Productivity and Quality of Kohlrabi Grown in a Newly Reclaimed Sandy Soil Using Organic and Mineral-N Fertilizer regimes with or without Spraying of Spirulina platensis Extract

Abstract

Kohlrabi (Brassica oleraceae var. gongylodes) is an edible plant belongs to Brassicaceae family. Kohlrabi is considered as a cole crop with enlarged stem (knob) as an edible portion. Because of the high contents of knobs in vitamin C, potassium and antioxidant substances, enormous nutritional and medicinal values have been highlighted (Dhaliwal, 2017). It is widely cultivated in European and American countries, having a short growing season with high exportability. However, no available data about cultivation and consumption of this valuable vegetable in Egypt even a very limited area was cultivated randomly.