Role of Ca, Mg and S

Q.

Chlorotic patches appear due to deficiency of:

1. S

2. Fe

3. Ca

4. Na

Q. Which is essential for the growth of root tip?

1. Mn
2. Zn
3. Fe
4. Ca

Q. Auxins are known as photophillic hormones ? Give sutiable reasons to prove this statement. Also state whether it is true or not?

Q.

Element present in middle lamella

1. K

2. Ca

3. Zn

4. Cu

Q.

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause a decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1. Frequent irrigation of the crop

2. Treatment of the plants with cytokinins along with a small dose of nitrogenous fertiliser

3. Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

4. Application of iron and magnesium to promote synthesis of chlorophyll