Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Archive for the ‘Water’ Category

Hydrilla Town Hall Meeting – Tuesday

Posted by romeethredge on August 13, 2015

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Here are some hydrilla recommendations for lakes from UGA Extension’s Gary Burtle.

“Granular formulations would work.

Granular Hydrothol would burn it back but have no lasting control.  Use this or diquat in association with grass carp stocking in small ponds.

Granular Sonar may provide longer term control because of slow release of fluridone.


Another burn back treatment is to apply a ratio of 2 gallons of Diquat and 2 to 3.3 gallons of Cutrine plus on a per surface-acre basis, so ¼ acre around a dock would take about ½ gallon of Diquat and ½ to ¾ gallon Cutrine plus.  Again, this treatment is more effective than Diquat by itself.


Granular Clearcast 2.7 G is effective at 80 pounds per surface acre in water that averages 4 ft deep.  So around a dock I would use 20 pounds in about ¼ acre area.

Clearcast 2.7G is quickly absorbed by foliage and/or plant roots and rapidly translocated to the growing points stopping growth. Susceptible plants may develop a yellow appearance or general discoloration and will eventually die or be severely growth inhibited.

Clearcast 2.7G is herbicidally active on many submerged, emergent and floating broadleaf and monocot aquatic plants. (BUT MAY TAKE SEVERAL WEEKS TO SEE THE EFFECTS)”


Remember to follow  regulations for your water body and all label requirements.

Posted in Water, Weeds | Tagged: , | Leave a Comment »

Mid-Season Irrigation for Peanuts

Posted by romeethredge on July 16, 2015

We are in a critical water stage for our summer crops, except for corn. Rains have been spotty with some dry areas remaining. Remember we’re never more than about 3 days from an agricultural drought, especially on sandy ground.  DrWesley Porter, UGA Engineer gives us some good peanut watering advice.

“Our ample rainfall seemed to stop later in May and into June.  With the lack of rainfall we also had an excess of heat move in.  Typically peanuts do not require much water early in the season but the lack of rainfall and extreme continual heat may have pushed some producers to turn their pivots on.  I would say that this was a good decision and recommended practice.  We had depleted much of our non-irrigated soil moisture due to the hot and dry period.

We have as of the end of June began to pick up some rainfall from scattered mid-afternoon Thunderstorms.  These rains are beneficial and very welcome.  However, high intensity rainfall does not do a very good job of refilling your soil water profile.  Keep that in mind and don’t bank fully on these high intensity events to fully provide the required water you need.

Based on the split planting of peanuts due to the warm early season weather we will be moving into one of two stages during July, either ramping up to peak water use and then dropping off, or just getting ready to move into peak water use.  The graphic to the right should give you a good idea of where we will stand for the 4 weeks of July.  Keep track of your rainfall, and supplement it with irrigation.  On rainfall events from 0.25” to 1” it is good to assume a 90% efficiency and on events over 1” it’s probably safest especially if it is a high intensity event to assume around a 75% efficiency.  Make sure you don’t short yourself on soil moisture as this can be detrimental.   Remember this requirement is IRRIGATION and RAINFALL! “


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Corn Still Needs Water

Posted by romeethredge on June 19, 2015

We are getting fairly close to the end of the watering of our oldest corn, it has begun denting, but the water use is still pretty high.  With the heat and winds, the water use is especially high.

In looking at some soil moisture graphs we can see that the corn is still pulling moisture from the field. A good thing about soil moisture monitoring is that you can see the soil moisture increase as the crop slows down on its water use. I looked at a couple of graphs this week and they show continued use by the crop. You can see soil water replenish with irrigation or rainfall and see how it goes down quickly. In some cases it’s hard to keep up.  Sometimes it’s deeper that you see the moisture leaving, in other words the surface may seem wet. It’s good to get a shovel to check moisture deeper as well.

Here they are below. They are from client graphs of Certified Ag Resources and Holder Ag Consulting.

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Posted in Corn, irrigation, Water | Tagged: , | 1 Comment »

El Nino – It should be raining next 2 weeks – Prob not

Posted by romeethredge on June 17, 2015

Here’s an El Nino update from UGA Ag Climatologist, Pam Knox. From this we may have some wet weather in the near future then the forecast for a dry mid summer, and rain this winter.

