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Fao Irrigation And Drainage Paper No 33 Pdf

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Pasquale Steduto ; Theodore C.

Luis S. The FAO Penman method was found to frequently overestimate ET o while the other FAO recommended equations, namely the radiation, the Blaney Criddle, and the pan evaporation methods, showed variable adherence to the grass reference crop evapotranspiration. In May , FAO organized a consultation of experts and researchers in collaboration with the International Commission for Irrigation and Drainage and with the World Meteorological Organization, to review the FAO methodologies on crop water requirements and to advise on the revision and update of procedures. The panel of experts recommended the adoption of the PenmanMonteith combination method as a new standard for reference evapotranspiration and advised on procedures for calculating the various parameters.

Sensitivity analysis of FAO 33 crop water production function

This paper presents the results of sensitivity analysis of FAO 33 method and its modified forms that were developed by Rao et al. Agric Water Manage —32, Agric Water Manage —32, equation is equal for positive or negative error of K y and AET, but their sensitivities are greater for negative error of PET than positive error.

However, sensitivity of multiplicative form of Rao et al. Error percentage on estimation of Y r by multiplicative form of Rao et al. In addition, calculated Y r by multiplicative equation is higher than additive form and the difference between two forms of this equation increases severely when water shortage increases.

According to the results, it is recommended that multiplicative form of Rao et al. Agric Water Manage —32, equation instead of additive form be used in optimization models and deficit irrigation planning. This is a preview of subscription content, access via your institution.

Rent this article via DeepDyve. FAO irrigation and drainage paper no. FAO, Rome, Italy. Google Scholar. Dehghanisanij H, Nakhjavani MM, Tahiri AZ, Anyoji H Assessment of wheat and maize water productivities and production function for cropping system decisions in arid and semiarid regions.

Irrig Drain — FAO irrigation and drainage paper No. FAO, Rome, Italy, pp. Ghahraman B, Sepaskhah AR Linear and non-linear optimization models for allocation of a limited water supply. Agric Water Manage — Jensen ME Water consumption by agricultural plants. In: Kozlowski TT ed Water deficit and plant growth. Academic Press, New York, pp 1— ASCE manuals and reports on engineering practice, no. Kirda C Deficit irrigation scheduling based on plant growth stages showing water stress tolerance.

In: FAO, deficit irrigation practices. FAO water report no. FAO, Rome, Italy, pp 3— Madanoglu K Water consumption of wheat in central Anatolia. Publication No. Mannocchi F, Mecarelli P Optimization analysis of deficit irrigation systems. J Irrig Drain Eng — Montazar A, Rahimikob A Optimal water productivity of irrigation networks in arid and semi- arid regions. Irrig Drain 57 4 — Moutonnet P Yield response factors of field crops to deficit irrigation. FAO, Rome, Italy, pp 11— Prieto D, Angueira C Water stress effect on different growing stages for cotton and its influence on yield reduction.

W California contributing project report. Wardlaw R, Barnes J Optimal allocation of irrigation water supplies in real time. Download references. Correspondence to Kami Kaboosi. Reprints and Permissions. Kaboosi, K. Sensitivity analysis of FAO 33 crop water production function. Irrig Sci 30, 89— Download citation. Received : 16 June Accepted : 07 January Published : 01 February Issue Date : March Search SpringerLink Search.

Abstract This paper presents the results of sensitivity analysis of FAO 33 method and its modified forms that were developed by Rao et al.

Immediate online access to all issues from Subscription will auto renew annually. View author publications. Communicated by A. Rights and permissions Reprints and Permissions. About this article Cite this article Kaboosi, K.

PrErfg" fao coreamN:anr1. Lii:artna ashINDscl , Rome Part presents suggested methods to derive crop water requirements. More , Paper , Irrigation , Drainage , Fao irrigation and drainage paper 24 , Rome fao irrigation and drainage paper

This paper presents the results of sensitivity analysis of FAO 33 method and its modified forms that were developed by Rao et al. Agric Water Manage —32, Agric Water Manage —32, equation is equal for positive or negative error of K y and AET, but their sensitivities are greater for negative error of PET than positive error. However, sensitivity of multiplicative form of Rao et al. Error percentage on estimation of Y r by multiplicative form of Rao et al. In addition, calculated Y r by multiplicative equation is higher than additive form and the difference between two forms of this equation increases severely when water shortage increases. According to the results, it is recommended that multiplicative form of Rao et al.

