Newly Posted Articles

WALNUT SHELLS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is now available commercially in two sizes; refer to A85-516 Read More

CROWN ROT: In Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The cause may be 1, too high nitrogen level during cult ivation of the seedlings; use Electric Conductivity reading of not more than 0.6, with a nitrogen to potassium proportion of 1:1:2. 2, Night ... Read More

CROWN ROT: In Phalaenopsis Seedlings

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A preventive is Benlate as a spray or light drench; 1 ttpg.; A74-300; also, use Natriphene. OR69-272 Read More

GREENHOUSES: Floors

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The ideal is a floor dug down to three feet, filled in with a foot of large stones and two feet of pebbles; concrete and dirt floors tend to lower humidity. OIg88Feb-3 Read More

GREENHOUSES: Glass Type Recommended

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A double-thick, regular, clear "B" quality glass is good. A64-975 Read More

GREENHOUSES: Heat Control

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Redistribution of the hot air in the apex of the house to the bench level is achieved by using the "Equal Heat" mechanism, for explanation refer to OR84-409 Read More

GREENHOUSES: Heat Loss Calculation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A simple method: the heat loss in BTU's per hour is equal to the square feet of the glazed area X the temperature lift (raising greenhouse temperature above the average outside temperature) X 0.44 ... Read More

GREENHOUSES: Heating

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Transmission coefficients for materials; for a list of 34 materials and the degrees of heat loss; refer to OD71-192+ (See also Heating). Read More

GREENHOUSES: In Canada

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Problems of light and temparatures as they affect culture and structures in special areas devised to provide optimum conditions, refer to Wll-347 Read More

IRON: Deficiency

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In mi Itonlopsis it shows up as either blotchy leaves or as leaf tips faded from loss of green pigment; use a half dose of Sequestrol one day after heavy watering. OIE85My-3 Read More