“In his briefing for the Appalachicola-Chattahoochee-Flint River stakeholder group today, Florida State Climatologist David Zierden noted that the eastern Pacific Ocean is nearly at the threshold for a strong El Nino now and should pass that threshold in the next month.  He presented some information about what to expect from a strong El Nino based on composites of weather information from the strongest El Nino events.  His summary slide is shown below.

Based on composites from the strongest El Nino years, May and June (top map) were expected to be wetter than normal in Texas and Oklahoma as well as the Southeast.  The composite-predicted rainfall has been very accurate for the southern Plains, although not as good for the Southeast, where we are close to normal. In July and August (bottom map), the composite suggests that a pattern shift may occur and that most of the South, including all of the Southeast, could go into a dry spell.  Often those dry spells are associated with above normal temperatures.  They may also be related to tropical seasons with lower than average activity in El Nino summers.zierden strong el nino impacts

Since El Nino typically brings rain to most of the Southeast in the winter, David was asked when the change from the late summer dryness to fall and winter wet conditions might occur.  He noted that it has occurred as early as early October in 2002, but in most years it is late October into November before the Southeast returns to rainy conditions.  Once the transition occurs, however, rainy weather may continue so farmers should watch for those conditions in the fall to help plan harvesting schedules.”

Go to Pam’s Blog, Climate and Agriculture in The Southeast

Posted in Water | 2 Comments »

Injecting through the Pivot

Posted by romeethredge on May 7, 2015

Dr. Wes Porter, UGA/AU Extension Irrigation Specialist gives us this irrigation injection information.

Traditionally we typically like to apply fertilizers and chemicals using either ground based (both fertilizers and chemicals) or aerial application methods.  However, we often times are under a time and suitable field working day constraint when it comes to applying many products.  Farmers also typically put more production inputs into irrigation crop land.  It’s known that irrigation has a higher yield potential and helps to protect that yield potential especially in dry years.  Thus, we want to do a more thorough job and provide the crops under irrigation with a more robust production plan to ensure we capture the full yield potential. Due to excessive rainfall during the growing season and in some cases excessive plant growth and height, it becomes difficult and sometimes impossible to enter a field to apply the proper chemicals and/or fertilizers.  In this case the addition of an injection pump for chemigation and fertigation can be very advantageous.  A center pivot can typically walk around the field when the moisture level is much higher than can a ground based sprayer.  Thus, one main advantage is the ability to apply nutrients at critical periods of crop demand.

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One of the most daunting tasks in using a center pivot for chemigation or fertigation is calculating the injection rate of the fertilizer or chemical.  The following process and example can be found at along with more information about specifics on Fertigation of Row-crops.

Steps for calculating fertilizer injection rate:

  1. Determine the irrigated area (acres)

  2. Determine the required application rate of product (in gallons per acre)

  3. Determine the amount required

  4. Determine the injection rate

For a practical example:

Let’s assume that you want to apply 30 lbs N/ac of UAN-32 through a 1,500 ft long center pivot at a rate of 0.3 inches in 12 hours (one complete circle).

  1. Irrigated area = = 3.14 * 1,5002= 7,065,000 ft2

    1. Divide ft2 by 43,560 to get acres = 7,065,000 ÷ 43,560 = 162.2 acres

  2. Determine application rate: = 30 lbs N/ac ÷ 3.5 lb N/gal = 8.6 gal/ac

  3. Determine required amount:  = 8.6 gal/ac * 162.2 acres = 1390.3 gallons

  4. Injection Rate:  = 1390.3 gal ÷ 12 h = 115.9 gal/h

Posted in Corn, irrigation, Water | Tagged: , | Leave a Comment »

El Nino Strengthening

Posted by romeethredge on April 29, 2015

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1)  El Nino has been re-energized and should strengthen in the short term

 2)  Our rainy April is likely partly because of the strengthening El Nino

 3)  May and June are more likely than not to remain wetter than normal

 4)  July and August are tilted the other way and could be dry (like last year).

 5)  Another quiet hurricane season is forecast

 The above are comments by David Zierden, Florida State Climatologist.

Here’s an link to an informal discussion of the strengthening El Nino and what it means to our area this summer.

Posted in Agriculture, Water | Leave a Comment »

Aquatic Meeting – Apr 27th Donalsonville

Posted by romeethredge on April 23, 2015

Dr. Gary Burtle, UGA aquatic scientist, will be here to talk about pond management on Monday evening, April 27th at 7:30 pm, in Donalsonville. This is a joint meeting of the Seminole County Young Farmers and County Extension. Please call if you plan to attend, 229-524-2326.


