Crop evapotranspiration

Research "Effect of fertilizer and mulching materials on growth and yield of sesame variety VD11 in Nghe An province" on the application of drought tolerant varieties and the use of suitable mulching materials is an important measure that contributes to limiting evapotranspiration and high temperatures in cultivated soils, ensuring of sesame crops can be growth and develop in the condition of climate change in Nghe An.

5p tieuduongchi 24-10-2022 7 3   Download

This work aimed to study the effect of three green-house covers (polyethylene sheet, white and black net) and three irrigation levels [80%, 100% and 120% of the potential evapotranspiration estimated according to class A pan equation (ETo)], applied by drip irrigation system, on plant growth and crop yield of Cucumber (Cucumis sativus L. cv. Reda F1).

7p schindler 30-12-2021 8 0   Download

Estimation of crop water requirement is essential for agricultural planning and irrigation scheduling. The aim of this study was to compute the water requirement of wheat and rice crops for all districts of Haryana. Climatic data on maximum and minimum temperature, rainfall, relative humidity, wind speed and solar radiation were used to estimate the reference evapotranspiration (ETo) at different gridded locations by using Penman Monteith method in MATLAB software.

7p cothumenhmong11 11-05-2021 7 2   Download

The aim of this study was to estimate solar radiation and reference crop evapotranspiration by using of limited weather parameters. This paper also describes the modification of the original equation with maximum and minimum temperatures for solar radiation. Thus, modifications involved for the corrections associated with climatological parameters and also to determine the accuracy and applicability of a number of existing and newly developed formulae for calculating solar radiation from other weather variables.

3p trinhthamhodang1218 26-02-2021 11 1   Download

The research shows that the irrigation management model can effectively and efficiently estimate the crop water requirements. The model, that calculates evapotranspiration and crop water requirements, allows the development of recommendations for improved irrigation practices, the planning of irrigation schedules under varying water supply conditions and yields reduction under various conditions.

9p cothumenhmong9 18-01-2021 15 1   Download

The objective of this study is to discuss the effects of dates of sowing and irrigation on ET of wheat varieties and determine the relationship between ET and wheat grain yield for Eastern India through crop water production functions.

14p cothumenhmong9 04-01-2021 12 2   Download

Although, protective cultivation (in soil or soilless media) offers a favorable environment for crop growth, development and consequently, results in higher productivity. However, numerous factors viz. temperature, relative humidity, radiation, evapotranspiration (crop water requirement) vapour pressure deficit, plant stomatal conductance, irrigation, fertigation, disease incidence, leaf wetness duration, electricity cost, diesel fuel cost and labor cost affect the greenhouse cucumber production to a significant degree.

20p gaocaolon9 22-12-2020 24 2   Download

In this study an attempt has been made to calculate reference crop evapotranspiration (ETo) by different methods using DSS_ET model and compared with that of FAO 56- Penman Monteith method (Smith et al., 1991, Rohitashw et al., 2011) under humid conditions of Pusa.

11p gaocaolon9 22-12-2020 11 1   Download

For accurate computation of crop water requirement, precise and globally acceptable method of estimating tall crop reference evapotranspiration i.e. Penman-Monteith was recommended by many authors. The method predicts tall crop reference evapotranspiration based on different climatic parameters. In present study, Penman-Monteith reference evapotranspiration at Udaipur station for period of 1991-2010 was calculated for tall crop reference surface.

8p nguaconbaynhay8 13-10-2020 15 2   Download

A field experiment was conducted to investigate the effect of irrigation levels using drip irrigation system for Lettuce crop grown under polyhouse and in open field condition during winter season (November-February) for two consecutive years (2014-15 and 2015- 16) at the Experimental Farm area of Precision Farming Development Centre Project, Indian Institute of Technology, Kharagpur, India. Reference evapotranspiration was estimated using FAO-56 Penman Monteith approach.

