Major Nutrients
Sensor-Based N Management Strategy
Industry at Work
New optical sensing variable rate application system improves nitrogen use efficiency and increases producer returns.
Alternatives To Fall N Applications Via Fluids
Dr. Gyles Randall and Jeffrey Vetsch
Study looks at different application timing under two distinctly different corn tillage systems.
Will Continuous Supply of NH4+-N Increase Irrigated Crop Production?
Dr. D. R. Krieg
Results of studies in the Texas South Plains showed positive responses with cotton but not sorghum.
Managing Nitrogen With Five-dollar Gas
Dr. Gyles Randall
Escalating natural gas prices with little possibility of low-cost nitrogen returning, strongly encourages growers to fine-tune management practices or jeopardize profits.
N-Use Efficiency Improves In Ecological Intensification Project
Drs. T Arkebauer, A. Dobermann, K. Cassman, R. Drijber, J. Lindquist, J. Specht, D. Walters, and H. Yang
Management systems designed to preserve the integrity of the environment are proving profitable in yields and more efficient use of inputs.
Impact of Nitrogen Timing On Corn Production
Dr. J.E. Sawyer, Dr. D.W. Barker, Mr. J.P. Lundvall
Report summarizing studies conducted in the past twelve years on the effect of N application timing on corn production.
Is Fertilizing For Grain Quality Different From Fertilizing For Yield?
Dr. Fred Below, Juliann Seebauer, and Martin Uribelarrea
Illinois studies show that N rate needed to maximize grain protein is higher than that needed to optimize grain yield.
Proper Nutrient/Water Input—Key To High-yielding Cotton
Dr. Daniel Krieg
Management of nutrient supplies, especially nitrogen and phosphorus, ensures deficiencies will not occur during early stages of fruit development.
UAN Demonstrates Its Effectiveness In Western Australia
Industry at Work
Advantages of fluids catching on in Western Australia where their use is expanding.
Value of Fluid Flexibility In Intensive Wheat Management
Phil Needham
Nitrogen is a key component to yield and accurate timing of the appropriate form of the nutrient can reap huge rewards.
Variable-rate N Management: One Option For Better Profits
Drs. James Schepers and John Shanahan
Also increases N-use efficiency and minimizes potential environmental consequences.
Basics Short Course
The nitrogen (N) chemistry of bands is affected by materials applied, rates of application, and by soil conditions such as pH, organic matter content, biological activity, exchange capacity, compaction, temperature and moisture content.
Applying Some Starter N at Seeding Critical in Spring Wheat and Canola
Drs. G. Lafond, S. Brandt, W. May, C. Grant, A. Johnston
Canadian researchers speculate that 50 percent of total N required should be applied at seeding to minimize risks with postemergent N applications.
Late-season Applied N Can Increase Alfalfa Yields
Drs. W. Raun, G. Johnson, S. Phillips, W. Thomason, Mr. J. Dennis, Mr. D. Cossey
Increased yields due to applied N found in last or second to last harvest.
Returns Mixed On Wheat Pasture Response To N and Maintenance P in Wheat/Stocker Systems
J. Sij, W. Pinchak, J. Ott, B. Min, D. Malinowski, D. Robinson
Even though yields were increased nearly 6 bu/A, a rough analysis shows returns were only marginally profitable.
Optimizing N Management Without Ammonium Nitrate
DRS. ALAN BLAYLOCK AND LARRY MURPHY
Nitrogen-use efficiency coming more into focus with the gradual phasing out of ammonium nitrate.
Stopping N Losses More Urgent Than Ever With Current Nitrogen Prices
INDUSTRY AT WORK
More and more growers are looking to urease inhibitors to curb N losses.
Post-emergent Nitrogen Applications Have Potential for Increasing N-Use Efficiency in Spring Grains
Dr. G. Lafond, S. Brandt , W. May, C. Holzapf el and Dr. A. Johnston
Provisos are that some starter N is applied at time of seeding, but the amount of starter N is dependent on how much risk the grower is willing to assume by going with more N after crop emergence.
