Calcium Added to a Soybean Fertilizer Program

Experiment Info

 

Planted:  5/27/2014
Harvest:  11/2/2014
Yield Goal: 175 bu/A
Target Fert.:  193-15-73
Variety:  DKC 49-29 RIB
Population: 30,000
Row Width: 30″
Prev. Crop: Soybeans
Plot Size:  15 x 820
Replications: 3
 Liquid BC:  5/27/2014
 Sidedress:  6/30/2014

 

Soil Test Values (ppm)

 pH: 6.8
CEC: 11.2
%OM: 2.3
Bray P1: 25
Bicarb P:
K: 99
S: 14
%K: 2.3
%Mg: 21.9
%Ca: 75.1
%H: 0
Zn: 0.9
Mn: 4
B: 0.6

Objective:

To test the yield benefit of adding a phosphorus compatible calcium source to a soybean planter fertilizer program. Many soils and crops can benefit form applications of calcium. However compatibility with phosphorus fertilizers is an issue. Agro-Culture Liquid Fertilizers LiberateCa is a 2% calcium product that safely mixes with fertilizers containing phosphorus without worry of incompatibility. An experiment was established at the NCRS that has an average percent base saturation of calcium at 68%. With a pH of 7.7 and good potassium level at 4.5% base saturation, the biggest concern is a slightly elevated magnesium base saturation. To help adjust those levels in a seed zone and provide extra calcium 2 qt/A of LiberateCa was applied in-furrow with a planter program of 5 gal/A Sure-K and 2 qt/A Micro 500. Yield response appears on the chart below.

Soybean 14-203

Conclusions:

  •  The standard program of 5 gal/A of Sure-K with 2 qt/A Micro 500, based off of soil test, increased soybean yield over the untreated check by 5.5 bu/A.
  •  The addition of LiberateCa to the AgroLiquid program further increased soybean yield by over 4 bu/A.

Effects of In-Furrow Fertilizer Rate on Soybean Stand in 30″ Rows

Experiment Info

 

Planted: 5/24/2014
Variety: 20RD20
Population: 142,000
Row Spacing: 30″
Previous Crop: Corn
Plot Size: 15 x 290/310
Replications: 4
Harvested: 10/23/2014

 

Soil Test Values (ppm)

 pH: 7.0
CEC: 7.5
%OM: 1.6
Bicarb P 18
Bicarb P:
K: 71
S: 6
%K: 2.4
%Mg: 24.8
%Ca: 71.8
%H: 0
Zn: 1.5
Mn: 8
B: 0.6
Yield Goal: 60 bu/A
Target Fertilizer Rate: 0-0-135

Objective:

An evaluation of in-furrow fertilizers at different rates to measure the effects on the established stand of 30″-row soybeans.

Placement of fertilizer in-furrow on 30″-row soybeans is risky, especially on light soils or in low moisture conditions. However, it is understood that there are many soils and growing conditions that this is an acceptable practice. This experiment was established to look at two products, Pro-Germinator and Kalibrate at three rates, 2.5, 5 and 7.5 gal/A and what effects they have on soybean stand. An  additional treatment of a combination of the two products was also tested. All treatments included 2 qt/A Micro 500 and were placed in-furrow with Rebounder seed firmers. Stand counts were taken 23 days after planting and can be compared to the untreated check. There was no difference in soybean yield and this data is not shown. Stand count results appear on the chart below.

soybean 14-504

Conclusions:

  • In-furrow rates at 2.5 and 5 gal/A of Pro-Germinator decreased soybean stand by 10,000 plants/A.
  • Kalibrate at 2.5 and 5 gal/A did not show a significant loss in established stand.
  • The 7.5 gal/A of either fertilizer source applied in-furrow significantly lowered the soybean stand.
  • Pro-Germinator decreased stand more than Kalibrate.
  • Although there was stand loss, soybeans can compensate when it comes to yield.

