Downloaded 156 times
Uploaded byVIVEK YADAV
agrometeorology
Vivek Yadav's presentation discusses agrometeorological instruments used for protected crop cultivation. It introduces meteorology and explains how measuring weather parameters like temperature, humidity, solar radiation, and rainfall can help farmers plan cropping patterns, reduce losses, and manage pests and diseases. The presentation describes common instruments for measuring these parameters, including sunshine recorders, quantum sensors, pyranometers, thermometers, barometers, hygrometers, and rain gauges. It provides photos and explanations of how each instrument works.
More Related Content
agrometeorology
- 1. Name –VIVEK YADAV Schoolof life sciences Sikkim University Presentation On Agro-meteorological Instruments For protected cultivation Sikkim University Department of Horticulture
- 2. Introduction • An appliedscience which deals with relationship between weather/climatic conditions and agricultural production. • Greek word “Meteoro” means ‘above the earth’s surface’ (atmosphere) “logy” means ‘indicating science’. Branch of science dealing with that of atmosphere is known as meteorology. viveksu1194@hotmail.com 2
- 3. IMPORTANCE TO CROPPRODUCTION (protected cultivation) • Helps in planning cropping patterns/systems. • Reduction in waste of capital. • Manipulation selection of sowing dates for optimum crop yields. • Reducing losses of applied chemicals and fertilizers. • Judicious irrigation to crops. • Efficient harvesting of all crops. • Reducing or eliminating outbreak of pests and diseases. • Efficient management of soils which are formed out of weather action. viveksu1194@hotmail.com 3
- 4. Parameter to beMeasured Atm. moisture Temperat ure Wind Humidity Light viveksu1194@hotmail.com 4
- 5. Solar radiation Sunshine recorder Luxmeter Quantum sensor Tube solarimeter Angstrom Phyrheliometer Pyranometer Net radiometter viveksu1194@hotmail.com 5
- 6. Sunshine Recorder • Convexglass sphere mounted on a brass bowl with three sets of grooves for holding the sunshine recorder cards. • Convex glass sphere burns a trace on the cords when exposed to sun. • The length on burning trace is the measure of the duration of bright sunshine. • Three types of cards : • long curved for summer • short for winter • straight card for equinoxes
- 7.
- 8. Quantum sensor and Tubesolarimeter • Quantum Sensor: measures intensity of PAR (400-700nm) wavelength range. • It gives an output quantum flux rather than energy flux as quantum response is more appropriate to photosynthesis studies . • Measuring in MOLES. • Tube Solarimeter: intensity of solar radiation. • Used in not uniform condition. • Unit : W/mm viveksu1194@hotmail.com 8
- 9. Quantum sensor Readingdevice viveksu1194@hotmail.com 9
- 10. Pyranometer /Albedometer • Measuresglobal solar radiation both direct and diffuse radiation. • It can be used as Albedometer if it is exposed to earthen surface . viveksu1194@hotmail.com 10
- 11. Temperature Simple Stevenson screen Maximumthermometer/ Minimum Thermometer Dry/ Wet bulb thermometer Infrared thermometer Assmann psycrometer/ psychrometer Psychrometer Six’s Max-Min thermometer viveksu1194@hotmail.com 11
- 12. Single Stevenson Screen •Wooden box designed for housing 4 thermometer which record the surface air temperature. • White painted • Open for air passage. viveksu1194@hotmail.com 12
- 13. Dry and Wetbulb • Dry: consists of a bulb at one end and is connected with a tube in which the mercury is filled. • Wet : bulb of thermometer is wrapped with a muslin cloth using cotton thread . • Other end of the string of the cotton thread is dipped in a small and narrow mouth glass bottle having DD water. • Used for hygrometric table for RH. viveksu1194@hotmail.com 13
- 14. Dry and wetthermometerviveksu1194@hotmail.com 14
- 15. Wind distribution Aneroid Barometer Kewbarometer Barograph Wind Vane Anemometer viveksu1194@hotmail.com 15
- 16. Aneroid barometer • Consistsof thin shallow circular metal box from which all air has been removed . • Packed top and bottom to make pressure sanative. viveksu1194@hotmail.com 16
- 17.
- 18.
- 19. Atmospheric moisture Station hygrometer Hygrometer/hygrograph Leaf wetness recorder/ counter Open-Pan evaprometer Duvdevani Dewguage viveksu1194@hotmail.com 19
- 20. Hygrometer • Any instrumentfor measuring the water-vapor content of the atmosphere. • Classical • Metal paper • Hair tension • Siling • Chilled (dew point ) • Modern • Capitative • Theraml • Gravimeteric • Resisitive Instruments usually work on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. viveksu1194@hotmail.com 20
- 21. Digital hygrometerHair HygrometerDry and wet Bulbviveksu1194@hotmail.com 21
- 22. Rainfall Ordinary rainguage Self recordingrainguage Automatic weather station viveksu1194@hotmail.com 22
- 23. Rainguage • A raingauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period of time. • Different names: • Udometer • Pluviometer • Ombrometer Standard Pluviometer of intensities Weighing precipitation gauge Optical rain gauge TYPES viveksu1194@hotmail.com 23
- 24.
- 25. Rain gauge isan meteorological instrument for determining the depth of precipitation (usually in mm) that occurs over a unit area (usually one meter squared) and thus measuring rainfall amount. One millimeter of measured precipitation is the equivalent of one liter of rainfall per meter squared. viveksu1194@hotmail.com 25
- 26.