Strategies For Split Nitrogen Applications
Drs. Gyles Randall and Michael Schmitt
Overview is offered on over 60-site years of field data on corn grown in medium and fine-textured soils.
Study Suggests No Consistent Yield Benefit To Split N Fertilization
Drs. Ramona Mohr and Dale Tomasiewicz
Tuber yield highest for the 4x split N treatments in one of four site-years in Manitoba.
How To Enhance Soil Organic Carbon Sequestration
Dr. Ardell Halvorson and Curtis Reule
Texas studies show optimizing crop yields and reducing soil erosion via proper management practices are paying dividends not only environmentally but in crop yields as well.
Timing of N and P Crucial In Achieving High Corn Yields
Dr. M. Alley, M. Martz, and Dr. W. Thomason
Inadequate N availability during first six weeks after planting can result in reduced yield potentials.
Slow-release Fluid N Bumps Potato Yields Versus Other N Sources
INDUSTRY AT WORK
Trials at Cornell Cooperative Extension and University of Wisconsin compare fluid N with ammonium nitrate, urea, and ammonium sulfate.
In Search of Nitrogen Efficiency
Drs. James S. Schepers, Darrell G. Watts and Todd A. Peterson
Nebraska MSEA project explores ways to improve crop N use efficiency.
More Work Needed on Alternate Furrow N Fertilization
Dr. Paul W. Tracy and S. G. Hefner
Improved N-use efficiency not evident in initial corn/cotton irrigation studies.
What’s Right Amount of N? Using Sensors May Provide Better Answer
Dr. Newell R. Kitchen
For variable-rate applications, in-fi eld on-the-go sensors may be just the ticket for applying the correct amount of N.
Automatic Guidance Systems Add Efficiency To Fertilizer Management
Dr. Tony J. Vyn and Terry D. West
Most precise GPS guidance available is the RTK system.
Split N and P Fertigation Beneficial For Pear Production
Drs. Xinhua Yin, Clark Seavert, and Jinhe Bai
Banding N and P also increases fruit yield and size in Oregon studies.
Managing To Reduce Greenhouse Gas Emissions
Drs. D. Walters, K. Cassman, A. Dobermann, M. Adviento-Borbe, A. Liska, J. Specht and H. Yang
Managing at high yield levels creates large sinks for carbon and mineral N, providing prerequisite for reducing global warming potential.
Limiting N Loss In No-till Corn And Grain Sorghum Production
Dr. Barney Gordon
Slow-release polymer-coated urea product are beginning to become available for agricultural use.
Fluids Shine in Ammonia Volatilization Comparisons
Dr. Richard H. Fox and William P. Piekielek
Tests in no-till corn fields in central Pennsylvania compare UAN with urea.
N Rate, Hybrid and Plant Population Affect Corn Yield
Drs. P. R. Thomison, J. W. Johnson and D. J. Eckert
Studies conducted over three-year span in eight different environments.
Effective Nitrogen Management
FFF Review
N-use efficiency/environmental satety hinge on how well this mobile nutrient is managed.
Chlorophyll Meter Promising As Tool For Nitrogen Management
Chad Berghoefer and Dr. Randy Killorn
But variances in weather and hybrids make it difficult to develop a standard critical level.
Extra Crop Is Payoff In Dryland No-till Intensified Cropping System
Dr. D.G. Westfall, Dr. G.A. Peterson, R. L. Kolberg, L. Sherrod
N management improves in dryland no-till production system where cropping intensity is increased versus traditional wheat-fallow system.
Less Than Optimum N Rates?
Dr. D.H. Sander
Perhaps. Nebraska researcher warns that reducing N rate much below optimum would produce unacceptable yield and income losses for producer and drive up food prices.
Sidedressing Potassium and Nitrogen on Corn
Dr. R. D. Miller
Evaluations made on yield effects.
Nitrogen Fluids Improve Yield and Quality of Wheat
Dr. P. S. Kettlewell and Jane M. Cooper
Soil-applied and foliar N applications show positive responses in UK winter wheat studies.
Genetic Gain Via Nitrogen Interaction in Soybeans
O. Ortez, F. Salvagiotti, J. Enrico and I. Ciampitti
Yield increases recorded in studies at U.S. and Argentina Sites.
