suicide

lab quiz 1

intermittent mist

intermittent mist

cools the atmosphere and covers leaf surface to reduce plant/seed water loss

how does misting reduce leaf transpiration

reduction in leaf temperature and maintains high humidity conditions at the leaf surface

dry fog size

10-20 microns

wet fog size

20-30 microns

mist size

30-60 microns

spray size

60 microns

how do small orifice nozzles work

liquid is forced through tiny orifice at high pressure breaking it up into small droplets

how do impingement/deflection type nozzles work

solid stream of fluid hits pin and breaks the fluid into fine droplets where it then disperses

misty mist

deflection; volume rated at .17 gallons per minute at 36 psi and .22 gallons at 73 psi - 6ft spray pattern

pin perfect

deflection; .80-1.27 gallons per minute depending on pressure, 10 ft spray pattern

phytomist

deflection; most efficient at 40-50 psi

electronic leaf with electrode

as water evaporates sensor switches to open position triggering irrigation

electronic leaf with balance

water weights leaf down which triggers sensors turning off solenoid, water evaporates and activates solenoid triggering irrigation

static timer

timers set manually to run for predetermined amount of time

Pb/bulk density

dry weight of substrate per unit of volume in g/cm3

total porosity/E

water added to substrate/total container volume x 100

Pv / volumetric moisture content

percent total porosity - percent air space = percent water holding capacity

Ea / air filled porosity

drained water/total container volume x 100

where do you apply auxin on plant

basal 1/4 to 1/2 in - dilute soak basal 1 in

how long to liquid quick dip

5-15 seconds

softwood/herbaceous iba concentration

500-1,250 ppm

semi-hardwood iba dip ppm

1,000-5,000 ppm

hardwood iba dip ppm

1,000-5,000 ppm

hormodin 1 ppm

1,000 ppm

hormodin 2 ppm

3,000 ppm

hormodin 3 ppm

8,000 ppm

how far to space cuttings

2-4in

nodal cut

basal cut below node - helps prevent fungal rot and increases root production

internodal cut

reduces fungal growth in wide pithed or hollow pithed species

herbaceous cuttings

3-5in but can vary depending on species - cut basal end at an angle, keep foliage off substrate and keep wet

terminal cutting

contains a terminal bud (top of plant)

medial cutting

no terminal bud

single eye cutting

alternate leafed plant

double-eye cutting

opposite leaf plant

split node cutting

splitting of the node on an opposite leaf plant

higher pressure results in

smaller droplet size

most efficient height of mist nozzle

short

most efficient nozzle head

pin perfect

percent porosity bmp

50-85%

percent air space bmp

10-30%

water holding capacity bmp

45-65%

sand had

too little air space and too much water holding

best rooting medium

promix or verm