Plant Nutrition:
Depending upon the amount of each nutrient required the mineral nutrients are divided into …….groups
a) two
b) three
c) four
d) five
Explanation: micronutrients and macronutrients (primary and secondary)
Which of the following are the primary macronutrients in plant nutrition?
a) N, P, K
b) Ca, Mg, S
c) B, Cu, Fe, Cl
d) Mn, Zn, Mo, Co, Na
Explanation: these are less in soil because plants use them in large amounts
Which of the following are the secondary macronutrients in plant nutrition?
a) N, P, K
b) Ca, Mg, S
c) B, Cu, Fe, Cl
d) Mn, Zn, Mo, Co, Na
Explanation: these are present in soil in large quantity
Macronutrients tend to be..…available in soils with low pH.
a) high
b) less
c) moderate
d) independent of pH
Explanation: lime can be added to increase the pH and thus nutrients
Micronutrients tend to be ………available in soils with high pH.
a) high
b) less
c) moderate
d) independent of pH
Explanation: lime raise the pH 6.0 to 6.5
