Two Rivers Agronomy

This page will be dedicated to inform you of weed resistance, soil and plant fertility, the latest chemicals out and available to you, to inform you of pest and fungus and where they are and what to use, and useful weight and measure. 

Weed Resistance Management

When we think of weed resistant, the first thing that comes to mind is roundup. That's not always so. In 2007 Cowley Co. had it's first confirmed field of japanese brome in winter wheat that was resistant to ALS-inhibiting herbicides like Olympus. Since then, we are starting to see some buckwheat and some bushy wallflower (mustard) showing resistance to chemicals like finesse. We are now seeing some weeds showing tolerance to 2-4-D products. In Kansas we have around  seven to nine different weeds that are resistant to glyphosate products. As times change, our management tools need to change also. I'm attaching some links for your information.



How do you know if your fields are reaching their maximum yield potential


Through a soil test and tissue sample we can develop a better understanding of that crops nutrient needs. There are 16 identified elements that are essential to plant growth. Three of these elements are obtained mostly from the air and water: they are carbon, hydrogen, and oxygen. The other 13 essential elements come from soil solids and are the elements we tend to focus on in plant fertility management. The 13 essential plant nutrients are divided into three categories  based on the amount of the element required for plant growth.

1: Primary Nutrients  are Nitrogen (N), Phosphorus (P), Potassium (K)

2: Secondary Nutrients  are Calcium (Ca), Magnesium (Mg), Sulfur (S)

3: Micronutrients are Iron (Fe), Manganese (Mn), Boron (B), Molybdenum (Mo), Copper (Cu), Zinc (Zn), Chlorine (CI). Plants require primary nutrients in high amounts, secondary nutrients in lesser amounts, and micronutrients in only small amounts. Whether a nutrient is primary, secondary, or a micronnutrient, it is essential to plant growth. a deficiency in any one of the essential nutrients will restrict plant growth and yield. 

 Tissue sampling and soil testing are available at Two Rivers Coop for more info call Wayne Foster at 580-716-3928 or stop by one of locations nearest to you or Ark City 620-442-7990, Geuda Springs 620-447-3381, Marland 580-268-3316, Newkirk 580-362-2109, Udall 620-782-3621.
                                    Yield Loss and Soil pH
Chart outlining yield loss in varions crops as soil pH becomes more acidic.
  pH 4.7 pH 5.0 pH 5.7 pH 6.8 (ldeal)
 Corn   66%   27%   17%   0%
 Soybeans   35%   21%   20%   0%
 Wheat   32%   24%   11%   0%
 Alfalfa   98%   91%   58%   0%

Click on Logo For More Information

Two Rivers Coop Offers you premium products from Agrisolutions, Bayer, BASF, Dow, Dupont, FMC, Monsanto and Syngenta.  
More Info coming soon...... 
Pest and Fungus Report

Liquid or Fluid Volume

               Weight of Liquid Fertilizer

1 teaspoon = 1/6 fluid ounce = 0.17 fl oz. = 5cc                      (In Pounds Per Gallon)
3 teaspoons(level) = 1 Tablespoon = 0.5 fl oz. =15 ml Product
Approximate lbs./gal
Lbs. plant food per gal.
2 Tablespoons = 1 fluid ounce 28-0-0   10.66  
1 fluid ounce = 1/8 cup = 29.57 cc 32-0-0
8 fluid ounces = 1 cup10-34-0
16 fluid ounces = 2 cups = 1 pintNH3 82-0-0
32 fluid ounces = 2 pints = 1 quartWater
 8.33 0
128 fluid ounces = 1 gal. = 4 quarts   
"Rule of Thumb" for mixing herbicides for hand sprayers           Measure of Surace (AREA)
(Water per Gal.) (Amount of Chemical %)
        144 square inches = 1 square foot
1/2%      1%      1 1/2%       2%       5%         10%
                  9 square feet = 1 square foot
1 gal.2/3 oz  1 1/3 oz   2 oz      2 2/3 oz  6 1/2 oz  13 oz
      30 1/4 square yards = 1 square rod
25 gal.1pt        1qt       1 1/2qt         2qt       5qt        10qt
             160 square rods = 1 acre
100 gal.2qt      1 gal.    1 1/2 gal.   2 gal.    5 gal.    10 gal.
         43,560 square feet = 1 acre
             640 square acres = 1 square mile
               36 square miles = 1 township