scholarly journals More Irrigated Crop Production with Less Water Use

2019 ◽  
pp. 218-226
Author(s):  
Ahmed Ibrahim Ekhmaj ◽  
Younes Daw Ezlit ◽  
Mukhtar Mahmud Elaalem
Keyword(s):  
Crop Yield ◽  
Irrigation Water ◽  
Performance Indicators ◽  
Unit Volume ◽  
Unit Area ◽  
Irrigation Management ◽  
Agricultural Practices ◽  
Common Practices ◽  
The Common ◽  
Production Output

Three major performance indicators developed by the International Water Management Institute (IWMI, 1998) are used in this paper to evaluate the performance of the irrigated crops in the region according to the commonly followed practices among farmers as compared with their performance under conditions of much improved irrigation management and agricultural practices. These indicators include the Standardized Gross Value Production (SGVP), the unit area production output (crop yield or its financial value per hectare) and the unit volume of irrigation water production output (crop yield or its financial value per cubic meter). The comparison between the two agricultural practices indicated that the unit area output of the common practices among farmers did not exceed 6483 Libyan Dinars / hectare, while that under the improved practices was 11605 Libyan Dinars / hectare. The unit volume of irrigation water output for the common practices was 0.63 Libyan Dinar / cubic meter, while that under the improved practices reached 1.63 Libyan Dinar / cubic meter. These results clearly show the importance of the applied performance indicators in the assessment and clarification of the economic impacts of any introduced interventions aiming at the improvement of and/or the differentiation among irrigation management practices and alternative agricultural cropping systems.

A handy irrigation management method through meteorological data. Case study in N. Greece

2014 ◽  
Vol 16 (2) ◽  
pp. 219-228
Keyword(s):  
Irrigation Water ◽  
Land Reclamation ◽  
Meteorological Data ◽  
Irrigation Management ◽  
Daily Evapotranspiration ◽  
The Common ◽  
Management Method ◽  
The Times ◽  
First Time

<div> <p>Crop irrigation, especially in irrigation networks, often consumes larger quantities of irrigation water than necessary since most of the times irrigation is carried out empirically and not based on actual crop requirements. The aim of this work is the management of irrigation water though the use of meteorological data. This approach was utilized for the first time in Greece and applied in a pilot area of about 6,000 ha at the Local Organization of Land Reclamation in Nigrita. The method is based on accurate calculation of daily evapotranspiration of the common cultivations at the area (maize, cotton, alfalfa), using meteorological data. Thus irrigation is organized based on actual water consumption of the crops ensuring the qualitative and quantitative characteristics of their products.</p> </div> <p>&nbsp;</p>

scholarly journals Application of DSSAT CERES-Maize to Identify the Optimum Irrigation Management and Sowing Dates on Improving Maize Yield in Northern China

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 674
Author(s):  
Patrick Rugira ◽  
Juanjuan Ma ◽  
Lijian Zheng ◽  
Chaobao Wu ◽  
Enke Liu
Keyword(s):  
Water Use ◽  
Crop Yield ◽  
Irrigation Water ◽  
Aboveground Biomass ◽  
Irrigation Management ◽  
Irrigation Treatment ◽  
Simulated Data ◽  
Northern China ◽  
Area Index ◽  
Sowing Dates

The increase in irrigated maize plantings in Northern China has increased the demand for irrigation water in the region, resulting in chronic water shortages in drier years. Efficient irrigation and water use are essential for the sustainable development and management of water resources in the area. This research applied DSSAT-maize in the Loess Plateau (Fenhe basin) to determine the suitable irrigation management and optimum sowing dates to ensure the stability of spring maize production. The model was calibrated using the full irrigation treatment of 2017–2019 growing seasons. Crop data, such as plant phenological phases, aboveground biomass, crop yield, and leaf area index, were used for model calibration. The calibration showed great consistency between the measured and simulated data, with nRMSE (normalized root mean square error) ranging from 0.77% to 21.6%. The field values of crop yield, aboveground biomass, LAI, soil water content, and water use efficiency were used to evaluate the calibrated model’s performance, the model evaluation was found to be satisfactory with acceptable nRMSE ranging from 1.9% to 25.3%. Optimum simulated sowing dates for increased productivity and water efficiency were between 15 and 25 May. The optimum irrigation timing and volume of irrigation water application were 85 mm at the tasseling phase and 85 mm at the grouting phase respectively. Therefore, the yield of maize can be increased by applying irrigation and altering the sowing date in case rainfall is insufficient to satisfy the water demand of the crops in the Fenhe basin.