Nitrogen Management Key In Conservation Tillage Crop Production
Dr. Donald J Eckert
Ohio studies show that method and timing of N placement have an effect on N-use efficiency.
Fluid Fertilizer Industry Showing Significant Gains in Argentina
Dr. Ricardo Melgar
UAN and N-S solutions widely adopted by top corn and wheat growers.
N Management, Plus Optical Sensors, Helps to Refine N Rates
Drs. G. Lafond, C. Holzapfel, and W. May
Matches crop with soil and crop conditions to enhance yields.
Injecting N Cuts Application Rate in Half?
Drs. R. K. Roberts, D. C. Gerloff, D. D. Howard
Could be, say University of Tennessee researchers who set up models comparing broadcasting with injecting UAN in no-till corn.
Injection is Most Efficient Method of UAN Placement
C.L. Mann and Drs. D. B. Mengel and S. E. Hawkins
Comparison trials show effects of timing, application methods, and nitrification inhibitors on no-till corn yeilds.
Moving Toward A Global Approach To Nitrogen Management In Maize
Drs. Daniel Walters, Tri Setiyono, Haishun Yang,
Kenneth Cassman, and Achim Dobermann
Maize-N model computer simulation program recommends nitrogen rates for maize crops.
A Look at the Economic Benefits of Enhanced Efficiency Nitrogen Fertilizers
Drs. C. Grant, A. Moulin, and N. Tremblay
In addition to highest possible crop return per dollar, study also considered evaluation of environmental benefits.
Drip Irrigation Improves N Efficiency
Dr. T.K. Hartz
Trend in California is drip irrigation to improve water/N management and protect environment.
Beware of N Lockup in Reactivated CRP Fields
Dr. Paul Fixen
Carbon to nitrogen ratios higher than 30:1 could temporarily immobilize soil or fertilizer N in high-residue fields.
Fine-tuning N For The Environment
Dr. Raun Lohry
Understanding the nature of N and how it can be managed are essential to making fertility practices environmentally friendly.
A Look At Increasing Late N Availability In Soybeans
Dr. Ricardo Melgar
Better synchronization with N demand sought via better timing of N availability to crop.
N: the Vital Nutrient in the Great Plains
Dr. Gary Peterson
Cropping intensification brings greater need for N fertilizers in Great Plains.
N Fights Corn Root Worms?
Dr.Walter E. Riedell
Data from South Dakota research suggest that N management could play an important role in improving tolerance to corn root worms.
Can Protein Levels Be Economically Increased?
Dr. D. Brian Arnall, Mr. Jeremiah Mullock, and Dr. Brad Seabourn
Initial trials evaluated on winter wheat at two stages.
UAN, AN Effective For Sugarcane in Brazil
Drs. Eros Francisco, Fabio Dias, Raffaella Rossetto, Yebin Zhao, and Luis Prochnow
Field studies show them more effective than urea.
Corn Responds Best To Spokewheel Injected UAN In Ridge-till Trials
Drs.G.W. Randall, T.K. Iragavarapu, B.R. Bock
Minnesota scientists seek optimal N efficiency and minimal ammonia volatilization in four-year study.
Point Injection of N Shines in Sugarbeet Trials
Drs. L.W.Van Tassell, Alan D. Blaylock, Bozheng Yang
Wyoming researchers provide economic analysis comparing broadcasting with point injection and knife banding.
Soil Variability In Landscapes Affects N Management
Drs. R.A. Ortega, D.G Westfall, and G.A. Peterson; W.J. Gangloff
Colorado researchers find topographical variability affects grain yield, soil properties, and N fertilizer response of dryland corn in VRT studies.
High Residual Soil Mineral-N Impedes Response
R. Khosla, Dr. M.M., Alley, P.H. Davis, Dr. D.E. Brann
Virginia researchers find increased residual N accumulations in soil from drought and changing crop practices can sharply reduce crop response to additional N applications.
