Iha Education April 2010 Webinar - Plant Products

Ammonium toxicity occurs when blends with high urea as a component are used

High N competes with P

Sometimes nitrogen deficiency shows up on foliage as chlorosis and reddening

High ammoniacal N inhibits Ca and Cu uptake

True

False

Mg is part of the chlorophyll molecule

Mg deficiency is seen on the lower leaves first

Uptake of Mg is affected by K, Ca, MN, NA and NH4

All of the above

A & B

True

False

Electrical conductivity

Alkalinity

Concentrations of CA & Mg

All of the above

True

False

Often show iron deficiencies

Thrive with a nedia pH lower than 6

Thrive with medium to high light levels

All of the above

Higher levels of Magnesium

Higher levels of Manganese, zinc and iron

Lower level of Phosphorus

B & C

All of the above

Is also known a no stretch

Can be used to decrease the media pH

Is the same as 20-10-20

All of the above

True

False