**Acknowledgements**

*Sustainable Crop Production*

in optimizing photosynthesis, photomorphogenesis, and nutrient contents. LEDs make easier monitoring of nitrogen absorption by leafy plants and avoid harmful

Urban farming is carried out mainly hydroponically (NFT system or rockwool) with or without daylight with complete controlled environment [10], which bring some benefits like controlled usage of water, nutrients, pesticides multiple crops per

Urban farming provides remarkable reduction in electricity cost for transplants production by using thermally insulated walls, multi-shelves, advanced lighting

Urban farming enables vertical production of propagation plant material and regular crop production in fully controlled environment. It means that the area for urban farms can be various. It can be placed in supermarkets, or other places where people gather and want to refresh with fresh vegetables or fruits, for example. Urban farms can be smaller or larger areas (e.g., of several square meters), and with vertical cultivation, the crop yield is achieved as in larger areas (e.g., in modern

Further development of LED lightning in horticulture, especially in vegetable production, would bring many advantages in producing clean, safe, health food for

nitrate concentration in leafy plants and its influence on human health.

year, high quality of edible parts, less labor, and easier harvesting.

greenhouses or completely controlled objects without sun light).

and air conditioning systems, etc.

*LED lightning in protected area without day light.*

**312**

**6. Conclusion**

**Figure 3.**

humans, but for animals, too.

Dubravka Savić would like to express her special gratitude to her colleagues Prof. Dr. Milivoj Belić (Faculty of Agriculture, University of Novi Sad) and Prof. Dr. Žarko M. Ilin (Faculty of Agriculture, University of Novi Sad) for the participation in the project titled "Development of new technologies for modern and sustainable production of vegetables" (TR31036) funded by the Ministry of Education and Science, Republic of Serbia. Part of the project has been dedicated to investigation of LED lightning in vegetable production indoors and in the greenhouses.
