Question 1
Which of the following is true regarding visual S-deficiency symptoms in plants?
◦ S-deficiency symptoms often occur first in younger leaves.
◦ S-deficiency causes thickening of plant stems.
◦ S-deficiency results in dark green leaves turning into light green.
◦ S-deficiency inhibits development of shoot terminal buds.
Question 2
Which of the following Mg-containing fertilizers has a Mg plant nutrient content of 25%?
◦ epsom salt
◦ langbeinite
◦ magnesium oxide
◦ magnesium chloride