Lecture 11 Flashcards
what is an artificial source of micronutrients?
May be in low-analysis (e.g. 5-10-5) fertilizers as impurities or fortified in high analysis fertilizers (e.g. 20-20-20)
what is a natural source of micronutrients?
organic fertilizers (e.g. seaweed, bone meal)
what form is B in when absorbed?
borate (BO42-)
what is the role of B?
flowering, fruits, cell division, translocation (movement of nutrients through the plant)
what are the deficiency symptoms of B? (6)
Tip die-back
witches-broom
Light green buds
roots are brown in center
Fruit is corky or brown in center
Flowers may not form
what form is Mn in when absorbed?
Mn2+
what is the role of Mn?
chlorophyll synthesis, enzyme activation & carb metabolism
what are the deficiency symptoms of Mn?
interveinal chlorosis
Spots or mottling on leaves
Dwarfed plants
what form is Zn in when absorbed?
Zn2+
what is the role of Zn?
enzyme activation
what are the deficiency symptoms of Zn? (4)
Terminal leaves are small
Poor bud formation
short internodes
Interveinal chlorotic mottling
what form is Fe in when absorbed?
Fe2+ or Fe3+
what is the role of Fe?
Component of enzymes & catalyst for chlorophyll synthesis
what are the deficiency symptoms of Fe?
Interveinal chlorosis turning to white in severe cases
young tissue affected first
Fe deficiency is seen in soils with _______ pH
low
