Abstracts

SWIFT, C.E. 1987. Iron chlorosis and its cure. Am. Nurseryman 166(11): 125-129.

Iron is extremely abundant in US soils. Yet iron deficiency is a problem for many plants. To change a soil’s pH, adding elemental sulfur, polysulfides or sulfuric acid is sometimes recommended. A chelated iron should be considered to correct an iron deficiency problem. Materials that work extremely well in alkaline soils (above pH 7.0) are the EDDHA chelates. The EDDHA chelates are 100% stable at pH levels from 4.0 to 10.0. Apply soil applications six inches deep, spaced evenly around the plant. Start about halfway between the trunk and the drip line and extend well beyond the dripline to cover as much of the absorbing root system as possible. Apply iron chelates early in the season. Chelates applied in July or August, after chlorosis is severe, may not produce the desired results.

HAMMOND, CECIL. 1987. Save money and lives by using equipment properly. Am. Nurseryman 165(3): 126, 128-129.

Machines, like people, last longer when they receive proper care. A careless operator not only increases machine operating costs but can also increase insurance and hospital bills. Read the manual carefully to familiarize yourself with the machine and to promote a safe and productive operation. When your conditions are not average, adjust maintenance practices accordingly. Machines kept under a roof look newer longer. This also increases the life of plastic parts and rubber components, such as tires, hoses and seats. With proper attention to maintenance and good safety practices, your nursery’s machines can work at peak efficiency and your employees will be protected from injury.

• © 1988, International Society of Arboriculture. All rights reserved.