Boron concentration is irrigation water is considered safe only upto_________________?
Correct answer: A. 0.7 ppm
- A. 0.7 ppm
- B. 1.5 ppm
- C. 2 ppm
- D. 3 ppm
Explanation
Boron is needed in trace amounts but becomes toxic relatively easily, so irrigation water containing up to about 0.7 ppm is generally considered safe for most crops. More boron can cause leaf-tip and leaf-margin scorching, especially in sensitive crops.
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