Question 1
In a turfgrass production, the application of which of the following elements improves winter hardiness in northern climates and is also beneficial in southern climates?
◦ potassium
◦ phosphorus
◦ sulfur
◦ nitrogen
Question 2
The soil profile after a vegetable harvest shows increased soil pH and reduced
toxicity in acid soils by complexation with OM. Which of
the following methods being used would cause these conditions?
◦ optimal use of residual fertilizers
◦ usage of animal manures
◦ practice of fertigation
◦ intensive tilling and fallowing