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Welcome to the official youtube channel of Birsa Agricultural University, Ranchi The productivity and quality of any produce is affected by genetic material, agronomical management and environment management. It is possible to cultivate any crops in any region of the world, provided that the polyhouse is properly designed and equipped to control the climatic parameters. The crop cultivated in the protected structure affects its economic viability. There is greenhouse effect in polyhouse with plastic film due to two different effects i.e. (i) a confinement effect, resulting from the decrease in the air exchanges with the outside environment; and (ii) an effect caused by the existence of a cover characterized by its low transparency to far infrared radiation (emitted by the crop, the soil and the inner greenhouse elements), but its high transparency to sunlight. Due to GH effect, the temperature inside the polyhouse is always more than the open field environment. The polyhouse works effectively during winter & rainy season but major challenges occur during summer season due to high temperature & light intensity. Though technologies are available to reduce the temperature inside the polyhouse during summer season but major challenges are fixed and operating cost. The major protection needed for cultivation are temperature [soil (minimum & maximum), air (minimum & maximum)], relative humidity, light (intensity & spectrum), carbon dioxide, wind speed, insect & pest management, rainfall, hill storm, snow, irrigation, weed management etc. The protection needed during cultivation depends upon the season of cultivation. Depending upon the requirement one or more parameter can be controlled or modified. It is also very important to understand the activities need to be conducted under protected system i.e. cultivation or nursery raising or drying etc. The other vital point need to be considered are activities month i.e. January, February, March, April, May, June, July, August, September, October, November, December. It may be that protected system need only for two months or may be five months or whole year. For example if someone wants to grow the vegetable nursery during peak winter season to protect from low temperature (soil & air), he may require protection only during December & January. The protection system that can be utilized are of two types i.e. category I (Medium cost natural ventilated polyhouse, Low cost multi-purpose polyhouse, Low cost detachable roof polyhouse, Low cost temporary shade net house, Rain shelter, Rain shelter & shade net structure, Protected structure with peripheral insect proof net, Plastic mulching, Drip/sprinkler irrigation etc.) and category II [Plastic low tunnel with different cladding materials (plastic film, shade net materials, insect net proof, crop cover etc.)] The enterprises or activities that can required protected system are cultivation [Conventional crops (tomato, capsicum, cucumber etc.), coriander leaf, spinach, cabbage, cauliflower etc.], Nursery raising (vegetables, fruits, flower), Drying etc. So, depending upon the enterprise or activities and utilization month, the proper protected system can be selected. The profitability and sustainability of enterprise or activities are very vital issue while selecting the protected system. For further clarity one can also see other videos: 1. Protected cultivation ( • Protected cultivation ) 2. Low cost temporary shade net structure ( • Low cost temporary shade net structure ) 3. Low cost detachable roof green house (GH) ( • Low cost detachable roof green house (GH) ) 4. Low cost multipurpose greenhouse (MGH) ( • Low cost multipurpose greenhouse (MGH) ) 5. Low Cost Plastic Low Tunnel- प्लास्टिक का गुफा नुमा घर ( • Low Cost Plastic Low Tunnel| प्लास्टिक का ... ) 6. Selection of Plastic mulch for vegetable Cultivation ( • Selection of Plastic mulch for vegetable C... ) Disclaimer All rights belong to their respective owners. If any owner of the content used in this presentation is unhappy, please do not report us, take your time to contact us. We will provide you proper credits or remove the video if you demand. This video is purely for the educational purpose