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THRESHOLD VALUEDevelopment of for Crop ManagementMark Anthony DL. Dela Cruz

THRESHOLDThe point that must be exceeded to begin producing a given effect or result or to elicit a response

Example:42mm of rainfall in one day will cause 2 feet of flood in Mr. Notas farm

4 consecutive days of 70-80% RH will promote occurrence of BLB for a certain variety

50kph of wind will cause IR64 in Ms. Ditarros farm to lodge

7 consecutive days of soil moisture below 10% will cause significant yield reduction for rice in reproductive stage -is the science that applies knowledge in weather and climate to qualitative and quantitative improvement in agricultural production. -it requires a diverse, multidisciplinary array of data for operational applications and research.AGRICULTURALMETEOROLOGY

4These data needs to be supplemented with more specific datarelated to the biosphere, the environment of all living organisms, and biological data related to the growth and development of these organisms.

AGRICULTURALMETEOROLOGY5Agrometeorological information includes also the technological factors that affect agriculture, such as irrigation, plant protection, fumigation and dust spraying.

AGRICULTURAL METEOROLOGY70-80% RH for 7 days will favor Rice Blast IF the variety is susceptibleExample:A farm with 0.00 mm rainfall in 5 days will experience yield reduction IF irrigation is not availableEach farm is a unique entity with combinations of climate, soils, crops, livestock and equipment to manage and operate within the farming system

REMEMBER:

Efficient weather and climate data utilization:

1. Information concerned with the agricultural practices employed.

conserves natural resources

promotes economic benefit to the farmer.

1. Agricultural practices

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12. Data related to organism response to varying environments. a. variety,

b. stages of their growth and

c. development of pathogenic elements

1. Agricultural practices2. Organism response

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22213. Data related to the state of the soil environment.

soil moisture

b. water availability as affected by: effectiveness of precipitation or irrigation, and by the soils physical properties and depth.

3. Data related to the state of the soil environment.

c. The rate of water loss from the soil:depends on the climate, the soils physical properties, and the root system of the plant community.

d. Erosion by wind and water depends on weather factors and vegetative cover;

1. Agricultural practices2. Organism response3. Soil environment

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22213 4. Data related to the state of the atmospheric environment.

Include observations of rainfall, sunshine, solar radiation, air temperature, humidity, and wind speed and direction;

1. Agricultural practices2. Organism response3. Soil environment4. Atmospheric environment

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222143 5. Information related to weather disasters and their influence on agriculture;

1. Agricultural practices2. Organism response3. Soil environment4. Atmospheric environment5. Weather disasters

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1. Agricultural practices2. Organism response3. Soil environment4. Atmospheric environment5. Weather disasters

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222143Analysis of the effects of weatherThe climatic elements do not act independently on the biological life cycle of living things: an analytical study of their individual effects is often illusory.

Handling them all simultaneously, however, requires considerable data and complex statistical treatment.Send accomplished AESA forms to [email protected]

PUBLICATION OF RESULTSTables

GraphsPUBLICATION OF RESULTSMAPS

AGROMETEOROLOGICAL BULLETINAccording to FAO classification, some agro-meteorological indicators can be applied for tropical areas in Asia as following:IndicatorsVery suitableSuitableQuite suitableLower SuitableUnsuitabilityLowest Temperature in seedlings stage (deg C)22-1818-1414-1010-730Temperature in growths stage (deg C)32-3030-2424-1818-10