 

Soybean Planter Applied Fertilizer

Experiment Info

 

Planted 5/31/2014
Variety: 22RD00
Harvest: 10/26/2014
Yield Goal: 60 bu/A
Target Fert.: 0-33-128
Population: 154,000
Row Spacing: 15″
Previous Crop: Corn
Plot Size: 15 x 255
Replications: 4

 

Soil Test Values (ppm)

 pH 7.3
CEC 18.9
%OM 4.3
Bray P1
18
Bicarb P 16
K 110
S 13
%K 1.5
%Mg 19.4
%Ca 78.7
%H 0
Zn 1.2
Mn 3
B 0.7
Yield Goal: 60 bu/A
Target Fertilizer Rate: 0-33-128

Objective:

To compare the effects of planter fertilizer applied at planting on 15″ row soybeans. Different environmental and soil conditions can determine how soybeans respond to planter applied fertilizer. This experiment evaluated a safe total in-furrow rate of 6.5 gal/A for 15″ rows consisting of 3 gal/A Pro-Germinator + 3 gal/A Sure-K + 2 qt/A Micro 500 applied in-furrow with Rebounders at planting. Soil test values on the left side of the page were used to determine the target fertilizer rate. Soybeans were planted May 31, which is later than normal because of the wet cool spring. A planting population of 154,000 seeds per acre were planted with a Kinze planter setup with interplant row units to achieve the 15″ row spacing. Yields appear on the chart below.

 Soybean 14-711

 

Conclusions:

  • Planter applied fertilizer did have a significant yield advantage over the no planter fertilizer, yielding 7.1 bu/A higher.
  • The wet cool spring can be a very good environment to supply phosphorus and potassium with the planter so that the germinating seeds have a safe and easily available source of nutrients to develop quickly.

Fertilizer and method of application comparison on soybeans

Experiment Info

Planted: 5/13/2011
Variety: Pioneer 92Y53
Population: 150,000
Plot Size: 15′ x 180’/210’/130′
Replications: 5
Previous Crop: corn
Dry Broadcast: 5/13/2011
Foliar R1: 7/12/2011
Foliar R3: 7/25/2011
Foliar R4: 8/1/2011
Harvested: 10/18/2011

Soil Test Values (ppm)

 pH: 7.3
CEC: 6.5
%OM: 1.8
Bicarb: 13
K: 56
S: 9
%K: 2.3
%Mg: 17.3
%Ca 79.1
%H: 0
%Na: 1.0
Zn: 1.0
Mn: 4
B: 0.6

Objective:

Many times, fertilizer programs are overlooked for soybeans. This experiment compares different fertility programs for a soybean crop grown in 15-inch rows. A dry application of 100 pounds of 0-0-62 was applied in the spring before planting, compared to an Agro-Culture Liquid Fertilizers planter-applied and foliar program. Usually there is no further yield increase with foliar applications following planter applications of fertilizer. So this experiment evaluated some new approaches to this. In addition to the planter applied programs, foliar applications including the fungicide Headline®, NResponse and a mix containing 40% Pro-Germinator, 40% NResponse, 10% eNhance and 10% Micro 500 were used. Yields appear in the table below.
Soybeans 11-309Conclusions:

  • All fertilizer treatments increased soybean yields over the untreated check by at least 2 bu/A.
  • The conventional program of 0-0-62 yielded similar to the planter only program containing 5 gal/A Sure-K and 2 qt/A Micro 500.
  • As shown in past data, a foliar program containing 3 gal/A Sure-K and 1 qt/A Manganese produced yields similar to higher rates of planter applied fertility.
  • The addition of NResponse as a foliar application in the flowering growth stage increased soybean yield by over 2 bu/A.
  • The mix of products containing Pro-Germinator, NResponse, eNhance and Micro 500 added nearly a 2 bu/A yield increase. However, the cost of three applications even with the low use rate, may exceed the yield benefit.
  • Highest yield was seen with the addition of Headline® Fungicide to the NResponse foliar application, with a significant yield increase of 6.4 bu/A over the untreated check.

Comparison of Split Foliar Applications on Soybeans

Experiment Info

Planted: 6/2/2011
Variety: Stine 1932
Population: 150,000
Plot Size: 15′ x 300′
Replications: 4
Previous Crop: corn
Foliar V3: 7/6/2011
Foliar R1: 7/12/2011
Foliar R3: 8/1/2011
Harvested: 10/11/2011

Soil Test Values (ppm)

 pH: 6.8
CEC: 8.0
%OM: 1.8
P1: 46
K: 70
S: 8
%K: 2.2
%Mg: 19.1
%Ca 77.4
%H: 0
%Na: 1.3
Zn: 1.8
Mn: 8
B: 0.7

Objective:

