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CROP COEFFICIENT [6 records]
Record 1 - internal organization data 2022-03-04
Record 1, English
Record 1, Subject field(s)
- Drainage and Irrigation (Agric.)
Record 1, Main entry term, English
- crop evapotranspiration
1, record 1, English, crop%20evapotranspiration
correct
Record 1, Abbreviations, English
- ETc 1, record 1, English, ETc
correct, see observation
Record 1, Synonyms, English
- crop water use 2, record 1, English, crop%20water%20use
correct
- ETc 1, record 1, English, ETc
correct, see observation
- ETc 1, record 1, English, ETc
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
A crop coefficient must be applied to the [reference evapotranspiration] value to determine the crop evapotranspiration(ETc) which is also referred to as "crop water use. "The crop coefficient depends on the crop type and on the crop's stage of development. 1, record 1, English, - crop%20evapotranspiration
Record number: 1, Textual support number: 1 OBS
ETc: written ETc 3, record 1, English, - crop%20evapotranspiration
Record 1, French
Record 1, Domaine(s)
- Drainage et irrigation (Agriculture)
Record 1, Main entry term, French
- évapotranspiration d'une culture
1, record 1, French, %C3%A9vapotranspiration%20d%27une%20culture
correct, feminine noun
Record 1, Abbreviations, French
- Etc 1, record 1, French, Etc
correct, see observation, feminine noun
Record 1, Synonyms, French
- consommation d'eau des cultures 2, record 1, French, consommation%20d%27eau%20des%20cultures
feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
L'évapotranspiration d'une culture (ETc) peut se calculer [...] si on dispose de données suffisantes pour le calcul des paramètres de culture [...] Cependant, dans la pratique de l'irrigation, on multiplie généralement [l'évapotranspiration potentielle d'une culture de référence] par un coefficient cultural, Kc, lequel varie un peu avec le climat, mais essentiellement avec les caractéristiques propres de la culture. 1, record 1, French, - %C3%A9vapotranspiration%20d%27une%20culture
Record number: 1, Textual support number: 1 OBS
ETc : s'écrit ETc 3, record 1, French, - %C3%A9vapotranspiration%20d%27une%20culture
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Drenaje y riego (Agricultura)
Record 1, Main entry term, Spanish
- consumo de agua en los cultivos
1, record 1, Spanish, consumo%20de%20agua%20en%20los%20cultivos
masculine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2022-03-04
Record 2, English
Record 2, Subject field(s)
- Drainage and Irrigation (Agric.)
Record 2, Main entry term, English
- crop coefficient
1, record 2, English, crop%20coefficient
correct
Record 2, Abbreviations, English
- Kc 1, record 2, English, Kc
correct, see observation
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
A crop coefficient must be applied to the [reference evapotranspiration] value to determine the crop evapotranspiration(ETc) which is also referred to as "crop water use. "The crop coefficient depends on the crop type and on the crop's stage of development. 1, record 2, English, - crop%20coefficient
Record number: 2, Textual support number: 1 OBS
Kc: written Kc 2, record 2, English, - crop%20coefficient
Record 2, French
Record 2, Domaine(s)
- Drainage et irrigation (Agriculture)
Record 2, Main entry term, French
- coefficient cultural
1, record 2, French, coefficient%20cultural
correct, masculine noun
Record 2, Abbreviations, French
- Kc 1, record 2, French, Kc
correct, see observation, masculine noun
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
L'évapotranspiration d'une culture (ETc) peut se calculer [...] si on dispose de données suffisantes pour le calcul des paramètres de culture [...] Cependant, dans la pratique de l'irrigation, on multiplie généralement [l'évapotranspiration potentielle d'une culture de référence] par un coefficient cultural, Kc, lequel varie un peu avec le climat, mais essentiellement avec les caractéristiques propres de la culture. 1, record 2, French, - coefficient%20cultural
Record number: 2, Textual support number: 1 OBS
Kc : s'écrit Kc 2, record 2, French, - coefficient%20cultural
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2010-04-30
Record 3, English
Record 3, Subject field(s)
- Measuring Instruments
- Weather Stations and Meteorological Instruments and Equipment
- Soils (Agriculture)
Record 3, Main entry term, English
- sunken Colorado pan
1, record 3, English, sunken%20Colorado%20pan
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
