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

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.

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

Foliar K Applications Safe With Glyphosate Drs. K. Nelson, P. Motavalli, G. Stevens, A. Kendig, M. Nathan and D. Dunn Expect minimal soybean injury and reduction in weed control, depending on product selection and application rate. Issue 56, Vol. 15, No. 2 - Spring 2007 - Pages 14-16 (PDF, 3 pages, 78 KB)

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. Issue 50, Vol. 13, No. 4 - Fall 2005 - Pages 8-11 (PDF, 3 pages, 54 KB)

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. Issue 50, Vol. 13, No. 4 - Fall 2005 - Pages 12-13 (PDF, 1 page, 39 KB)

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. Issue 48, Vol. 13, No. 2 - Late Spring 2005 - Pages 8-11 (PDF, 3 pages, 313 KB)

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. Issue 45, Vol. 12, No. 2 - Spring 2004 - Pages 14-16 (PDF, 2 pages, 50 KB)

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. Issue 42, Vol. 11, No. 3 - Late Spring 2003 - Pages 20-22 (PDF, 2 pages, 19 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)

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. Issue 33, Vol. 9, No. 2 - Spring 2001 - Pages 8-11 (PDF, 3 pages, 23.8 KB)

Should K Be Used On High K-Testing Soils? Drs. W.E. Riedell, D.L. Beck, 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. Issue 31, Vol. 8, No. 4 - Fall 2000 - Pages 14-17 (PDF, 3 pages, 150 KB)

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 pistachio orchards where it is not applied, adversely affecting pistachio yield and quality. Issue 31, Vol. 8, No. 4 - Fall 2000 - Pages 18-22 (PDF, 2 pages, 142 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)

Foliar Potassium Bumps Cotton Yields Dr. Bill Weir California researchers reports consistent yield increases to foliar-applied potassium over a period of years in the San Joaquin Valley Issue 23, Vol. 6, No. 4 - Fall 1998 - Pages 10-13 (PDF, 3 pages, 24.8 KB)

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. Issue 22, Vol. 6, No. 3 - Summer 1998 - Pages 10-13 (PDF, 3 pages, 29.6 KB)

KTS Boosts Potato Yields Dr. Richard T. Zink Colorado researcher explores the role of potassium thiosulfate in potato production. Issue 14, Vol. 4, No. 3 - Summer 1996 - Pages 16-17 (PDF, 2 pages, 14.5 KB)

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. Issue 11, Vol. 3, No. 4 - Fall 1995 - Pages 18-21 (PDF, 2 pages, 18.6 KB)

Effective Potassium Management Staff Report Proper fertility levels vital with this relatively immobile nutrient. Issue 6, Vol. 2, No. 3 - Summer 1994 - Pages 12-15 (PDF, 3 pages, 16.2 KB)