Soil and Crop Issues

Boron reactions in soils

Boron reactions in soils

Boron deficiencies in crops are found mainly on low organic matter soils and on acid, sandy soils in humid regions. Organic matter is the storehouse for most of the available boron (B) in soils. Boron deficiencies frequently are associated with drought periods, because root activity decreases in the surface soil layer. Balanced soil fertility, which gives improved plant vigor and root growth, results in optimum uptake of B and other plant nutrients.

Learn More
Does manure contain enough boron?

Does manure contain enough boron?

Animal manures contain varying concentrations of most plant nutrients. The average boron content of animal manure is 0.03 lbs./ton. Assuming an application rate of 10 tons/acre, the resulting boron rate of 0.3 lbs./acre may not be sufficient for high-boron requiring crops, such as alfalfa. Supplemental boron applications should be based on yield goals for the specific crop and on results of soil tests and/or plant analyses.

Learn More
Effects of sodium in borax on soils and crops

Effects of sodium in borax on soils and crops

Sodium is found in all soils and crops. Soils in humid regions, where most boron (B) deficiencies occur, contain about 50-150 lbs./acre of sodium in the surface 6-inch layer, but soils in drier regions may contain higher levels of sodium. While borax contains some sodium, one lb. of B/acre as borax only supplies about 0.9 lbs. of sodium/acre. Application of boron at recommended rates would result in an application of only 1-2 lbs. of sodium/acre, which would not significantly affect soils and crops.

Learn More
Fertilize before boron deficency symptoms occur for optimum yields

Fertilize before boron deficency symptoms occur for optimum yields

Visual symptoms of boron deficiency may not occur until the deficiency has become moderate or severe. At this stage, slower growth may have reduced the yield potential for the crop. Use the results of soil tests and/or plant analyses to help assess the potential for boron deficiencies to ensure adequate boron supplies for the crop.

Learn More
Plant tissue testing for boron

Plant tissue testing for boron

Plant analysis can be a valuable tool in determining the general nutritional status of crops during the growing season. Accurate interpretation of plant analyses data requires that plant tissue samples be carefully collected and handled prior to shipment to the laboratory. Knowledge of the normal boron sufficiency range in a given crop helps to interpret the analytical results and to diagnose a possible boron deficiency.

Learn More
Soil tests for available boron

Soil tests for available boron

Boron deficiencies may be suspected on coarse-textured soils where organic matter content is low, on soils with a pH above 6.0, and on recently limed soils. Soil testing and plant analyses are both helpful in assessing the potential boron-supplying capacity of the soil and the current boron status of the plant. Recent research has shown that three commonly used soil tests, the Mehlich-1 and -3 tests and the DTPA test modified to include sorbitol, also may be used to determine available boron in soils. The hot water test (HWT) is the most common, however. The critical value of available boron in a soil test may be affected by soil and the environment, which must be considered in interpreting soil test results.

Learn More

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

Copyright © 2018 Rio Tinto. All Rights Reserved.