A new type of greenhouse with linear Fresnel lenses in the cover performing as a concentrated photovoltaic (CPV) system is presented. The CPV system retains all direct solar radiation, while diffuse solar radiation passes through and enters into the greenhouse cultivation system. The removal of all direct …

It all began with ̈Celebration® Karneval® ̈ from Westhoff, a Calibrachoa mix consisting of three different colours. The result in red, yellow and blue was so convincing that it became the trend-setter for what nowadays is marketed under the name "combi-pots". These are colourful combinations, either …

Cost price efficiency is key in competing in the modern horticultural industry. Over the past four years I came to realize that bulb cultivation and the cultivation of bulb flowers is accompanied by major risks, as it is difficult to fine tune the product’s quality. Seasonal influences affect bulb growth, …

Field experiments were carried out in 1991 and 1992 on sandy soil highly infested with the potato cyst nematode Globodera pallida. Half the trial area was fumigated with nematicide to establish two levels of nematode density. Three levels of soil compaction were made by different combinations of artificial …