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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. Fall 2010, Vol. 18, No. 4, Issue 70.

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. Spring 2010, Vol. 18, No. 3, Issue 69.

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. Issue 62, Vol. 16, No. 4 - Fall 2008 (PDF, 2 pages, 14.7 KB)

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 benefits of P fertigation on apple; research on sweet cherry in early stages. Issue 61, Vol. 16, No. 3 - Late Spring 2008 (PDF, 3 pages, 18.5 KB)

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 Issue 60, Vol. 16, No. 2 - Early Spring 2008 (PDF, 3 pages, 18.5 KB)

Still Important: Starters On High P Soils Maryland studies show P improves corn yields even when soil P levels are high.. Issue 59, Vol. 16, No. 1 - Winter 2008 - Page 12-13 (PDF, 2 pages 212 KB)

Timing of N and P Crucial In Achieving High Corn Yields Drs. M. Alley, M. Martz, and W. Thomason Inadequate N availability during first six weeks after planting can result in reduced yield potentials. Issue 57, Vol. 15, No. 3 - Spring 2007 - Pages 20-23 (PDF, 3 pages, 355 KB)

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. Issue 54, Vol. 14, No. 4 - Fall 2006 - Pages 14-16 (PDF, 3 pages, 270 KB)

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. Issue 54, Vol. 14, No. 4 - Fall 2006 - Pages 12-13 (PDF, 2 pages, 209 KB)

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. Issue 53, Vol. 14, No. 3 - Spring 2006 - Pages 17-19 (PDF, 2 pages, 78 KB)

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. Issue 53, Vol. 14, No. 3 - Spring 2006 - Pages 8-10 (PDF, 2 pages, 67 KB)

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. Issue 51, Vol. 14, No. 1 - Winter 2006 - Pages 14-16 (PDF, 2 pages, 88 KB)

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. Issue 51, Vol. 14, No. 1 - Winter 2006 - Pages 17-19 (PDF, 2 pages, 173 KB)

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. Issue 50, Vol. 13, No. 4 - Fall 2005 - Pages 14-16 (PDF, 2 pages, 53 KB)

Determining the Yield Potential of APP in Varying Australian Soil Environments T. McBeath and Drs. E. Lombi, M. McLaughlin, R. Holloway, R. Smernik, and E. Bunemann Researchers design a series of experiments to investigate the hydrolysis and sorption of pyrophosphate. Issue 50, Vol. 13, No. 4 - Fall 2005 - Pages 17-19 (PDF, 2 pages, 78 KB)

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. Issue 45, Vol. 12, No. 2 - Spring 2004 - Pages 8-10 (PDF, 2 pages, 55 KB)

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. Issue 44, Vol. 12, No. 1 - Early Spring 2004 - Pages 20-23 (PDF, 3 pages, 55 KB)

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. Issue 42, Vol. 11, No. 3 - Late Spring 2003 - Pages 8-10 (PDF, 2 pages, 20 KB)

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. Issue 37, Vol. 10, No. 2 - Spring 2002 - Pages 8-11 (PDF, 3 pages, 296 KB)

Ortho vs Poly Dr. Raun Lohry Author takes a look at the history and behavior of ortho and polyphosphates. Issue 35, Vol. 9, No. 4 - Fall 2001 - Pages 17-19 (PDF, 3 pages, 25.4 KB)

Does Variable Distribution Affect Liquid P-Use Efficiency? Drs. B Eghball and D.H. Sander Results indicate that at lower rates P solution is not distributed as a continuous band but rather as droplets of different sizes. Issue 32, Vol. 9, No. 1 - Winter 2000 - Pages 18-21 (PDF, 3 pages, 30.0 KB)

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. Issue 32, Vol. 9, No. 1 - Winter 2001 - Pages 9-11 (PDF, 2 pages, 27.2 KB)

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. Issue 30, Vol. 8, No. 3 - Summer 2000 - Pages 16-19 (PDF, 2 pages, 75.9 KB)

Cotton Yields Respond To Phosphorus Fertigation J.S. Reiter, and Dr. D.R. Kreig Texas research shows fertigation is a viable option to save cotton growers both time and money on fertilizer inputs. Issue 29, Vol. 8, No. 2 - Spring 2000 - Pages 20-22 (PDF, 3 pages, 224 KB)

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. Issue 28, Vol. 8, No. 1 - Winter 1999 - Pages 26-28 (PDF, 2 pages, 14.6 KB)

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. Issue 27, Vol. 7, No. 4 - Fall 1999 - Pages 10-13 (PDF, 3 pages, 22.4 KB)

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. Issue 26, Vol. 7, No. 3 - Summer 1999 - Pages 16-19 (PDF, 3 pages, 27.5 KB)

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. Issue 25, Vol. 7, No. 2 - Spring 1999 - Pages 22-25 (PDF, 3 pages, 18.5 KB)

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 key. Issue 23, Vol. 6, No. 4 - Fall 1998 - Pages 14-18 (PDF, 3 pages, 83.8 KB)

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. Issue 18, Vol. 5, No. 3 - Summer 1997 - Pages 16-19 (PDF, 3 pages, 23.6 KB)

P Rate Affects P Movement Drs. B. Eghball, D.H. Sander, J. Skopp Nebraska researchers look at effects of different application rates and different soils on P diffusion as well as P longevity. Issue 11, Vol. 3, No. 4 - Fall 1995 - Pages 28-30 (PDF, 2 pages, 15.1 KB)

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. Issue 9, Vol. 3, No. 2 - Spring 1995 - Pages 26-27 (PDF, 2 pages, 18.4 KB)

Effective Phosphate Management 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. Issue 4, Vol. 2, No. 1 - Winter 1994 - Pages 30-31 (PDF, 2 pages, 33.4 KB)

"There must be phosphorus uptake by half of the root system." Staff Report Fluid Journal interviews Dr. Stan Barber, Purdue University. Issue 4, Vol. 2, No. 1 - Winter 1994 - Pages 32-33 (PDF, 3 pages, 49.0 KB)