Boron in Fertilizer APplications

Differences in Boron Fertilizer Sources

Differences in Boron Fertilizer Sources

Boron was first shown to be an essential micronutrient for plant growth and development by Warington in 1923. Boron is essential for all plant growth, aiding in the transfer of sugars and nutrients from leaves to fruit and increasing pollination and seed development. Growers should know the relative boron needs for each specific crop, as well as the water soluble available boron supply in the soil, to determine the optimum rate and method of applying sufficient boron for optimum yields.

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Solubility of Solubor in Liquid Fertilizers

Solubility of Solubor in Liquid Fertilizers

The recommended soil application rate of boron generally ranges from 0.25 to 2.0 lbs. of B/acre.
Because it is difficult to separately apply these low rates of boron fertilizers to soil, granular or fluid NPK
fertilizers generally are used as carriers of boron. Such application assures more uniform application of boron to the soil and also eliminates the cost of separate applications. Soluble boron sources such as Solubor® may be easily mixed with fluid fertilizers to provide the recommended boron rates for crops.

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Amounts of Solubor to Mix into Spray Tanks to Supply Desired Boron Rates

Amounts of Solubor to Mix into Spray Tanks to Supply Desired Boron Rates

Foliar applications of boron generally are more effective than soil applications in supplying sufficient boron for flowering and reproductive development in crops. Solubor® is highly water soluble, and is commonly applied in foliar sprays. It is also compatible with most pesticides, so it also can be applied in these sprays. Because the season for the most effective foliar application of boron is short, foliar sprays must be
prepared quickly and accurately.

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Relative Plant Tolerance to Available Boron Supply

Relative Plant Tolerance to Available Boron Supply

Boron is essential for all plant growth. It aids in the transfer of sugars and nutrients from leaves to fruit, and increases pollination and seed development. Plant species vary considerably in their tolerance to the boron supply in the root environment. Plant species also vary considerably in their boron requirement. Reports show that many of those crops with higher boron requirements also usually have a greater tolerance to higher levels of available boron, so applying recommended boron rates and methods should not result in problems with excessive boron. Growers should know the relative boron needs for each specific crop as well as the available boron supply in the soil to determine the optimum rate and method of applying sufficient boron for optimum yields.

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How Much Will Increased pH Affect Pesticide Efficacy?

How Much Will Increased pH Affect Pesticide Efficacy?

Efficacy of some pesticides may be affected by increased pH of the pesticide tank mixes. Solubor® may increase the pH of unbuffered solutions. Inclusion of an appropriate buffer to control the pH of tank mixes is suggested for those pesticides whose efficacy is known to be reduced by increased pH.

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Rio Tinto Borates is a global leader in the supply and science of borates - naturally-occurring minerals containing boron and other elements. Refined borates are essential nutrients for crops. We are 1,000 people serving 500 customers with over 1,700 delivery locations globally. We supply 30% of the world's need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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