KOMIK DI LINGKARAN INDUSTRI MUSIK

DeKaVe ◽  
2013 ◽  
Vol 1 (2) ◽  
Author(s):  
Terra Bajraghosa
Keyword(s):  
Comic Books ◽  
Music Industry ◽  
Comic Book ◽  
Narrative Approach ◽  
Visual Narrative ◽  
Common Practices ◽  
Visual Style ◽  
Song Lyrics ◽  
The Common

Comic ges. Based on comprehention as a narrative media, comics in Indonesia are oftenly compared to bas-reliefs on Borobudur temple and Wayang Beber.. From many kind of stories Indonesian comic books recently offered, with the developed visual wrapping, some comics steal attentions by its unique themes. These comic books are created because of the inspiration and relation to music industry. These comic books couldn't be seen from the visual style alone, as they were created in many visual genres, but they could be seen from their relations to music industry, whether the mainstream or indie ones. These comic books are published together with the music CDs, telling fictional stories from factual bands or musicians, telling a band's factual stories, or created by one of the band members. To understand modes of creation of these music industry-related-comic books, visual narrative approach will be applied. Through visual narrative approach, the band members' or musician's necessity for telling stories via comics, beside the common practices via music and song lyrics, will be observed.Keywords : Comic book, music industry, visual narrative

Studies on a Calanus Patch II. The estimation of algal productive rates

1963 ◽  
Vol 43 (2) ◽  
pp. 339-347 ◽  
Author(s):  
D. H. Cushing
Keyword(s):  
Primary Productivity ◽  
Unit Volume ◽  
Standing Stock ◽  
Single Species ◽  
Algal Community ◽  
Division Rate ◽  
Common Experience ◽  
Unit Surface ◽  
The Common ◽  
Algal Material

Algal productive rates have rarely been estimated at sea, although many estimates have been made of primary productivity as g carbon/m2/day. A distinction may be drawn between productive rate and productivity, and it is in the use of the term ‘standing stock’. The latter is the quantity of living algal material per unit volume or beneath unit surface. The productive rate is the rate at which the standing stock reproduces itself; for a given species it is of course a division rate. It is expedient to use the term ‘division rate’ for a single species, but the term ‘productive rate’ may be used for the whole algal community. The productivity is the product of standing stock and productive rate and so contains in it the very great variations of standing stock that are the common experience of all planktologists.

scholarly journals The bodily community. The gesture and the rhythm as manners of the living-together

2019 ◽  
Vol 2 (1) ◽  
pp. 10-23
Author(s):  
Maricica Munteanu
Keyword(s):  
Personal Identity ◽  
The Body ◽  
Social Aspects ◽  
Formal Approach ◽  
Ethical Implications ◽  
Common Space ◽  
Ethical Debate ◽  
Living Together ◽  
Common Practices ◽  
The Common

The present article explores the collective imaginary of the cenacle, referring to the case of Viața românească literary group from Iași, focussing on the bodily community and its representations in the common space, understood as space-in-common. This approach shifts the interest from the ideological component that is the ‘poporanism’, as promoted by Viața românească revue, to the ethical and social aspects of the community. This does not mean that the bodily community is “more real” than the ideological community, or that it translates with fidelity the common practices of the cenacle; the bodily community is in fact another form of representation, a phantasm of the living-together, analysed through Roland Barthes’s theory as the space where solitude and sociability coexist. The corporal representations of the community, always engaged in an ethical debate, is further discussed through two manners of the living-together: the gesture and the rhythm. The theoretical reference of this analysis is Marielle Macéʼs book Styles. Critique de nos formes de vie, which proposes a formal approach of life, concentrating on the ethical implications. The issues derived from this sort of reading state the relation between the body and the environment, the vicinities and the somatic interactions between the members of the cenacle, the adjustment of distances, and the maintenance of solitude inside the community. The gestures, attitudes, behaviour, verbal and non-verbal tics, clothing, the manners of speech or the rhythm of doing certain things are seen not as marks of personal identity that positions itself inside the spaces of power, but as collective signs, as form of encounter and interaction, of exposure to the others but also responsiveness of the others, of expropriation as well as appropriation, of affirmation as well as alteration of the forms of life.

scholarly journals Using Soil Solution Monitoring to Determine the Effects of Irrigation Management and Fertigation on Nitrogen Availability in High-density Apple Orchards