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Rain, Rain, Go…….. take a break

Posted by romeethredge on April 20, 2015

We’ve had a lot of rain in the past 10 days. Down near Lake Seminole and in many other spots have had 9 inches or more. Here in Donalsonville we’ve had about 6 inches.

See the chart here from that shows we, on average would expect to get about 1.5 inches over this time frame (in red).  But last year we got this much, another rainy spring.

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Even more rainy in 2014 if you look at the last month of data, it was two times more rain. This year we were able to get a lot done before this last rainy spell.

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Question of the Week – Bryozoans

Posted by romeethredge on April 3, 2015

Last week I had a photo of some Bryozoans in a pond. The pond had few bream in it as they eat these tiny animals, that clump together to make these balls in the water. Usually its a sign of good water quality.

This pond was spring fed with good clear water. When I held one glob it broke apart and here it is.



County Agent Laura Griffith said my photo last week reminded her of this painting.Fullscreen capture 3272015 30240 PM


Here’s an excerpt from a UGA article about these creatures.

“If you see what look like jellyfish floating in Georgia ponds, don’t be alarmed. These are actually harmless moss animals called bryozoa.“I get a lot of calls from pond owners who want me to come out and look at the ‘thing,’ ‘glob’ or ‘weird creature’ that’s under the surface of their ponds,” said Jim Crawford, the University of Georgia Cooperative Extension coordinator in Jefferson County.Bryozoa are colonies of aquatic animals belonging to the phylum Ectoprocta. Most live in saltwater, but one class, Phylactolaemata, lives exclusively in fresh water.“Pectinatella magnifica is the type seen most often in our county ponds, and it consists of a mass of animals living on the surface of a gelatinous mass that is 99 percent water,” Crawford said. “There could easily be millions of interconnected animals forming this one colony.”These colonies are firm and slimy to the touch and are most often attached to underwater limbs, pipes, logs, posts or even boat docks, he said.UGA aquaculture specialist Gary Burtle has seen bryoza as large as baseballs, footballs and even basketballs.“They are a food source for panfish such as bream and crappie,” he said. “They’re microscopic animals, and they form colonies for protection. When they’re football size, the bream can’t eat them.”There are three ways to control bryoza populations, he said: physical removal, chemical control and fish control.“If they’re large enough, you can scoop them out and take them to shore,” he said. “You can also add more panfish.”Treating algae with herbicides containing copper sulfate will subsequently control bryoza, Burtle said.“These bryoza have actually been in ponds for a while,” Crawford said. “But as the weather cools and the algae population recedes, the water becomes clear and they become highly visible. One pond had so many (bryozoa) they had attached themselves to the inside of the drainpipe. It actually became stopped up, and the water flow was down to a trickle.”Saltwater species are known to grow on the bottoms of ships, causing drag and reducing the efficiency and maneuverability of the fouled ships.“To me, they resemble a human brain. And that’s how I describe them to people on the phone,” he said. “If you take them out of the water and put them in the sun, the animals will dry out and die, leaving just the gelatinous material that looks like clear jelly.”Bryozoa are a sign of a healthy pond. “Pond owners should be fascinated that their pond is clean enough to support these prehistoric animal colonies,” he said. Burtle agrees.“They’re one of those anomalies that people just don’t understand,” Burtle said. “They’re on the same evolutionary scale as jellyfish, and they can’t hurt you.”“These freshwater bryozoa are completely harmless in and of themselves, except when they occasionally clog water pipes,” Crawford said. “If you have some close to your boat dock, they probably make interesting conversation pieces.”

This week’s question is this: What is this tree I have a branch of in my hand and what does it have to do with what day today is??


Posted in Agriculture, Water | Leave a Comment »

Question of the Week – Peanuts held by Vacuum

Posted by romeethredge on March 27, 2015

Calvin Atkinson, of Dollar Family Farms, answered last week’s question correctly: “Vacuum planters. Monosem to be exact. Seeds are pulled to plate which runs vertically. They are then scraped off at seed opener.”

Most of these are bought to plant peanuts but they are used for corn and canola and soybeans and other crops as well.  Donalsonville’s own Steve Spooner was involved with the twin row concept and planter development.

Here’s some corn planted with that planter, it does a good job. Most of these are bought to plant peanuts but they are used for corn and canola and soybeans and other crops as well.


This week’s question: What are these roundish globs floating in a pond I went to last week?


Posted in Corn, Peanuts, Water | Tagged: , , | Leave a Comment »

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