Protected cultivation

The PowerPoint presentation provides a comprehensive overview of greenhouse technology and its significance in horticulture. It begins by defining greenhouse technology as a method to shield plants from adverse climatic conditions while optimizing essential growth factors such as light, temperature, humidity, CO2 levels, and air circulation. Various greenhouse structures are discussed, including multi-span types like Venlo, saw tooth, wide span, and arched designs, categorized by their shape and covering materials, which can be flexible (e.g., polythene, shade nets) or rigid (e.g., glass, polycarbonate sheets). The presentation also highlights the materials used for constructing greenhouses, such as galvanized iron (GI), mild steel (MS), and wood.

Ventilation methods are categorized into natural and mechanical systems, with specific types like gutter ventilation and fan and pad systems mentioned. The concept of protected cultivation is introduced, emphasizing its role in creating favorable microclimates for plants, thus allowing for year-round production and higher yields compared to outdoor cultivation. The advantages of protected cultivation are outlined, including increased reliability of crops, the ability to produce disease-free transplants, and efficient use of resources like water and chemicals.