Category: Culture

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

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

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

VACUUM CLEANER: To Clean Up Spent Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The pincushion flowers of Maxillaria vitelliniflora which fall down among the foliage can be removed thereby. ODA78(l)-28 Read More

VAPOR BARRIERS: Paints to Apply to Concrete Blocks

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are asphalt-based and rubber-based and are satisfactory, but damp walls in a greenhouse are beneficial in maintaining humidity so why use them? A66-927 Read More

VENTILATION: Rate of Exchange

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago On hot days the greenhouse needs one change of air per minute by exhaust fans. A78-606 Read More

VINEGAR: To Correct the Ph of Water

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is not recommended because acetates can be toxic to plants. A78-13 Read More