Question 1
Which of the following sources of Mg can be recommended for use in the horticultural industry?
◦ kieserite
◦ struvite
◦ kainite
◦ langbeinite
Question 2
Which of the forms of S in soils reduces exchangeable Na content and improves water infiltration, while supplying S?
◦ ammonium polysulfide
◦ calcium thiosulfate
◦ ammonium thiosulfate
◦ potassium sulfate