Optimize profits, yields with adequate zinc, P

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

This spring, many factors should be considered to maximize applied phosphorus (P) fertilizer efficiency. One often-overlooked factor is the interaction between P and zinc (Zn). Adequate, available Zn is necessary for crops to optimally use applied P.

click image to zoom North American soils have critically low (or below) Zn nutrient levels – as proven in the 2010 International Plant Nutrition Institute’s (IPNI) study of soil test levels in North America. Knowing of these deficiencies makes balancing soil nutrients a top-concern for growers. The IPNI 2010 research includes 4.4 million samples and 63 laboratories across all regions. Of those samples 37 percent showed less than 1 ppm Zn and 16 percent less than 0.5 ppm Zn.

“These regional trends are quite apparent,” says Paul Fixen, Ph.D., IPNI’s senior vice president and director of research. “Look at the upper Northern Great Plains area; this is the lowest phosphorus region in North America.”

Crops need zinc?
Yes. Don’t forget the Zn. Micronutrients, including Zn, are essential for overall plant health and optimum yield.

Many studies in corn and dry beans have shown high soil P availability can induce Zn deficiencies when Zn soil test is low. Research indicates P effects on depressing Zn uptake are physiological in nature and are not due to Zn inactivation or fixation in the soil. In high P environments, isotope studies also have shown Zn may concentrate at the root surface but does not move into the plant. In high-yield environments with high P availability, negative interactions of P with metallic micronutrients should be anticipated; steps should be taken to ensure micronutrient availability is adequate (e.g. Zn in starter fertilizer placed close to the row or with the seed). 1, 2

Protect nutrients against fertility challenges
Researchers estimate as much as 75 to 95 percent of applied P fertilizer becomes fixed in the soil, making it unavailable for plant use3. Despite these challenges, growers still are expected to produce prosperous crops.

To do so, nutrients must be applied at optimal levels to avoid deficiency, while maintaining manageable input costs. Even short-term deficiencies, especially early in the growing season, can result in significant yield reductions. Retailers, crop consultants and growers alike should know the importance of nutrient management, how each element affects the bottom line and the available tools to help protect P fertilizer investments. To help ensure adequate P availability and uptake, many growers throughout North America use SFP’s AVAIL Phosphorus Fertilizer Enhancer with their P fertilizer applications.

“Modern agricultural innovations continue to give growers the ability to produce high yields while maximizing resources and nutrients,” says Barney Gordon, Ph.D., agronomic consultant and emeritus professor in Kansas State University’s department of agronomy. “Despite weather variables, efficient nutrient use saves a crop. In bad years or good years, adequate essential elements, if made available, will help the grower stay ahead.”

1 Better Crops – “Phosphorus Interactions with Other Nutrients.” Vol. 83, No.1. 1999.
2 Moraghan, J.T. and H.J. Mascagni, Jr. – “Environmental and Soil Factors Affecting Micronutrient Deficiencies and Toxicities, In “Micronutrients in Agriculture,” p. 371-425, Soil Sci. Soc America, 1991.
3 Mortvedt, J.J. “Heavy Metal and Radionuclide Contaminants in Phosphate Fertilizers.” 1994.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Tube Series (TS) Conveyors

USC’s Tube Series Conveyors combine the gentleness of the signature Seed Series with the traditional stability of a tube-style conveyor, ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form