Many different types of evaporation pans are being used. The best known pans are the Class A evaporation pan(circular pan) and the Sunken Colorado pan(square pan). The principle of the evaporation pan is the following : the pan is installed in the field; the pan is filled with a known quantity of water(the surface area of the pan is known and the water depth is measured) ;the water is allowed to evaporate during a certain period of time(usually 24 hours). For example, each morning at 7 o’clock a measurement is taken. The rainfall, if any, is measured simultaneously-after 24 hours, the remaining quantity of water(i. e. water depth) is measured;-the amount of evaporation per time unit(the difference between the two measured water depths) is calculated; this is the pan evaporation : E pan(in mm/24 hours) ;-the E pan is multiplied by a pan coefficient, K pan, to obtain the Eto [reference crop evapotranspiration]. 1, record 3, English, - sunken%20Colorado%20pan
Record 3, Key term(s)
- sunken Colorado evaporation pan
- Colorado pan
- square pan
- Colorado evaporation pan
Record 3, French
Record 3, Domaine(s)
- Appareils de mesure
- Stations, instruments et équipements météorologiques
- Sols (Agriculture)
Record 3, Main entry term, French
- bac d'évaporation enterré de type Colorado
1, record 3, French, bac%20d%27%C3%A9vaporation%20enterr%C3%A9%20de%20type%20Colorado
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- bac Colorado 2, record 3, French, bac%20Colorado
correct, masculine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
La difficulté d'accéder à la mesure directe de l'évaporation d'une surface d'eau a conduit à l'utilisation d'appareils constitués d'un bac, d'un bassin ou d'une cuve de profondeur variable et d'assez grande surface, dans lesquels on mesure l'abaissement du niveau de l'eau sous l'action de l'évaporation. On peut citer : 1) Les bacs d'évaporation sur charpente dont le type est celui dit «de classe A» [...] 2) Les bacs d'évaporation enterrés dont le type est celui dit «Colorado», mis au point par la Station Expérimentale d'Agriculture du Colorado : il mesure trois pieds (91,4 cm) de côté et a une profondeur de 18 pouces (45,7 cm); l'eau est maintenue à 4 pouces (10,2 cm) du rebord, au niveau du sol. Il existe une version «métrique» de ce bac ayant un mètre carré de superficie et 50 centimètres de profondeur; il est enterré, son bord supérieur restant à dix centimètres au-dessus du sol et l'eau est maintenue à peu près au même niveau que le sol. 3) Le bac BPI (Bureau of Plant Industry/U.S.D.A.) [...] 4) Les bacs flottants dont le type est celui de l'Institut de Géologie des États-Unis. 1, record 3, French, - bac%20d%27%C3%A9vaporation%20enterr%C3%A9%20de%20type%20Colorado
Record number: 3, Textual support number: 2 CONT
Les bacs enterrés : à cause de leur enterrement, ils sont moins sensibles que les premiers aux influences des rayonnements solaires sur les parois, par contre, leur inconvénient serait les gouttes de pluie qui rebondissent sur le sol en recueillant divers détritus. Le bord du bac ne dépasse en effet le niveau du sol que de 10 cm environ. Le bac enterré le plus connu est le bac «Colorado». Il se présente sous la forme d'un carré de 91,4 cm de côté et de 46,2 cm de profondeur. Le plan d'eau dans le bac est maintenu à peu près au niveau du sol. 3, record 3, French, - bac%20d%27%C3%A9vaporation%20enterr%C3%A9%20de%20type%20Colorado
Record 3, Key term(s)
- bac d'évaporation Colorado
- bac d'évaporation enterré Colorado
- bac carré
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2010-04-30
Record 4, English
Record 4, Subject field(s)
- Measuring Instruments
- Weather Stations and Meteorological Instruments and Equipment
- Soils (Agriculture)
Record 4, Main entry term, English
- class A evaporation pan
1, record 4, English, class%20A%20evaporation%20pan
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Many different types of evaporation pans are being used. The best known pans are the Class A evaporation pan(circular pan) and the Sunken Colorado pan(square pan). The principle of the evaporation pan is the following : the pan is installed in the field; the pan is filled with a known quantity of water(the surface area of the pan is known and the water depth is measured) ;the water is allowed to evaporate during a certain period of time(usually 24 hours). For example, each morning at 7 o’clock a measurement is taken. The rainfall, if any, is measured simultaneously-after 24 hours, the remaining quantity of water(i. e. water depth) is measured;-the amount of evaporation per time unit(the difference between the two measured water depths) is calculated; this is the pan evaporation : E pan(in mm/24 hours) ;-the E pan is multiplied by a pan coefficient, K pan, to obtain the Eto [reference crop evapotranspiration]. 2, record 4, English, - class%20A%20evaporation%20pan
Record 4, Key term(s)
- class-A evaporation pan
- class "A" evaporation pan
- US class-A evaporation pan
- US class A evaporation pan
- USWB class A evaporation pan
- USWB class-A evaporation pan
- U.S. Weather Bureau class A evaporation pan
- U.S. Weather Bureau class-A evaporation pan
Record 4, French
Record 4, Domaine(s)
- Appareils de mesure
- Stations, instruments et équipements météorologiques