Applying Liquid Nitrogen In Spring Wheat
Dr. Olga S. Walsh, Robin J. Christiaens, and Arjun Pandey
Results show highNRG-N has an advantage in terms of protein yield and NUE.
N Use Efficiency Improved On Dryland Corn
Dr. Pawel Wiatrak
Clemson algorithm successfully used in Southeastern Coastal Plains.
Applied N At R3 Stage Bumps Soybean Yields
T.L.Wesley, Drs. R.E. Lamond,V.L. Martin, S.R. Duncan
Nitrogen applications at R3 growth stage produce 11.8 percent average yield increase in two-year Kansas study.
Simulated Rain Experiments Measure Runoff of N and P
Drs. G.J. Gascho, R.D. Wauchope, J.G. Davis, C.C. Truman, C.C. Dowler, J.E. Hook, A.W. Johnson, and Mr. H.R. Sumner
Tests by Georgia scientists indicate UAN may not be as susceptible to runoff losses as granular fertilizers.
A Look At Starters, Row Cleaners And N Placement In No-Till
Dr. Gyles Randall and Jeffrey Vetsch
Minnesota researchers use study to determine effects of its components on no-till continuous corn and corn after soybeans.
Late-planted Soybeans Respond to Nitrogen Starter
Michael E. Starling, Dr.C.Wesley Wood, Dr. David B.Weaver
Cultivars are compared with varying responses to applied starters at low-N sites. Future studies will focus more on optimum N rates.
Mitigating Sulfur Deficiencies and Maximizing Cotton Yields
Through fluid nitrogen-sulfur fertilizer formulations.
Dr. W. H. Frame
NBPT Reduces Seedling Damage In UAN Trials
Drs. C. A. Grant, D. A. Derksen, D. McLaren
Canadian no-till canola studies find NBPT helps maintain stand density when increasing rates of side-banded UAN in certain soils.
No-Tillage and N Fertilization Enhance Soil Carbon Sequestration
Dr. Halvorson, C.A. Reule, Dr. L.S. Murphy
Studies show that returning N treated residue to soil works better in no-till than in conventional-till systems.
Fluid Nitrogen-Sulfur Formulations In Cotton
Used to mitigate sulfur deficiencies and maximize cotton yields.
Dr. H. Frame
NPK Starters Best N-Only Starters
Drs. R. E. Lamond and W. B. Gordon
Kansas researchers report combo produced superior corn yields even though soil P and K levels were high.
Nitrogen Management For Soybeans a Must
Dr. A. L. Shober and R. Taylor
Economics and environment are two essentials
Sidedressing Nitrogen in Corn Makes Sense
It is not only friendly to the environment but also improves return on investment and crop yields.
Low Salt Fluid NPK Fertilizer
Drs. G. Mooso, T. Tindall and J. Stark
Increases wheat production in Idaho.
Liquid N Shines in Turf Applications
Dr. C. F. Mancino, Ms. Dianne Petrunak, and Mr. Douglas Wilkinson
Shows less N loss compared to granulars in 1999 Penn State University putting green trials.
What About N in NPK Starters?
Dr. R.e. Lamond, Dr. W.B. Gordon, B.J. Niehues and C.J. Olsen
Be careful, Kansas researchers warn, about how high you raise those N rates.
Nitrogen Management For Soybeans a Must
Dr. A. L. Shober and R. Taylor
Economics and environment are two essentials.
Searching for a Right Balance in Plant Population and Nitrogen Fertility
Drs. J. M. Blumenthal and D. J. Lyon
Nebraska studies on dryland corn show interesting correlations between yields and management of plant populations and nitrogen fertility.
Improving Nutrient Management Via Evolving Strategies and New Technologies
Drs. J.S. Schepers, S. Payton, D.D. Francis, and J. Shanahan
Nebraska studies focus especially on nitrogen and its impact on the environment.
Using Starters to Reduce Broadcast Applications of P in Sugar Beets
Drs. Albert L. Sims and Larry J. Smith
Studies show P starters produced yields equal to or exceeding those produced by larger rates of P applied through broadcasting.
