, so any values greater than 114 centimeters exceed our ability to detect a change in water transparency. Low numbers (10 cm) indicate poor transparency while those in the 70 centimeter (2 foot) range indicate good transparency. Lower transparencies were typically measured in small headwater streams throughout the Region of the Great Bend of the Wabash River.

Nitrate/Nitrite - Nitrate-nitrogen and nitrite-nitrogen, like orthophosphate, represent the available nitrogen in an aquatic system. Nitrogen is also available in the atmosphere and can move from the air into the water by nitrogen-fixers. Nitrogen can readily convert between different forms, especially nitrate and nitrite. Conversion to and from ammonia also occurs when dissolved oxygen is available in the system. Nitrate and nitrite concentrations are displayed below with darker colors representing higher concentrations. Nitrate-nitrogen concentrations measuring higher than 2 ppm can inhibit aquatic communities. Concentrations higher than 10 ppm violate the state water quality standards. As previously observed, nitrate concentrations measured much higher during the Spring sampling than those measured during the Fall sampling events.

E. coli - E. coli is an indicator organism used to monitor pathogen concentrations with surface waters. E. coli is present in the intestines of all warm-blooded mammals and can survive and reproduce outside of the body. Untreated sewage, combined sewer overflows, polluted discharges, input from animals, and source populations can all contribute E. coli to surface waters. In Indiana, concentrations measuring greater than 235 colonies/100 mL are deemed non-supporting of their designated use. Those watersheds which do not meet water quality standards are shown in darker colors.

Back to Blitz

Sours: http://www.wabashriver.net/spring-2012-sampling-blitz/

In addition to collecting water samples and conducting field measurements,Q4 Water Sample Blitz volunteers also conducted QHEI assessments.  The Qualitative Habitat Evaluation Index (QHEI) is a scoring system to allow a quick evaluation of how well a stream supports aquatic wildlife.  Are there slow moving pools and fast moving riffles to provide a variety of habitats?  Are there tree roots, rocks, deep pools, and logs to provide fish cover?  Does the stream have shade and stable banks?  A few volunteers even took photos of the turtles, fish, and crawdads they observed first hand.

Samples are currently being analyzed by the Indiana University Limnology Lab for E. coli, Total Suspended Solids, Total Nitrogen, Nitrate, Ammonia, Total Phosphorus, and Soluble Reactive Phosphorus.  These results will give us a better understanding of which areas in the watershed have higher concentrations of bacteria, sediments, and nutrients.

Thank you to our amazing Blitz coordinator Lynnette Murphy and to our generous staging location hosts – Boy Scouts of America Hoosier Trails Office in Bloomington, Brown County Inn in Nashville, Gatesville Country Store in Gatesville, Story Inn in Story, and the Pershing Township Fire Department in Freetown.  We greatly appreciate their support of our community effort and look forward to working with them again in the spring.  Hope to see you there too!

Sours: https://friendsoflakemonroe.org/watershed-management-plan-4th-qtr-2020-update/
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kolbasz wrote: ↑

Fri Jul 13, 2018 11:59 am

I am gonna kick this off for myself.

1. My local site one quoted me 31$ for a #50 bag 46-0-0, based on your price I assume I should look elsewhere?
I would look at another place only if saving ~$10/bag is worth the time and effort. Make sure it is not the slow release coated one.

2. Calculating quantity, 1# N / .46 = 2.17, 13k * 2 = 26. I assume I am close enough that at #50, 2 bags gets me 4 app (months). Unless of course I bump slightly or add a feeding and use all of 2 bags during my blitz

3. The part you removed about the winterizer, for a few years now, I have been using starter fertilizer as my winterizer/last application. Does this follow the same thought as far as not doing it?

I did not removed it. It is in post script 2 (PS2). The approach is to always use a fast source of nitrogen and not a starter one.

4. When it comes to the watering part, I can handle the front where I have irrigation, what should my plan be for the rest of the yard, wait for a time in the month due that I know it is going to rain, then run out an apply it real quickly?

Yes rain or run a hose sprinkler in the morning. It doesnt need a lot of water.

5. I am planning prodiamine with my next application of PGR, this will still fall in July. I had way less POA this year than the last few, so the thought is maybe I went a hair late last year in early August. Is this still OK? Not that it impacts the blitz, just wondering more on the how early is too early or is there such a thing?