11p chauchaungayxua8 03-10-2020 13 1   Download

The present study aimed to determine irrigation depth and interval based on soil water potential fluctuation monitoring for Brinjal. Field experiment was conducted at Agricultural Engineering College and Research Institute, Kumulur, Tamil Nadu during the two crop growing seasons from 13 November 2018 to 22 March 2019 and 13 April 2019 to 20 August 2019. Brinjal F1 hybrid Dhruva was transplanted at the row spacing of 90 cm and plant spacing was 45 cm.

11p trinhthamhodang1215 23-09-2020 18 2   Download

The objectives to estimate reference evapotranspiration using the FAO-56 Penman-Monteith equation, to estimate the actual evapotranspiration using satellite-based MODIS data, and to estimate actual evapotranspiration using crop coefficients and reference evapotranspiration for maize crop in the panam command area.

11p caygaocaolon7 18-09-2020 11 1   Download

Rice is the world's most consumed cereal grain, making up the dietary staple food of more than 60 percent of the world's population. For agriculture dominated country like India, the assessment of rice yield is of utmost importance for policy makers in managing the food security and water resources.

7p caygaocaolon6 30-07-2020 15 2   Download

The crop water requirement (CWR) and irrigation requirement (IR) of rice crops were calculated using a web based software. Relevant crop coefficients (Kc), duration of crops and cropping pattern were used to calculate CWR from ETo. These coefficients present the relationship between references (ETo) and crop evapotranspiration (ET crop) or ET crop = Kc * ETo. The covered area of all crops (canopy cover) was collected.

9p caygaocaolon6 30-07-2020 7 1   Download

To control the overexploitation of accessible water resources, it has become essential to define proper strategies for planning, development, and management of water resources. Proper modification in traditional irrigation practices helps improve water use efficiency. CROPWAT is an FAO suggested model for proper management of irrigation.

13p caygaocaolon6 30-07-2020 15 2   Download

Designing, establishing and managing irrigation projects, and scheduling irrigation requires estimating a crop seasonal water requirement. Lysimeter experiment conducted on green gram during Kharif season. His experiment was aimed at determining the seasonal crop evapotranspiration (ETc) and crop coefficient (Kc) of green gram crop for different development stages.

10p kethamoi5 03-06-2020 13 0   Download

The available water decreases as world demand for water increases for various purposes such as industrial, agriculture hydropower. To improve the water use efficiency, there is a need to modify traditional irrigation scheduling. In the present study, the CROPWAT model was used to estimation the irrigation scudding for rice and cotton crop to improve water use efficiency. From the analysis, it was found that reference evapotranspiration was almost directly proportional to the radiation and sunshine hours and inversely proportional to the relative humidity.

8p caygaocaolon5 27-05-2020 22 1   Download

Progressive increase in urban area, more particularly with construction of buildings is reducing the availability of land for agriculture. The demand for food is also rapidly increasing with increase in population. Hence, it is difficult to feed the growing population with limiting land resources. In that context, there is ample scope for rooftop cultivation to solve the problem of land shortage for agricultural production. Proper irrigation scheduling for crops grown on rooftops is yet to be established. Irrigation scheduling is only possible by knowing the actual crop evapotranspiration.

8p caygaocaolon5 27-05-2020 10 0   Download

The study was conducted in Shipra river basin to determine actual evapotranspiration in the area. Long term daily meteorological data including rainfall, maximum temperature, minimum temperature, relative humidity, wind speed and sunshine hours of Indore IMD station was used as input data in CROPWAT Model 8.0. The potential evapotranspiration was converted into actual evapotranspiration by using the crop coefficient. Reference evapotranspiration is a measure of evaporative demand, while the crop coefficient accounts for crop characteristics and management practices (e.g.

12p angicungduoc4 26-04-2020 13 0   Download

During the 21st century adoption of electric motor for irrigation operation will be much more resulting a sharp rise in demand for electricity. The electricity requirement for planning, design and operation of irrigation and water resources systems is necessary. It is a parameter of prime importance in formulating the policy for distribution of electricity as well as decision making in day by day operation and management of electricity distribution network. The study was done for the year 2010-11.

7p quenchua4 16-04-2020 11 1   Download