The Pruitt and Doorenbos version of the Penman equation developed from Doorenbos J, Pruitt WO () Guidelines for predicting crop water requirements. Doorenbos & Pruitt () introduziram a terminologia “Evapotranspiração de Referência”, ETr, para denominar a perda de água por uma cultura específica. method of Department Irrigation and Drainage, Doorenbos and Pruitt and Doorenbos and Pruitt ();day/night wind ratio = 3, PM=Penman-Monteith ( Smith.

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Can I borrow this item? The following data were collected: Catalogue Persistent Identifier https: Scientia Agricola, 19777, v. From 25 December to 1 Januarythe Library’s Reading Rooms will be closed and no collection requests will be filled. Operational estimates of reference evapotranspiration. According to Villa Nova et al.

Class A pan coefficients Foorenbos to estimate daily reference evapotranspiration ETo. New search User lists Site feedback Ask a librarian Help. Collection delivery service resumes on Wednesday 2 January Guidelines for predicting crop water requirements. However, the R 2 values, which indicate the precision of the estimates, varied between 0.

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The original Brunt model and FAO model for pruittt climates performed more poorly than did the other models in estimating the Rn and ET0. The Rnestimated obtained with the fifth model has a relatively high error.


Advanced search Search history. Then, Snyder presented another equation to predict Kp using the same variables in a multiple linear regression. Services on Demand Journal.

Class A pan coefficients (Kp) to estimate daily reference evapotranspiration (ETo)

You can view this on the NLA website. A Note on a Recent Paper by J. There are several methods to determine Kp values, using wind speed, relative humidity and fetch length and conditions. Reference evapotranspiration ETo was measured with an automatic weighing lysimeter 0. The fifth was a linear regression model based on Rs.

According to Pereira et al. Scientific Research An Academic Publisher.

BookOnline – Google Books. Robust quantitative techniques for validating pesticide transport models. How to cite this article. The atmospheric pressure was determined by aneroid barograph, and sunshine duration was odorenbos with a Campbell-Stokes recorder.

In addition to the sensor readings Rnmeasuredfive different models were used in order to obtain the Rnestimated. The estimated values of Kp and the observed Kp, obtained from the relationship between ETo measured in a weighing lysimeter and ECA measured in a class A pan, were compared by regression analysis. In the Library Request this item to view in the Library’s reading rooms using your library card. The class A doorenboz coefficient Kp has been used to convert pan evaporation ECA to grass-reference evapotranspiration EToan important component in water management of irrigated crops.


In order dkorenbos solve this problem, Cuenca suggested a polynomial equation to predict Kp values from U, Doornebos, and F. Field crops — Water requirements. The use of an arbitrary and constant Kp 0. Equation for evaporation pan to evapotranspiration conversion. With these methods, the relationship between measured and estimated ETo showed high accuracy and good precision: Members of Aboriginal, Torres Strait Islander and Maori communities are advised that this catalogue contains names and images of deceased people.

Converting from pan evaporation to evapotranspiration.