In which of the following, all three are macronutrients?
(1) Iron, copper, molybdenum
(2) Molybdenum, magnesium, manganese
(3) Nitrogen, magnesium, phosphorus
(4) Boron, zinc, manganese
Which is essential for the growth of root tip?
(1) Zn
(2) Fe
(3) Ca
(4) Mn
Select the mismatch.
(1) Frankia Alnus
(2) Rhodospirillium Mycorrhiza
(3) Anabaena Nitrogen fixer
(4) Rhizobium Alfa-fa
1. | Ferric | 2. | Ferrous |
3. | Free element | 4. | Both ferric and ferrous |