Boron

Boron is important in sugar translocation and carbohydrate metabolism. It is particularly needed at the location of active cell division and plays an important role in flowering, pollen-tube growth, fruiting processes, N metabolism, and hormone activity. Boron also maintains Ca in a soluble form; thus, ensuring its proper utilization.

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Sulfur

The Sulfur concentration in a citrus tree is approximately 10 times less than the Ca concentration, and it is about equal to the P concentration. The uptake and assimilation of S and N by plants are strongly interrelated and depend on each other because of their mutual occurrence in amino acids and proteins. Sulfur is an essential constituent of many proteins, vitamins, and some plant hormones. As a result, protein synthesis and amino acid and chlorophyll production are retarded in S-deficient plants. Sulfur is also known to enhance the development of nodules and N fixation by legumes, indicating its importance in root growth and development as well as in root vigor and hardiness. Sulfur also affects carbohydrate metabolism. Sulfur is a major component of soil organic matter and becomes available to plants as organic matter decomposes. Sulfur is also present in some irrigation water sources.

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Calcium

Calcium is the most abundant mineral element by weight in citrus trees, accounting for approximately 1% of tree dry weight. Most Ca resides in the leaves, but fruit also contains Ca at a level of approximately 4.4 lb. per 100 boxes of oranges. Calcium is involved in cell division and cell elongation, is an important constituent of cell walls, and plays a major role in cell membrane integrity.

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Helping Citrus Grow Healthy

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