Agro-Culture Liquid Fertilizers has two main foliar program options for soybeans. Depending on soil test Agro-Culture Liquid Fertilizers has two main foliar program options for soybeans. Depending on soil test levels, either a program of 3 gal/A Sure-K with 1 qt/A MicroLink Manganese or 2 gal/A fert-Rain are commonly used. For this experiment location, soil levels were medium to low on potassium with 70 ppm and 2.2% base saturation. In cases where potassium levels are medium, a foliar program including Sure-K would be a better option. In cases with higher potassium soils, ferti-Rain tends to work better. This experiment compared these two foliar programs applied at 3 different timings, keeping the total fertilizer rate for each product per acre for the season the same. Timings included (1) 1 application at V4, (2) 2 applications at V4 and R1 or (3) 4 applications at V4, R1, R2, and R3. (V4- 4  trifoliate, R1-beginning flower, R2-full flower, R3-beginning pod)

Soybean 11-508

Soybean 11-508 photo

Conclusions:

  • All foliar applications increased soybean yields over the untreated check by at least 3 bu/A.
  • With the soils in the experiment having medium potassium levels, there was no significant difference between the two foliar programs. However, at most timings, there was a slight advantage to the Sure-K with MicroLink Manganese application.
  • There was no statistically significant difference in soybean yield between the 3 timings of application. This shows, that a grower can apply a full rate in a single application or split the rate and “spoon feed” the crop if they are making multiple pesticide applications. It is a good practice to apply small amounts of nutrition when making any postemergence application.

Soybean Yield Response to Foliar-Applied Sure-K and Micronutrients (11-719)

Experiment Info

Planted: 6/1/2011
Variety: Stine 24RA02
Population: 150,000
Plot Size: 15′ x 255′
Replications: 4
Previous Crop: corn
Foliar V4: 7/7/2011
Foliar (V4+10D): 7/12/2011
Harvested: 10/31/2011

Soil Test Values (ppm)

 pH: 6.8
CEC: 12.2
%OM: 3.0
P1: 20
K: 121
S: 16
%K: 2.5
%Mg: 21.7
%Ca 75.5
%H: 0
%Na: 0.3
Zn: 1.3
Mn: 2
B: 0.6

Objective:

This experiment evaluates the benefits of adding micronutrients into a soybean foliar program when soil tests are low for micronutrients. This location has an extremely low soil level on manganese at 2 ppm. In addition to the 3 gal/A Sure-K, 1 qt of Micro 500 and 1 qt of MicroLink Manganese were added to the application. Applications were made to 15” row soybeans that were 9-inches tall in the V4 growth stage.

Soybean 11-719

Conclusions:

  • Both foliar programs with and without micronutrients significantly increased soybean yield over the untreated check.
  • The addition of 1 qt/A of Micro 500 and 1 qt/A MicroLink Manganese increased soybean yield 1.3 bu/A over the Sure-K only foliar program.

Soybean Fertilizer Programs in a Permanent Plot Rotation (4 Year Average)

Experiment Info

Planted: 5/31/2014
Harvest: 10/11/2014
Yield Goal: 60 bu/A
Target Fert: 0-0-96
Variety: 22:RC62
Population: 144,000
Row Width: 15″
Prev. Crop: corn
Plot Size: 15’x210′
Replications: 4
Potash: 10/4/2012

Soil Test Values (ppm)

 pH: 7.0
CEC: 12.4
%OM: 3.4
Bray P1: 25
K: 111
S: 5
%K: 2.3
%Mg: 21.4
%Ca 75.9
%H: 0
Zn: 1.5
Mn: 4
B: 0.7

Objective:

To evaluate long-term fertilizer program effects on soybean yield over time.

Starting in 2011 a long-term experiment in a corn-soybean rotation was developed to evaluate fertilizer program effects on crop yield and soil test levels. Treatments were applied in the same location each year. Four main fertility programs were evaluated in the soybean year. (1) AgroLiquid planter program including 5 gal/A Sure-K and 2 qt/A Micro 500, (2) AgroLiquid foliar program of 3 gal/A Sure-K + 2 qt/A Mn at V4, (3) full rate dry program of 200 lbs/A potash, (4) low rate dry program of 20 lbs/A potash. This low rate fertilizer treatment matches the actual pounds of potassium that the AgroLiquid planter program provides. Potash applications were applied in the fall following soybean harvest to provide potassium for the following years corn and soybeans the year after that. These fertilizer treatments are compared to a no fertilizer check. Fertilizer programs and yields for the corn portion along with soil test changes from this experiment can be found in the corn section of this report. Soybean yields appear on the chart below.

