define the term "10 mmole per kg of dry matter" and also write and explain when the elements is termed as macro or micronutrient. Need the answer very urgently!

Dear student,
Please find below the solution to the asked query

The given statement means that the concentration of the minerals like trace minerals required by plants is 10 millimole (one thousandth of a gram-molecule) per kilogram of dry weight (material remaining after removal of water). In other words, the plant requires 10mmoles of trace minerals per kilogram of dry matter/weight for proper growth and development.

Nutrients that are required in relatively large quantities for the growth and development of plants are called macronutrients. For example, Nitrogen, potassium, phosphorus, calcium, magnesium and sulphur.
Nutrients that plants require in relatively low quantities are called micronutrients. For example, Iron, manganese, boron, zinc, copper, molybdenum and chlorine.

Hope this information will clear your doubts about the plant nutrition.
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