1998 ◽  
Vol 123 (4) ◽  
pp. 706-713 ◽  
Author(s):  
D. Neilsen ◽  
P. Parchomchuk ◽  
G.H. Neilsen ◽  
E.J. Hogue
Keyword(s):  
Soil Solution ◽  
Irrigation Water ◽  
Root Zone ◽  
Irrigation Management ◽  
Sprinkler Irrigation ◽  
Loamy Sand ◽  
N Availability ◽  
Silt Loam ◽  
N Concentration ◽  
Loam Soil

Direct application of fertilizers in irrigation water (fertigation) is an efficient method of supplying nutrients to fruit trees. Information is needed on the relationship between irrigation and N inputs on N availability in order to target nutrient applications to meet plant demands. Soil solution was collected from permanently installed suction lysimeters and NO3-N concentration was measured over the growing season in three experiments: 1) comparison of sprinkler irrigation + broadcast fertilizer with weekly fertigation + daily drip irrigation; 2) comparison of (NH4)2SO4 or Ca(NO3)2 as N sources under daily fertigation; and 3) comparisons of combinations of irrigation applied at either fixed rates or to meet evaporative demand and fertilizer (Ca(NO3)2) applied daily either at fixed rates or to maintain a given concentration in the fertigation solution in two soil types—loamy sand and silt loam. Trials are located in high density apple plantings of either `Gala' or `Empire' apple (Malus × domestica Borkh.) on M.9 rootstock. Nitrate-N concentration in the soil solution measured at 30 cm deep remained higher, over more of the growing season, for weekly fertigation + daily drip irrigation than for a single broadcast fertilizer application + sprinkler irrigation. With daily Ca(NO3)2 fertigation, soil solution NO3- N concentrations increased and decreased rapidly with the onset and end of fertigation respectively, remained relatively constant during the intervening period and were directly proportional to either the amount of N or the amount of irrigation water added. Daily fertigation with (NH4)2SO4 resulted in less control of NO3-N availability in the root-zone than with Ca(NO3)2, which may be problematic for precise timing of N nutrition. Except for the fixed irrigation rate applied to the loamy sand soil, soil solution NO3-N concentrations at 30 cm beneath the emitter were similar to average concentrations in the fertigating solution, for all methods of irrigation management in both soil types. Elevated NO3-N concentrations in soil solution below the root zone (75 cm deep) were detected in the loamy sand regardless of methods of N application and irrigation although there was some evidence of less leaching to this depth, under scheduled irrigation. In the silt loam soil, considerably lower concentrations of NO3-N were found beneath the root zone than at 30 cm deep for all of irrigation procedures and frequently there was insufficient water moving to 75 cm to provide sample. Tree growth in the loamy sand was less than in the silt loam soil; was limited by low application of irrigation water in 1992 and 1993; was unaffected by NO3-N concentration in the root zone, indicating that N inputs could be minimized by adding N to maintain concentrations of 75 μg·mL-1 or possibly less. Nitrogen inputs may also be reduced if fertilizer N and irrigation water could be retained within the root zone. For coarse-textured soils this will require precise additions of water and possibly soil amendments to improve water holding capacity.

scholarly journals Vocabulary Teaching and Learning Principles in Classroom Practices

2017 ◽  
Author(s):  
Arab World English Journal ◽  
Nur Salina Ismail ◽  
Safawati Basirah Zaid ◽  
Misrah Hamisah Mohamed ◽  
Nurazan Mohd Rouyan
Keyword(s):  
Teaching And Learning ◽  
Classroom Practices ◽  
Learning Methods ◽  
Future Studies ◽  
Proficiency Level ◽  
Common Practices ◽  
Data Points ◽  
The Common ◽  
Learning Principles ◽  
Effective Teaching And Learning

Vocabulary teaching and learning principles assist in providing effective teaching and learning methods, in accordance with the learners’ proficiency level. However, studies that looked into the relevancy of those principles are rather limited. Thus, this study focuses on finding the common practices of vocabulary teaching and learning principles in the classroom. Interviews involving three experts were done to determine their vocabulary teaching and learning principles application in their teaching. Based on the data analysed using Atlas t.i, out of ten Vocabulary Teaching and Learning Principles, only eight were practiced by the participants. The findings revealed that these experts, even though practice the principles, the approaches were varied. Finally, the data points to the need for future studies on the importance of having good vocabulary instructions in teaching and learning vocabulary.

scholarly journals Analisis Rasio Prestasi Manajemen Irigasi pada Distribusi Air di Subak Kabupaten Tabanan

2019 ◽  
Vol 8 (2) ◽  
pp. 290
Author(s):  
Yuda Arnanda ◽  
I Wayan Tika ◽  
Ida Ayu Luh Gede Bintang Madrini
Keyword(s):  
Irrigation Water ◽  
Water Distribution ◽  
Local Community ◽  
Irrigation System ◽  
Irrigation Management ◽  
Secondary Data ◽  
Survey Method ◽  
Irrigation Area ◽  
Water Supply Management ◽  
Principles Of Justice