Don’t Overlook Effect of Variables on P Use in Corn-Soybean Rotations
Dr Gyles Randall and Jeffrey Vetsch
Tillage systems, P placement, P levels in soils, and applied P rate can affect yields and economic return Minnesota studies show.
Phosphorus Fertilizer Bumps Forage and Beef Production
Drs. D. Robinson, J. Sij, W. Pinchak, R. Gill, D. Malinowski, T. Baughman and Mr. S. Bevers
Forage and Beef production increased sufficiently to exceed the cost of added P.
Search To Improve P Nutrition In Wheat
Drs. C. Grant, G. Clayton, M. Monreal, N Lupwayi, K Turkington, D. McLaren
Use of mycorrhizal inoculant to encourage early-season uptake also employed in 2004 Manitoba and Alberta studies.
Determining The Yield Potential of APP In Varying Australian Soil Environments
T. McBeath and Drs. E. Lombi, M. McLaughlin, R. Holloway, R. Smernik, E. Bunemann
Researchers design a series of experiments to investigate the hydrolysis and sorption of pyrophosphate.
Banded P Increases Sugarbeet Yields
Drs. Jason Ellsworth and Bryan Hopkins
Idaho studies show deep-banded APP produced the most significant increases in sugarbeet production.
Variable Rate P Application Increases Rice and Soybean Yields
Drs. T. Walker, M. Cox, W. Kingery, S. Martin, L. Oldham, J. Street
More precise application of P helps maximize yield and stabilize production
Returns Mixed On Wheat Pasture Response To N and Maintenance P in Wheat/Stocker Systems
J. Sij, W. Pinchak, J. Ott, B. Min, D. Malinowski, D. Robinson
Even though yields were increased nearly 6 bu/A, a rough analysis shows returns were only marginally profitable.
What About Foliar P On Corn and Winter Wheat?
Drs. K. Girma, B. Raun, H. Zhang, J. Mosali
Oklahoma studies show peak yields when P is foliar applied.
Fluid P Performance Improved With Polymers
DRS. BARNEY GORDON AND TERRY TINDALL
Studies have shown new polymer technology combined with fluid P has significant effects on P-use efficiency and crop yields.
Fall Surface-Applied Fluid P Movement Into Soil Limits Potential Loss to Erosion
DR. JOHN KOVAR
Two years of measurements show that fall-applied fluid P moves into the soil, limiting losses and maintaining relatively higher levels of bioavailable P in top six inches of soil.
Timing of N and P Crucial In Achieving High Corn Yields
Dr. M. Alley, M. Martz, and Dr. W. Thomason
Inadequate N availability during first six weeks after planting can result in reduced yield potentials.
Still Important: Starters On High P Soils
Ron Mulford
Maryland studies show P improves corn yields even when soil P levels are high.
Split N and P Fertigation Beneficial For Pear Production
Drs. Xinhua Yin, Clark Seavert, and Jinhe Bai
Banding N and P also increases fruit yield and size in Oregon studies.
A Closer Look At P And Water Management On Productivity Of Apple And Sweet Cherry
Drs. G. H. Neilsen, F. Kappel, P. Toivonen, and D. Neilsen
Five-year study shows benefi ts of P fertigation on apple; research on sweet cherry in early stages.
Effective Phosphate Management Material
Contributed by the Potash & Phosphate Institute
Understanding behavior of phosphorus relative to environment and recent technology is critical in tapping this elusive nutrient so essential to plant growth.
“There must be phosphorus uptake by half of the root system.”
Dr. Stanley Barber
Dr. Stanley Barber, Purdue University distinguished professor emeritus, stresses nutrient placement as key to maximizing crop yields, during interview with Fluid Journal.
Phosphorus Applications Benefit Cotton Yields
Dr. D. R. Krieg, D. P. Allen and J. S. Reiter
Magnitude of benefit dependent on water supply being the primary driver of yield increases.
Phosphorus Improves Yields In Corn/Wheat Rotation
Drs. M. Ashraf, G.M. Pierzynski, W.B. Gordon, R.E. Lamond
Researchers report, however, varying P levels in soil had an effect on some responses.
