tailieunhanh - Greenhouses and Post Harvest Technology

After the advent of green revolution, more emphasis is laid on the quality of the product along with the quantity of production to meet the ever- growing food requirements. Both these demands can be met when the environment for the plant growth is suitably controlled. The need to protect the crops against unfavourable environmental conditions led to the development of protected agriculture. Greenhouse is the most practical method of achieving the objectives of protected agriculture, where the natural environment is modified by using sound engineering principles to achieve optimum plant growth and yields | AENG252 2 1 1 Greenhouses and Post Harvest Technology . Topic Page 1 Introduction to green houses - history definition greenhouse effect advantages of green houses. 1 -3 2 Brief description of types of green houses - greenhouses based on shape utility construction covering materials and cost shade nets. 4 -9 3 Plant response to greenhouse environments - light temperature relative humidity ventilation and carbon dioxide and environmental requirement of agriculture and horticulture crops inside green houses. 10 -12 4 Equipment required for controlling green house environment -summer cooling and winter cooling natural ventilation forced ventilation and computers. 13 -20 5 Planning of green house facility - site selection and orientation structural design and covering materials. 21 -23 6 Materials for construction of green houses - wood galvanized iron glass polyethylene film poly vinyl chloride film Tefzel T2 film fiberglass reinforced plastic rigid panel and acrylic and polycarbonate rigid panel. 24 - 27 7 Design criteria and constructional details of greenhouses -construction of pipe framed greenhouses material requirement preparation of materials and procedure of erection. 28 - 31 8 Greenhouse heating and distribution systems. Greenhouse utilization - off-season drying of agricultural produce. Economic analysis of greenhouse production - capital requirement economics of production and conditions influencing returns. 32 - 39 9 Irrigation system used in greenhouses-rules of watering hand watering perimeter watering overhead sprinklers boom watering and drip irrigation. 40 - 43 10 Threshing - types of threshers parts threshers for different crops terminology different types of cylinders used in threshers care and maintenance. 44 - 47 11 Terminology related to threshers components working care and maintenance 48 - 55 12 Winnowing - manual and power operated winnowers care and maintenance. 56 - 58 13 Groundnut decorticators - hand and power operated .