Drip Irrigation – Chlorination and Acid Injection

Drip Irrigation – Chlorination and Acid Injection

Chlorination Chlorination must be used routinely to kill algae and loosen bonded organic matter within an irrigation system. Liquid sodium hydrochloride is the recommended chlorine source and it is injected into the system during regular operation, usually using the fertigation … Continued
Artificial lighting

Artificial lighting

Like many other environmental factors such as humidity, temperature, moisture and nutrients, light determines the rate of plant growth as well as the way in which the plant develops. Artificial lighting can be successfully used to supplement natural light. Greenhouses … Continued
How do you decide what fertiliser your crop needs?

How do you decide what fertiliser your crop needs?

Soil tests Soil testing provides a guide to the general health of condition of a soil. Chemical and physical tests are available. A test will show where there are sufficient reserves of some major nutrients to carry the crop through … Continued
Temperature control and how it relates to flower quality

Temperature control and how it relates to flower quality

I can clearly remember Professor Mike Reid at the University of California, Davis giving one of his regular lectures about Flower Care – and he said “The three things to remember when handling flowers are temperature, temperature and temperature!!” Fresh … Continued
Thermal and Shade Screens

Thermal and Shade Screens

A thermal screen is a moveable internal lining placed between a crop and the greenhouse cover. The usual strategy for the operation of a screen is for it to be expanded or spread out in position above a crop during … Continued
Checking an existing fertiliser program

Checking an existing fertiliser program

The 20% test — One way of simultaneously evaluating and fine-tuning a nutritional program is to compare the performance of plants receiving 20% or more and 20% less than the current fertiliser rate. The three treatments – current rate less … Continued
All About Thrips

All About Thrips

Thrips are small, slender insects. They have soft bodies ranging from 1-2mm. Adult thrips have two pairs of narrow wings fringed with long hairs. Immature thrips are pale yellow to white in colour. Adults can be pale to dark. Eggs … Continued
Non-nutritional stresses on flowering plants

Non-nutritional stresses on flowering plants

Non-nutritional stresses can cause nutrient-like symptoms in leaves, flowers or other tissues. However, the resemblance is often only superficial and basic differences in the patterns can be seen when the specimen is examined closely. Non-nutritional symptoms can arise from environmental … Continued