Fao irrigation and drainage paper pdf This pdf version of FAO has a February errata sheet at the end of the. Materials for subsurface land drainage systems. Publications: Irrigation. Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper Determining water requirements of Russett Burbank potatoes in North. Abstract This paper presents the results of sensitivity analysis of FAO. Paper in its present form, FAO commissioned a number of papers.


The AquaCrop model was developed by the Food and Agricultural Organization (FAO) and evolves from the concepts of yield response to crop water use.


Water is essential for crop production and best use of available water must be made for efficient crop production and high yields. For application in planning, design and operation of irrigation schemes, it is possible to analyze the effect of water supply on crop yields. Water deficits in crops, and the resulting water stress on the plant, have an effect on crop evapotranspiration and crop yield.

Box , Gondar, Ethiopia. Sesame Sesamum indicum L. It is the second most important agricultural commodity for export market in the country. It is well suited as an alternative crop production system, and it has low crop water requirement with moderate resistance to soil moisture deficit.

Fao irrigation and drainage paper pdf This pdf version of FAO has a February errata sheet at the end of the.

Improving winter wheat water use efficiency in the North China Plain NCP , China is essential in light of current irrigation water shortages. In this study, the AquaCrop model was used to calibrate, and validate winter wheat crop performance under various planting dates and irrigation application rates. These results suggest that frequent irrigation with a small amount of water significantly improved BY and GY. Collectively, these results indicate that the AquaCrop model can be used in the evaluation of various winter wheat irrigation strategies. Therefore, we concluded that AquaCrop is a useful decision-making tool for use in efforts to optimize wheat winter planting dates, and irrigation strategies. This is an open-access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The authors are grateful to Mr.

Стратмор также понимал, что первым делом нужно разрядить ситуацию. Выдержав паузу, он как бы нехотя вздохнул: - Хорошо, Грег. Ты выиграл. Чего ты от меня хочешь. Молчание. Хейл сразу же растерялся, не зная, как истолковать примирительный тон коммандера, и немного ослабил хватку на горле Сьюзан. - Н-ну, - заикаясь начал он, и голос его внезапно задрожал.

Yield Response to Water Shortage

Она отличалась острым умом, хорошей интуицией, частенько засиживалась допоздна и, как говорили, знала о внутренних делах АНБ куда больше самого Господа Бога. Черт возьми, - подумал Бринкерхофф, разглядывая ее серое кашемировое платье, - или я старею, или она молодеет. - Еженедельные отчеты.  - Мидж улыбнулась, помахивая пачкой документов.  - Вам нужно проверить, как это выглядит. Бринкерхофф окинул взглядом ее фигуру.

 Проваливайте! - зарычал немец и начал закрывать дверь. Беккер не раздумывая просунул ногу в щель и открыл дверь. Но сразу же об этом пожалел. Глаза немца расширились. - Was tust du. Что вы делаете. Беккер понял, что перегнул палку.

Двадцать минут? - переспросил Беккер.  - Yel autobus. Охранник пожал плечами.

Хотя Япония переживала глубокие перемены, Нуматака оставался человеком старой закалки и жил в соответствии с кодексом менбоко - честь и репутация. Если он примет на работу калеку, его компания потеряет лицо. Он выкинул его автобиографию в мусорную корзину, даже не прочитав. Нуматака в очередной раз посмотрел на часы.

А потом они со Сьюзан будут лежать в кровати с балдахином в Стоун-Мэнор и наверстывать упущенное время. Девушка наконец нашла то, что искала, - газовый баллончик для самозащиты, экологически чистый аналог газа мейс, сделанный из острейшего кайенского перца и чили. Одним быстрым движением она выпрямилась, выпустила струю прямо в лицо Беккеру, после чего схватила сумку и побежала к двери.

 Чего вы от меня хотите, мистер. Беккер улыбнулся: - Я ищу одну девушку. Двухцветный громко рассмеялся.

Это был протяжный вопль ужаса, издаваемый умирающим зверем. Сьюзан замерла возле вентиляционного люка. Крик оборвался столь же внезапно, как и раздался.

 Больше. Панк да и. Панк да и. Беккер принадлежал к миру людей, носивших университетские свитера и консервативные стрижки, - он просто не мог представить себе образ, который нарисовала Росио. - Попробуйте припомнить что-нибудь .

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