NITROGEN: The Most Important Element

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 4 years ago.

Article Blog   Article Index
It needs traces of molybdenum for its assimilation by plants; it has an effective range from pH 5 to 9; below or above that, the plant is unable to use it sufficiently. OA78-50; no, this is not true. OWD
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Nitrogen

Nitrogen Comments
NITROGEN: Ammoniacal Source Urea nitrogen is not as readily usable as ammoniacal nitrogen and ammonium nitrate was added to a commercial fertilizer before application. OIE-RMH 0
NITROGEN: Best Amount for Cattleyas For cattleyas grown in glass marbles 50 ppm. is good; optimal is 100 ppm. equivalent to 4.5 oz. of ammonium nitrate in 100 gals, water, quite low; one oz. in 7,830 gals, is 1 ppm. C72-223; OA79-129; OR74-135 0
NITROGEN DEFICIENCY: In Bark The function of organisms; leaf coloring significance; growth; correction; for analysis, refer to A67-472+ 0
NITROGEN: Function as Fertilizer Large amounts are required for continued production of new cells. AU75-45Used by the plant to make healthy green leaves and stems; it promotes strong green foliage. A70-139Used in excess of requirements it causes plants to grow soft and dark green; will not produce good flowers; bifoliate cattleyas such as C.Portia and C.Porcia do not require as much nitrogen as the regular unifoliates. A71-400Used in increasing amounts, it is found that dramatic reduction in growth in cattleyas follows an increase in nitrogen levels; possibility of a limiting factor exists. OA79-131+; absolutely wrong. OWD 0
NITROGEN: Optimal Amounts 100 parts ppm. appear to be optimal for phalaenopsis and cymbidiums, for cattleyas, 50ppm. SA85-168 0
NITROGEN: Parts Per Million for Maximum Growth Experiments indicated that 113 or 114 ppm., or approximately 100 ppm., equivalent to 4.5 oz. of ammonium nitrate in 100 gals. water was best. OR74-135 0
NITROGEN: Properties Regardless of application to non-orchids, final form taken up is mostly nitrate, readily absorbed by roots; readily leached from soil; forms no insoluble complexes. OD67-219; this does not hold for most orchids -- NH4 is used as readily as N03. OWD 0
NITROGEN SHOCK: Reducing Nitrogen Sharply in August In the Midwest, where cool August nights seldom occur, buds can be initiated for winter flowering by the reduction of nitrogen; applied to cymbidiums. A67-12 0

New Topics

  1. Robert H. Findlay asked question sideways images in category Site Navigation
  2. Khanh tran asked question Arranges Elro in category General Discussion
  3. John Small asked question Which is correct? in category General Discussion
  4. Jean Seymour asked question Can someone give me the name of this orchid? in category Phalaenopsis
  5. Debbie Chase asked question Help to Identify Orchid in category General Discussion

New Comments

  1. Carol Holdren commented on topic "sideways images" by Robert H. Findlay
  2. John Small commented on topic "Which is correct?" by John Small
  3. Mo Chen commented on member plant Holc. kimballianum by Mo Chen
  4. Carol Holdren commented on topic "Arranges Elro" by Khanh tran
  5. Fran Fassman commented on orchid E. Thomas Fennell
  6. Lauren Hutchison commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  7. Lauren Hutchison commented on member plant Oip. Celtic Sun 'Maya' by Dex W
  8. Lauren Hutchison commented on member plant Phalaenopsis Tristar by Lauren Hutchison
  9. Lauren Hutchison commented on member plant Phal. OX Golden Apple 'Honeycrisp' by William Gorski
  10. Debbie Chase commented on topic "Help to Identify Orchid " by Debbie Chase
  11. Tien Pham commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  12. Carol Holdren commented on topic "Can someone give me the name of this orchid?" by Jean Seymour
  13. Carol Holdren commented on member plant Spathoglotis plicata (Ground Orchid) by Frances LaVigne
  14. Frances LaVigne commented on member plant Grt. Rosy Jewel var. alba by Frances LaVigne
  15. Barry Mellefont commented on article "ANTS: Nesting Between Osmunda and Bark Slab Requires Control Safe for Visiting Hummingbirds" by Robert M. [Bert] Hamilton (Compiler)
  16. Carol Holdren commented on member plant Bc. Jairak Kiku 'Jairak kiku' by Frances LaVigne
  17. Frances LaVigne commented on member plant C. purpurata var. (flammea x sanguinea) by Carol Holdren
  18. Frances LaVigne commented on member plant Ascda. Kulwadee Fragrance by Frances LaVigne
  19. Melvin Waki commented on member plant Hwra. Lava Burst by Jeanne M Uzar
  20. Carol Holdren commented on member plant Den. Ruth Chun's Gemini by Melvin Waki