The Orchid Doctor Articles under the Heading Parts Per Million

Parts Per Million Comments
PARTS PER MILLION: A Scientific Measurement Frequently applied to fertilizer recommendations; such as for cattleyas -- 50ppm of Nitrogen, 20ppm. of Potassium, 50ppm. of Phosphorous, plus 50ppm. of Magnesium Sulphate; one part per million is the equivalent of one ounce in 7,380 gallons of water; lOOppm. is equivalent to 4.5 ounces in 100 gallons. RMH 0
PARTS PER MILLION: Equivalents One part per million (ppm.) is one ounce in 7,830 gallons of water; lOO ppm. is equivalent to 4.5 oz. ammonium nitrate in 100 gals. C72-223; OR74-135 0

New Topics

  1. Tammy Bennett asked question LOOKING to BUY -Phalanopis “Dragon Tree Maple” in category Scientific
  2. Rae Walker asked question Dendrobium No I’d. HELP! in category Dendrobiums
  3. John Hyatt asked question Deformed growths on BLC King of Taiwan in category Cattleya Alliance
  4. Darrin Duling asked question Unidentified Bratonia in category General Discussion
  5. Armando Mantellini started topic Cattleya jenmanii missing awards in category Cattleya Alliance

New Comments

  1. Carol Holdren commented on topic "Dendrobium No I’d. HELP!" by Rae Walker
  2. Carol Holdren commented on article "CATTLEYAS: Control of Blooming Time" by Robert M. [Bert] Hamilton (Compiler)
  3. Carol Holdren commented on member plant Lc. Nice Holiday 'Suntopia' by William Gorski
  4. Robert H. Findlay commented on topic "Phragmipedium Cape Sunset or Eric Young?" by Darrin Duling
  5. Robert H. Findlay commented on member plant Phrag. Ecuagenera Dream by Robert H. Findlay
  6. Tatjana Opekunova commented on article "CATTLEYAS: Reasons for Non-flowering" by Robert M. [Bert] Hamilton (Compiler)
  7. Carol Holdren commented on member plant Zygopetalum var. Big Red One by Wyatt Parker
  8. Carol Holdren commented on topic "Need ID, Please" by Oliver Quin Surco
  9. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  10. Debbie Chase commented on topic "Identify This Orchid " by Debbie Chase