Question

What is labelled as A and what is the pH of media A?

• A. Nutrient solutions with essential minerals with pH 5
• B. Nutrient solutions with essential minerals with pH 6
• C. Water with essential minerals with pH 7
• D. Water with pH 7

Answer 1

The correct option is A Nutrient solutions with essential minerals with pH 5

Hydroponics is the art of growing plants in a nutrient medium of defined concentration. This technique was first developed by Von Sachs and has been successfully demonstrated for lettuce, tomato etc. It is also called as soil less cultivation.

The two main types of hydroponics are solution culture and medium culture. Solution culture does not use a solid medium for the roots, just the nutrient solution. The three main types of solution cultures are static solution culture, continuous-flow solution culture and aeroponics.

The ideal pH range for most hydroponic crops is between 5.5 and 6.5. pH is important because it affects availability and absorption of several of the 17 atomic elements needed for plant growth. Maximum absorption of these elements is found at pH readings 5.5 to 6.5. When pH falls below this range many of the macro elements (N, P, K, etc.) have less availability, and absorption of the micro nutrients can reach toxic levels.