In the case of any two of the following, describe a laboratory or a field method: (a) To show the effect of a mineral deficiency on crop growth. - Leaving Cert Agricultural Science - Question 4 - 2019

To demonstrate the effect of a mineral deficiency on crop growth, you can implement the following methods:

1. Laboratory Method Using Flasks:

   • Prepare two sterile flasks and fill them with deionized water.
   • Introduce seedlings to both flasks.
   • In one flask, add a nutrient tablet while leaving the other flask as a control (without nutrients).
   • Ensure both flasks are aerated and covered.
   • Leave the experiment to run for at least two weeks.
   • After the period, compare the growth results of the seedlings from both flasks, noting any differences due to the mineral deficiency in the control.

2. Field Method Using Soil:

   • Prepare two plots of fertile soil, ensuring that one is deficient in the specific mineral you want to study.
   • Sow an equal number of plants in both plots under similar conditions, ensuring both are grown for the same length of time.
   • Upon harvesting, observe and compare the growth and health of the plants from both plots, noting any adverse effects attributed to the mineral deficiency.