Category: Orchid Doctor

ULTRAVIOLET LIGHT: Sterilizing Agent

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is used for sterilizing air in a chamber; do not expose bare skin to it; it will kill plant tissue, and seed. A73-709 Read More

ULTRAVIOLET REFLECTANCE PHOTOGRAPHY: Visible Photography Differs From the Ultraviolet

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A reliable technique to determine pattern changes; with a list and percentage changes; possibilities surmised. A81-53 Read More

UNIVERSITY OF CALIFORNIA MIX: Ingredients

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago As used in New Zealand: two imperial gals. of no.1 fresh-water sand and six gals. of sphagnum peat moss sieved small; add two oz. hoof and horn meal, 1.5 oz. single superphosphate, 1/2 oz. sulphate... Read More

UNPOTTING: Meaning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Knocking the pot off the root-ball in order to inspect the roots. A78-112 Read More

URAMITE: Nitrogen Additive to the Soil

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A yellow granular substance composed of a mixture of methylene ureas with an analysis of 38% nitrogen; is released slowly by disintegration through the growing season. A78-717 Read More

UREA SOLUTION: Painted on Seed Pods

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A 2% solution painted on pods every two weeks strengthens, toughens the pods and peduncles and enlarges the seeds and quickens their growth after flasking. NH78(1)-14 Read More

UREA: Description

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago An organic nitrogen which has to be transformed in the root-area and which requires organic activity to do so, the right temperature and some time; Rockwool and Oasis hardly use it up because it is... Read More

UREA: Fertilizer

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A good cheap source of nitrogen ; it does not readily combine with other elements to produce salts nor does excessive amounts cause too much damage to the plants. OR80-185 Read More

URINE: As Orchid Manure

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago By far the best manure for orchids; dilute it one to 10 with water; contains all the necessary salts and certain growth-promoting substances; refer to Holttum: Orchids of Malaya, I (1946) 37 Read More

VACUOLES: In Flower Segments

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The change of color of a specific anthocyanin molecule results from the difference in the pH, which is largely genetically controlled. A83-1058 Read More