PreM has nothing to do with the blitz. You could always do a split application (half in late July and half in sept). You just want it active before Poa start to germinate again. The problem is how to forecast the future. A raining summer with low temps normally leads to early poa a germination. The only risk with too soon is that it wears off sooner, but sooner is better than late.

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Sours: https://thelawnforum.com/viewtopic.php?t=4396
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Nitrogen blitz fall

You've reached the Virginia Cooperative Extension Newsletter Archive. These files cover more than ten years of newsletters posted on our old website (through April/May 2009), and are provided for historical purposes only. As such, they may contain out-of-date references and broken links.

To see our latest newsletters and current information, visit our website at http://www.ext.vt.edu/news/.

Newsletter Archive index: http://sites.ext.vt.edu/newsletter-archive/

Virginia Cooperative Extension - Knowledge for the CommonWealth

Crop and Soil Environmental News, November 2003

Late Fall Nitrogen Fertilization For Cool Season Grasses

Ray Smith, Forage Extension Specialist
Jonathan P. Repair, Forage Extension Agent
Scott Baker, Bedford Extension Agent
Bill Seay, Amherst Extension Agent

Why Consider Late Fall Nitrogen Fertilization?
Most of you would agree that anytime in the fall is a good time to apply phosphorus and potassium on forage grass stands. These nutrients aid in winter stand survival, root growth and general tolerance to plant stress. Generally we do not recommend N application after mid-September because it may over stimulate lush growth when the plant should be preparing for winter. The theory behind late fall nitrogen fertilization of cool season grasses is very simple. Apply low rates of N fertilizer (40 to 50 lbs/acre) in the late fall (mid October to late November) when cool temperatures have reduced top growth, but root growth is still active. The N is used to "set-up the plant" for winter and for healthy early spring growth. Not only does enhanced root growth aid in the uptake of water and nutrients, carbohydrate buildup in the stem bases promotes winter survival and spring regrowth.

Although research results are not absolute, late fall nitrogen applications to cool season grasses have the potential to enhance stands and spring forage yields. The following advantages are suggested based on research by Dr. Dale Wolf and long standing practices with Turfgrass stands.

  1. Increasing Root Growth
    Root growth is stimulated by late fall N, but top growth is minimal during the cooler months of late fall and early winter.
  2. Increasing Plant Density
    High levels of carbohydrates in stem bases enhance the formation of crown buds and subsequent new tillers the following spring. Enhanced tillering leads to thicker stands.
  3. Increasing Drought Tolerance
    Larger, stronger root systems have the ability to maintain plants during drought periods.
  4. Decreasing Summer Weeds
    Thicker grass stands are more competitive with weeds.
  5. Cheaper Nitrogen Costs
    Historically nitrogen is cheaper in the fall vs. spring. Supply is up and demand is low dictating lower prices.
  6. Accessibility of Custom Applicators
    Custom applicator workloads are generally far below that of early spring.
  7. Applying Phosphorous and Potash at the Same Time
    Phosphorus and potassium can be applied at the same time as nitrogen with little concern for nutrient leaching.
  8. Applications Not as Weather Dependent
    Fall conditions can be drier than early spring allowing access by spreader equipment.
  9. Maintaining and/or Enhancing Yields
    Yields during the following growing season are either maintained or enhanced by late fall N applications. A recent three year two location orchardgrass study conducted by VA agents Scott Baker and Bill Seay (Bedford and Amherst counties) showed that late fall N application sometimes enhanced spring forage yields and sometimes did not, but was never a detriment.

Late Fall Nitrogen Application Timing and Rates
Nitrogen should be applied in mid to late fall once the topgrowth of cool season grasses begins to stop. This is generally mid October to late November depending on the area of the state. When applying nitrogen it is important to use a highly soluble sources (eg. Urea, ammonium nitrate, ammonium sulfate, liquid UAN). Organic forms of nitrogen (eg. animal manure) will not have the same effect on cool season grasses in late fall. Although some N in manure is in the soluble ammonium form, the majority is tied up in organic compounds and requires warm temperatures and microbial breakdown before it becomes plant available.

Once hard frosts cause the deterioration of leaf tissue, N applications are not recommended because plant uptake is minimal and applied N is wasted.

In conclusion, low rates of N (40 to 50 lb/acre) applied in the late fall to cool season grasses have been shown to improve root growth, spring regrowth, stand density, and maintain or improve forage yield. Under hay production, additional spring or early summer N applications are required for maximum production.

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Sours: https://www.sites.ext.vt.edu/newsletter-archive/cses/2003-11/latefall.html

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