SOIL BORON

The most common micronutrient deficiency in the soil worldwide is Boron

Boron is associated with the soil organic matter and with many years of tilling our lands the organic matter in the soil has decreased, and therefore, the principal source of BORON has also substantially decreased.

As the soil pH increases above 6.5 it is noted that Boron decreases.

In high rainfall regions Boron is leached from the soil.

Most crops require approximately 2-3 lbs. of BORON per acre.

The amount of boron in soil is directly proportional to the amount of organic matter. Therefore, highly commercial fertilized crops provide much smaller quantities of boron.

Ways to overcome Boron deficiencies

1. With foliar sprayings.
2. Boron applications before planting and then side dressings.
3. Sources of Boron:

Boric acid with 17% Boron

Borax with 11% Boron

Sodium pentaborate with 18% Boron

Sodium tetraborate with 21% boron

Liquid Boron contains low amounts around 2% to 4%

Symptoms of deficient Boron

1. Abnormal growing parts
2. Leaves are retarded with thicker and wrinkled.
3. Are a darker color.
4. Plant is brittle because of poor cell wall formation.
5. With grasses you will see spiral or twisted leaves.
6. Broad leaf plants will have their tips malformed, and they need more Boron than what grasses require.

How Boron will interacts with other elements in the soil and plants.

1. For proper plant growth Calcium and Boron must be in balance. When they are not in balance the plant will not process properly.
2. Phosphorus will not process correctly into cells with low quantity of Boron. Plants that are low in Boron will not adsorb Phosphorus properly at the roots.
3. Too high levels of Nitrogen and Potassium will decrease the Calcium/Boron ration in plants.
4. Conflicting with the above mentioned- watermelon requires high Calcium and regular amount of Boron.

Crops that need high Boron levels are:

Turnips

Broccoli

Cauliflower

Cabbage

Brussel sprouts

Alfalfa

Clover

Asparagus

Sugar beet

Celery

Apple

Pear

Grape

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