Sistem subak adalah merupakan salah satu bentuk sistem irigasi yang mampu mengakomodasikan dinamika sistem sosio-teknis masyarakat setempat. Air irigasi dikelola dengan prinsip-prinsip keadilan, keterbukaan, harmoni dan kebersamaan, melalui suatu organisasi yang fleksibel yang sesuai dengan kepentingan masyarakat. Sistem irigasi erat kaitannya tentang pendistribusian air irigasi pada subak yang berdasarkan luas lahan. Salah satu aspek yang akan dinilai dalam sistem irigasi adalah Rasio Prestasi Manajemen (RPM) irigasi Tujuan penelitian ini adalah untuk mengetahui klasifikasi RPM di suatu subak dengan pemberian skor pada masing-masing klasifikasi RPM. Perolehan data sekunder dilakukan dengan metode survey, pengamatan secara langsung dan pengukuran. Data yang telah dikumpulkan selanjutnya akan dianalisis menggunakan metode Rasio Prestasi Manajemen (RPM) Irigasi. RPM irigasi setiap subak dinilai dengan menggunakan empat rentang nilai yaitu Baik bila 0.75 < RPM <1.25, Cukup bila 0.60 < RPM < 0.75 atau 1.25 < RPM < 1.40, Kurang 0.40 < RPM< 0.60 atau 1.40 <RPM<1.60 dan Sangat kurang bila RPM < 0.40 atau RPM >1.60 Hasil metode analisis rasio prestasi manajemen irigasi pada distribusi air di subak diperoleh RPM daerah hulu yaitu Pama Palian, Aya I dan Aya II memiliki RPM yang Baik yaitu rata-rata 100%. Ketersediaan air yang begitu melimpah karena subak daerah hulu, subak yang pertama kali mengambil air di daerah irigasi. Dan yang paling penting adalah sistim pengaturan pemberian air yang sudah optimal. Untuk subak daerah tengah RPM sedikit berbeda dengan di daerah hulu. Rata-rata RPM daerah irigasi tengah yang mempunyai kreteria Cukup yaitu sebesar 15,5% sedangkan Baik 84,5%. Untuk daerah irigasi tengah yang memiliki kriteria RPM cukup dengan nilai 15,5% disebabkan oleh pendistribusian air tidak seoptimal seperti daerah irigasi hulu. Untuk Subak daerah irigasi hilir rata-rata RPM secara keseluruhan yaitu 100% baik, ini disebabkan karena pembagian pendistribusian air daerah irigasi hilir sudah optimal sesuai dengan luas lahan.   Subak system is one form of irrigation system that is able to accommodate the dynamics of the socio-technical system of the local community. Irrigation water is managed with the principles of justice, openness, harmony and togetherness, through a flexible organization that is in accordance with the interests of the community. Irrigation systems are closely related to the distribution of irrigation water in subaks based on land area. One aspect that will be assessed in an irrigation system is the Irrigation Management Achievement Ratio (RPM). The purpose of this study is to determine the RPM classification in a subak by scoring in each RPM classification. Secondary data acquisition is done by survey method, direct observation and measurement. The collected data will then be analyzed using the Irrigation Management Achievement Ratio (RPM) method. Irrigation RPM for each subak is assessed using four ranges of values, namely Good if 0.75 <RPM <1.25, Enough if 0.60 <RPM <0.75 or 1.25 <RPM <1.40, Less 0.40 <RPM <0.60 or 1.40 <RPM <1.60 and Very less if RPM <0.40 or RPM> 1.60 The results of the analysis method of irrigation management achievement ratio in the distribution of water in the subak obtained by the upstream area RPM namely Pama Palian, Aya I and Aya II have a good RPM that is an average of 100%. The availability of water is so abundant due to the upstream subak, the first subak to take water in an irrigation area. And the most important thing is the optimal water supply management system. For the subak area the RPM is slightly different from the upstream area. The average RPM of the central irrigation area that has sufficient criteria is 15.5% while 84.5% is good. For the central irrigation area which has sufficient RPM criteria with a value of 15.5% caused by the distribution of water is not as optimal as the upstream irrigation area. For Subak downstream irrigation areas the overall average RPM is 100% good, this is because the distribution of downstream irrigation water distribution is optimal according to the area of ??land.

Sign in / Sign up

Export Citation Format

Share Document