For Results Above The Ground, Start Looking Below It.
Discover why crop nutrition is one of the most effective ways to boost crop production.
Crop Nutrient Removal
Up to 60% of your yield is dependent on soil fertility. And as crops continue to pull nutrients out of the soil, it’s more important than ever to invest in replenishing your fields.
* Reported nutrient removal coefficients may vary regionally depending on growing conditions. Use locally available data whenever possible.
** DM = dry matter basis; otherwise moisture content is standard marketing convention or at the stated moisture content.
Last modified April, 2014
|Wheat (Spring) Grain||bu||1.5||0.57||0.33||0.10|
|Wheat (Winter) Grain||bu||1.2||0.48||0.29||0.10|
Crop Nutrition Support
Here are some resources to help you understand the fundamentals of fertilizer, and the importance it has on maximizing your crops’ yield potential.
The Efficient Fertilizer Use Guide
The Efficient Fertilizer Use Guide is a comprehensive library covering the fundamentals of balanced crop nutrition and the 4R's of nutrient management.
Learn crop nutrition fundamentals and discover technical research and agronomic information about the single most effective way to maximum yield.
Ag Resource Library
A collection of articles, news items, videos and more information on crop nutrition from the experts at Mosaic.
Mg is an essential macronutrient! This and other macronutrients, such as nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and sulfur (S)...
Magnesium is essential for both plants and animals. A shortage can reduce photosynthesis in plants and can increase risk of serious...
Magnesium Management Tips to Minimize Grass Tetany
SOURCE: The Mosaic Company.
Thus, the need for, and the application of, limestone often are postponed. K-Mag serves as an excellent, high analysis provider of K, Mg...
Did you know... Less than one fifth of forage cropland is soil sampled.
Thus, the need for — and the application of — limestone often are postponed. K-Mag serves as an excellent, high analysis provider of K, Mg and S for these crops.
Shortages of Mg and S can be found nationwide. (See maps below)
K-Mag is well suited as a site-specific provider of Mg when soil test levels are in the responsive range.
K-Mag is a 3-in-1 storage solution.
K-Mag storage capacity expands the dealer storage for K by nearly a third. And, K-Mag can meet crop needs for both S and Mg.
The SGN numbers for K-Mag fit with those of the primary source of N, P and K. In contrast, dolomitic lime must be finely ground, applied separately and incorporated for best release of Mg to the crop.
SOURCE: The Mosaic Company.
Recent research demonstrated that Pacific Northwest growers who rely on fertigation to deliver nutrients to high-density apple...
Study Shows Increased Apple Quality With K-Mag
Research scientists conclude that K-Mag is one K source that won’t decrease critical Mg levels
Recent research demonstrated that Pacific Northwest growers who rely on fertigation to deliver nutrients to high-density apple orchards may be able to increase fruit quality by supplementing with a broadcast K-Mag fertilization program.
"The Pacific Northwest’s semi-arid conditions and coarse-textured soils create a unique soil fertility challenge for the region’s apple producers," says Dr. Gerry Neilsen, a research scientist with Pacific Agri- Food Research Center, Summerland, B.C. Neilsen, along with Dr. Denise Neilsen, conducted the three-year study on 15 typical high-density apple orchards on sandy soils.
"We found in previous studies that popular NP fertigation practices can actually induce K deficiencies, but the K deficiencies were more serious on the sandier sites," he says. (Roots under drip irrigation tend to only proliferate in smaller volumes of soil, therefore limiting the plant’s ability to acquire immobile nutrients, like K, Neilsen explains). "Applying a K-only source can correct the K problem, but what we’ve found is that both soil and leaf Mg levels go down."
Magnesium is essential for chlorophyll production, phosphorus (P) absorption and stimulation of plant growth. Deficiency symptoms in apples are characterized by interveinal chlorosis (and some necrotic brown tissue) on basal leaves of new year’s growth, and under extreme conditions, premature leaf drop and defoliation.
It was concluded that broadcast applications of 112 to 225 lbs/A of K as K-Mag:
- Increased leaf tissue K concentration
- Increased soil K levels
- Maintained leaf Mg concentration
Additionally, when leaf K levels had been inadequate, broadcast K-Mag applications:
- Increased fruit acidity (sharper flavor)
- Increased apple fruit size
- Increased red coloration
- Decreased incidence of water core.
A premium fertilizer source, K-Mag is a naturally occurring source of three essential nutrients – potassium (21.5-22%), magnesium (10.5-11%) and sulfur (21-22%). Available in the highly available water-soluble sulfate form, K-Mag is low in chloride and will not affect soil pH. It is 100% natural, and the K-Mag NATURAL grade is listed by the Organic Materials Review Institute (OMRI) for use in organic crop production.
New Leaf K Target: 1.3%
Neilsen says the British Columbia trials showed leaf K levels should be at or above 1.3%. "We used to say 1%, but we now know that apple trees really perform at 1.3% or higher," he says. "Go below that and you’re asking for problems."
With a heavy crop load, apples will draw K from the leaves, resulting in leaf scorch, he says. When this happens, the very process that drives fruit growth – photosynthesis – is impaired.
"The advantage of K-Mag is it supplies both K and Mg in the appropriate balance," he continues. "If growers have sandy soils that are susceptible to K and Mg problems, and their apples are under drip irrigation, they should strongly consider broadcasting K-Mag as a maintenance tool to keep up appropriate levels of K and Mg."
He adds that annual soil and leaf sampling, as well as physical observation of the plants, are critical. "Especially with high-density orchards, you have to think long term about soil fertility. You have to keep the tree’s framework healthy because it’s the framework for the next year."
SOURCE: The Mosaic Company.