Diffusion of Fluid and Granular Phosphorus and Zinc Inhibited in Dry Soil
Dr. Therese McBeath, Prof. Mike McLaughlin, Dr. Jason Kirby, Prof. David Chittleborough, and Dr. Roger Armstrong
Studies conducted in six soils from the cereal growing regions of Southern Australia and Kansas.
A Further Look into Fertilizer Recommendation Adequacy Regarding Phosphorus and Potassium
Drs. Dale Leikam, Gyles Randall, and Antonio Mallarino
Farmer-specific goals should be incorporated into the decision-making process.
Phosphorus Rate Affects Phosphorus Movement
Drs. B. Eghball, D.H. Sander and J. Skopp
Nebraska researchers look at effects of different application rates and different soils on phosphorus diffusion as well as phosphorus longevity.
Low Salt Fluids and Irrigated Potatoes
Drs. Terry Tindall and Galen Mooso
Maintaining adequate P availability is imperative.
Annual/Biennial Applications of P Compared in No-till and Chisel Plow
Dr. G.W. Rehm
Researcher finds variance between tillage systems in corn yield response to biennial applications.
What About P Loss?
Drs. W.M. Stewart, K.A. Janssen, and K. Polizotto
Researchers have and are developing strategies for keeping phosphorus in place. Management is the key.
Can Soil Chemical Changes Influence Plant Growth?
Ms. Joy Pierzynski, Dr. Ganga Hettiarachchi, & Mr. Raju Khatiwada
What about mobility and lability of various P fertilizers on high P-fi xing soils?
What About P Fluids In Strongly P-sorbing Soils?
Ms. Daniela Montalvo, Dr. Fien Degryse, and Dr. Mike J. McLaughlin
Tests are showing that P nutrition is still a challenge in acidic high P-fixing soils.
P Boosts Wheat Forage Yields In West Texas
Drs. Travis D. Miller and Brent Bean
Researchers use irrigated vs. dryland conditions, as well as surface-applied P vs. deep-banded P in multi-site comparison trials.
Simulated Rain Experiments Measure Runoff of N and P
Drs. G.J. Gascho, R.D. Wauchope, J.G. Davis, C.C. Truman, C.C. Dowler, J.E. Hook, A.W. Johnson, and Mr. H.R. Sumner
Tests by Georgia scientists indicate UAN may not be as susceptible to runoff losses as granular fertilizers.
P Fertility And Placement Enhance Wheat Forage Yields
Drs. Travis Miller and Brent Bean
Texas scientists emphasize the importance of adequate P in a wheat/beef grazing system.
Fluid Starters Bump Yields in High P And High K Soils
Dr. W.B. Gordon
Kansas field experiments on corn and soybeans compare two K sources and two placement methods at varying application rates.
Can Humic Substances Alter
Fertilize Reaction Pathways in Acid Soils?
J. Weeks and Dr. G. M. Hettiarachchi
Cotton Yields Respond To Phosphorus Fertigation
J.S. Reiter and Dr. D. R. Krieg
Texas research shows fertigation is a viable option to save cotton growers both time and money on fertilizer inputs.
Where Does Organic Phosphorus Fit In Your Fertility Program?
FFF Review
Phosphorus is a key ingredient in the DNA molecule. Strange as it may seem, up to 50 percent of the soil’s organic phosphorus could be in the form of DNA.
Alfalfa Responds To High P Rates, P Banding
R.W. Mullen, and Drs. G.V. Johnson, J.F. Stritzke, J.L. Caddel, S.B. Phillips, W.R. Raun
Oklahoma State University trials show that additional profit may be realized because implement and labor costs are decreased due to fewer applications.
Does Variable Distribution Affect Liquid P-Use Efficiency?
Drs. B. Eghball and D.H. Sander
Florida scientist offers tips on how to use starters, plus describes the many benefits that accrue from their use. He focuses on corn.
Ortho Vs. Poly
Dr. Raun Lohry
Author takes a look at the history and behavior of ortho and polyphosphates.
Improving Cotton Production Efficiency
Dr. W. H. Frame
With differing nutrient placement.