Soybean 4-year avg 2014

Conclusions:

  • All four fertilizer applications increased soybean yield over the no fertilizer check.After four years of testing and applications, the two rates of potash still provide similar yields with an average of less than 1 bu/A difference.
  • As we have seen in other testing, the four year average of the Agro-Culture Liquid foliar and planter applications are yielding very similar, however the foliar application is made at a lower rate then the planter application.

Comparison of Foliar Fertilizer Sources on 15″-row Soybeans (14-908)

Experiment Info

 

Planted: 5/31/2014
Harvest: 10/27/2014
Yield Goal: 60 bu/A
Target Fert: 0-38-110
Variety: P26T76R
Population: 150,000
Row Width: 15″
Previous Crop: Corn
Plot Size: 15 x 470
Replications: 4
Foliar 1: 7/16/2014

 

Soil Test Values (ppm)

 pH: 6.6
CEC: 9.5
%OM: 2.4
Bray P1:
17
Bicarb P:
K: 95
S: 12
%K: 2.6
%Mg: 18.9
%Ca: 71.2
%H: 6.6
Zn: 1.3
Mn: 4
B: 0.4

Objective:

Evaluation of foliar fertilizer sources applied on 15″-row soybeans in the V4 stage of growth.

For years the NCRS has shown the positive effects that foliar fertilizers can have on soybean yield. This year an experiment was established to compare Agro-Culture Liquid Fertilizers standard foliar programs if ferti-Rain and Sure-K to other AgroLiquid products not necessarily thought of as soybean foliars. These were Woody Plants and Trees, Fase2 and Green and Grow Wright Professional, These specialized products contain a balance of micronutrients that may prove beneficial in a foliar application. In addition, one outside source was tested for comparison, Conklin’s 3-4-8 with micronutrients was applied at their recommended rate of 2 qt/A. Applications were mixed with water and made at a total spray volume of 10 gal/A in mid-July when the soybeans were in the V4 growth stage. Yield results appear on the chart below.

soybean 14-908

Conclusions:

  • All foliar applications increased soybean yield over the no foliar check.
  • Traditionally used soybean foliar products ferti-Rain and Sure-K provided the highest yields in this experiment.
  • Highest yield of 54 bu/A was achieved with the addition of 1 qt/A Micro 500 to the Sure-K foliar program.
  • The other products not commonly used as a soybean foliar application did not yield as much as the Sure-K or
    ferti-Rain.

 

Soybean Fertilizer Rates and Placement in 15” rows

Experiment Info

 

Planted 5/15/2013
Variety: Pion. 92Y53
Population: 140,000
Row Width: 15″
Previous Crop: Corn
Plot Size: 15’x180/210×130
Replications: 5
Harvested: 10/11/2013

 

Soil Test Values (ppm)

 pH: 6.5
CEC: 6.5
%OM: 1.8
Bicarb P:
9
K: 76
S: 11
%K: 3.0
%Mg: 16.4
%Ca: 79.6
%H: 0
Zn: 1.0
Mn: 4
B: 0.6
Yield Goal: 60 bu/A
Target Fertilizer Rate: 0-0-124

Objective:

To observe the effect of varying fertilizer rates and placement on yield of soybeans in 15” row spacing.

Treatments were planted into no-till corn stalks on May 16th with a Kinze planter equipped with interplant row units. The Kinze planter includes both in-furrow Totally Tubular and in-furrow Rebounder’s with split stream application. Totally Tubular places nutrients on the bottom of the seed trench before the seed is placed in the furrow. Rebounders place nutrients over the top of the seed and to either side with the split stream. Soil conditions were ideal at time of planting. Three fertilizer rates, 5 GPA, 7 GPA and 9 GPA, were used. Each rate consisted of 50% Pro-Germinator and 50% Sure-K and applied through either of the two application methods. A no planter fertilizer check was also included for comparisons.

Soybean 13-309

Conclusions:

  • The Rebounder with split stream applications and placement above the seed appears to be safer at higher rates.
  • Yields were reduced when higher rates were applied through the Totally Tubular option.
  • These reductions were not significant between rates.
  • With good moisture Agro-Culture Liquid Fertilizer recommends: a maximum in-furrow nutrition of 3 gal/A for 30” rows and a maximum in-furrow nutrition of 7 gal/A for 15” rows.