- Sols (Agriculture)
Record 4, Main entry term, French
- bac d'évaporation de classe A
1, record 4, French, bac%20d%27%C3%A9vaporation%20de%20classe%20A
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- bac d'évaporation sur charpente 1, record 4, French, bac%20d%27%C3%A9vaporation%20sur%20charpente
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
La difficulté d'accéder à la mesure directe de l'évaporation d'une surface d'eau a conduit à l'utilisation d'appareils constitués d'un bac, d'un bassin ou d'une cuve de profondeur variable et d'assez grande surface, dans lesquels on mesure l'abaissement du niveau de l'eau sous l'action de l'évaporation. On peut citer : 1) Les bacs d'évaporation sur charpente dont le type est celui dit «de classe A», utilisé de façon systématique aux États-Unis par l'U.S., Weather Bureau : il a été adopté par l'OMM et l'AIHS. Il mesure quatre pieds (121,9 cm) de diamètre et a une profondeur de dix pouces (25,4 cm); l'eau est maintenue à deux ou trois pouces du rebord (5,1 cm ou 7,6 cm). Ce récipient cylindrique est réalisé en fer galvanisé. 2) Les bacs d'évaporation enterrés dont le type est celui dit «Colorado» [...] 3) Le bac BPI (Bureau of Plant Industry/U.S.D.A.) [...] 4) Les bacs flottants dont le type est celui de l'Institut de Géologie des États-Unis. 1, record 4, French, - bac%20d%27%C3%A9vaporation%20de%20classe%20A
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2001-08-02
Record 5, English
Record 5, Subject field(s)
- Cultural Practices (Agriculture)
- Drainage and Irrigation (Agric.)
- Plant Biology
Record 5, Main entry term, English
- maximum evapotranspiration
1, record 5, English, maximum%20evapotranspiration
correct
Record 5, Abbreviations, English
- ETm 1, record 5, English, ETm
correct
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Maximum evapotranspiration(ETm) was estimated by the water balance method and reference evapotranspiration(ETo) by the following methods : Penman, class A pan, solar radiation and Thornthwaite. The crop coefficient values varied with the method used to estimate the reference evapotranspiration, although they have presented the same trends regardless the method involved. 1, record 5, English, - maximum%20evapotranspiration
Record 5, French
Record 5, Domaine(s)
- Soin des cultures (Agriculture)
- Drainage et irrigation (Agriculture)
- Biologie végétale
Record 5, Main entry term, French
- évapotranspiration maximale
1, record 5, French, %C3%A9vapotranspiration%20maximale
correct, feminine noun
Record 5, Abbreviations, French
- ETm 1, record 5, French, ETm
correct
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
L'évapotranspiration maximale ETm d'une culture est la valeur de l'évapotranspiration, en l'absence d'advection, quand les conditions d'alimentation hydrique sont optimales, c'est-à-dire quand l'humidité du sol est proche de la capacité au champ dans la zone racinaire; dans ces conditions la résistance stomatique est minimale et la résistance de l'espace poreux végétal rp intervient; cette dernière dépend de l'espèce végétale et de son stade végétatif. L'évapotranspiration ETm peut être reliée à l'évaporation potentielle EP par des coefficients culturaux empiriques inférieurs à l'unité. 1, record 5, French, - %C3%A9vapotranspiration%20maximale
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 1977-02-17
Record 6, English
Record 6, Subject field(s)
- Hydrology and Hydrography
- Geology
Record 6, Main entry term, English
- Blaney-Criddle method
1, record 6, English, Blaney%2DCriddle%20method
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 OBS
Blaney-and Criddle(1950) developed a simplified formula for estimating consumptive use in the arid western regions of the United States. In this method,(...) monthly consumptive use, cu, is found by multiplying together the mean monthly temperature, Tm, the monthly per cent of annual daytime hours, p, and a monthly crop coefficient k. Expressed mathematically cu=k Tm P/100=kf. 1, record 6, English, - Blaney%2DCriddle%20method
Record 6, French
Record 6, Domaine(s)
- Hydrologie et hydrographie
- Géologie
Record 6, Main entry term, French
- méthode de Blaney-Criddle 1, record 6, French, m%C3%A9thode%20de%20Blaney%2DCriddle
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 OBS
Blaney et Criddle (1950) ont développé une formule simplifiée pour calculer l'évapotranspiration dans les régions arides de l'ouest des États-Unis. Dans cette méthode, (...) l'évapotranspiration mensuelle, cu, est obtenue en multipliant ensemble la température mensuelle moyenne, Tm, le pourcentage mensuel d'heures de jours par année, p, et un coefficient mensuel de culture, k. La relation est exprimée mathématiquement cu = k Tm P/100 = kf. 1, record 6, French, - m%C3%A9thode%20de%20Blaney%2DCriddle
Record 6, Spanish
Record 6, Textual support, Spanish
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