P and K Reserves Growing Thinner
Drs. P.E. Fixen and T.S. Murrell
Do we know enough about optimum soil test levels and nutrient needs at high yield levels is the question being asked.
Low Salt Fluid NPK Fertilizer
Drs. G. Mooso, T. Tindall and J. Stark
Increases wheat production in Idaho.
Blending MAP, APP Reduces Fluid Fertilizer Input Costs
J.J. Weeks Jr. and Dr. G.M. Hettiarachchi
While mitigating environmental impact in high pH soils.
Improving Cotton Production Efficiency
Dr. W.H. Frame
With differing nutrient placement
K In NP Starters Helps Bump Corn Yields
Dr. Barney Gordon
Three-year study shows that adding potassium can supply extra punch to push yields higher, even though soils already test high in P and K.
Trials Prove K Fertilization of Apples can be Beneficial
Drs. Gerry Neilsen and Denise Neilsen
Studies conducted in semi-arid region of British Columbia on potassium- and magnesium-deficient, coarse-textured soils.
Potassium on Rice
D. Dunn and Dr. G. Stevens
And its effects on yield, grain quality, lodging, and stalk strength
What About Foliar K On Soybeans?
Dr. P. Motavalli, Dr. K. Nelson, Dr. G. Stevens, and S. Phurahong
Despite a relatively inconsistent soybean response to foliar K, studies show an opportunity may exist to provide growers with a cost-effective method of applying foliar K.
Is K the Cinderella Nutrient for Reduced-Till Systems?
Drs. Douglas Karlen and John Kovar
All methods of providing additional K increased whole plant and corn ear-leaf K concentrations as well as grain yield.
K and Calcium Boost Melon Quality
Drs. Gene Lester and John Jifon
Studies show foliar applications of potassium and calcium can improve melon quality and shelf life.
Foliar K Applications Safe With Glyphosate
Drs. K. Nelson, P. Motavalli, G. Stevens, A. Kendig, M. Nath an, D. Dunn
Expect minimal soybean injury and reduction in weed control, depending on product selection and application rate.
Timing of N and P Crucial In Achieving High Corn Yields
Dr. M. Alley, M. Martz, and Dr. W. Thomason
Inadequate N availability during first six weeks after planting can result in reduced yield potentials.
Foliar K Makes Difference On Muskmelon Fruit Quality
Drs. J. L. Jifon and G. E. Lester
Even though soil K concentrations were high, supplemental foliar K treatments improved fruit quality in Texas studies.
Effective Potassium Management
FFF Review
Proper fertility vital with this relatively immobile nutrient.
Potassium Fertigation In Highbush Blueberry
Drs. D. Bryla and S. Orr
Increases availability of K and other nutrients in the root zone.
Sidedressing Potassium and Nitrogen on Corn
Dr. R. D. Miller
Evaluations made on yield effects.
A Further Look into Fertilizer Recommendation Adequacy Regarding Phosphorus and Potassium
Drs. Dale Leikam, Gyles Randall, and Antonio Mallarino
Farmer-specific goals should be incorporated into the decision-making process.
How Can Cotton Plants Best Exploit Potassium In Soil?
Dr. G.L. Mullins, C.H. Burmester, G.L. Pate
In search of an answer, Alabama researchers vary positioning of K in soil profile to study its effects on crop yield, K uptake, and root length density.
A Look at Effects of In-Furrow Applications of Potassium on Corn
Dr. Antonio Mallarino, Mr. Nicolas Bergmann, and Dr. Daniel Kaiser
Iowa on-farm fluid trials show mixed results regarding nutrient uptake, early growth, and actual grain yield after applying starter K.
Phosphorus Rate Affects Phosphorus Movement
Drs. B. Eghball, D.H. Sander and J. Skopp
Nebraska researchers look at effects of different application rates and different soils on phosphorus diffusion as well as phosphorus longevity.
KTS Boosts Potato Yields
Dr. Richard T. Zink
Colorado researcher explores the role of potassium thiosulfate in potato production.
Effects Of Seed-placed P Studied
Jim Gerwing, Dr. Ron Gelderman and Anthony Bly
South Dakota researchers find a number of variables determine tolerance of corn to P placed close to the seed.
Potassium Boosts Almond Yields Via Irrigation
Drs. R.D. Meyer, J.P. Edstrom, L.J. Schwankl
Yield differences over control are significant in micro-sprinkler system but not in single- or double line drip systems.
Foliar Potassium Bumps Cotton Yields
Dr. Bill Weir
California researcher reports consistent yield increases to foliar-applied potassium over a period of years in the San Joaquin Valley.
A Look At Potassium Deficiency in Cotton
Tyson Raper, Derrick Oosterhuis, Leo Espinoza and Taylor Coomer
Canopy reflective indices used to examine plant available K.
Fluid Starters Bump Yields in High P And High K Soils
Dr. W.B. Gordon
Kansas field experiments on corn and soybeans compare two K sources and two placement methods at varying application rates.
Potassium Fertigation and Organic Acids
Improving soil and plant nutrition in highbush blueberry
Dr. David Bryla, Scott Orr, David Leon
Should K Be Used On High K-Testing Soils?
Drs. W.E. Riedell, D. L. Beck, and T.E. Schumacher
In an irrigated no-till system, South Dakota researchers found K did not interact with N and P to affect corn yield.
Potassium Fertigation Improves Soil K Distribution, Builds Pistachio Yield and Quality
Drs. D.Q. Zeng, P. H Brown, B.A. Holtz
Available soil potassium rapidly depletes in postachio orchards where it is not applied, adversely affecting pistachio yield and quality.
Calculating Salt Index
Dr. John J. Mortvedt
Salt content is one of the most critical characteristics of fertilizers that should be considered when fertilizers are applied, especially with seed-row or “in furrow”placement.
Improving Cotton Production Efficiency
Dr. W. H. Frame
With differing nutrient placement.
P and K Reserves Growing Thinner
Drs. P.E. Fixen and T.S. Murrell
Do we know enough about optimum soil test levels and nutrient needs at high yield levels is the question being asked.
Low Salt Fluid NPK Fertilizer
Drs. G. Mooso, T. Tindall and J. Stark
Increases wheat production in Idaho.
Improving Cotton Production Efficiency
Dr. W.H. Frame
With differing nutrient placement
Sulfur Applications Boost Alfalfa Yields
Dr. Richard Koenig, kevin Heaton, and James Barnhill
In sites marginal or deficient in sulfur, tests indicate that consistent responses to sulfur fertilization can be achieved.
Thiosulfates: A Reliable Source For Sulfur in Agriculture
INDUSTRY AT WORK
Thio-Sul (ATS) is one in a line of proven products marketed by Tessenderlo Kerley.
ATS: The Multi-Use Sulfur Fertilizer
Dr. R. J. Goos
A secondary nutrient many agriculturists now think of as primary is part of the makeup of every living organism.
Effective Sulfur Management
FFF Review
A secondary nutrient many agriculturists now think of as primary is part of the makeup of every living organism.
Continuous Corn Yields Enhanced via NPS Combinations
Jeff Vetsch
Starter fluid combinations in conservation-till boost early plant growth and yields.
Don’t Overlook Sulfur in Crop Management
Drs. Cynthia Grant and John Kovar
It is a critical nutrient for crops as part of an overall management system.
Mitigating Sulfur Deficiencies and Maximizing Cotton Yields
Through fluid nitrogen-sulfur fertilizer formulations.
Dr. W. H. Frame
Enhancing Continuous Corn Yields
Via ATS placement methods
Drs. D. Kaiser and J. Vetsch
Fluid Nitrogen-Sulfur Formulations In Cotton
Used to mitigate sulfur deficiencies and maximize cotton yields.
Dr. H. Frame
Corn Responds To Sulfur Fertilization On Eroded Soils
Dr. Howard J. Woodard and Anthony Bly
Studies conducted in 2000 on no-till, rolling South Dakota landscape show yield variances on different slope positions.
One Good Way To Add Punch To Starters: Include Sulfur
Dr. John G. Clapp
Industry agronomist says potential yield increases from adding sulfur to starters should be even more positive in the future due to a decline in atmospheric sulfur.