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Journal articles on the topic 'Drip Irrigation, low pressure'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Mostafa, H., and H. H. Thörmann. "On-farm evaluation of low-pressure drip irrigation system for smallholders." Soil and Water Research 8, No. 2 (2013): 87–95. http://dx.doi.org/10.17221/29/2012-swr.

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The aim of this paper was to evaluate the performance of a low-pressure drip system (LPS) for three years of service, to calculate the consumptive working time and costs of maintenance and laterals retrieving before harvesting and to determine benefits and problems with drip irrigation. Drip irrigation provides the opportunity to save water and the potential to increase net income by applying water at the right quantity and at the right time. Small to medium fields would benefit from the LPS irrigation system which has the ability to distribute the amount of water applied. LPS is a well-resear

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2

Domullodzhanov, Daler. "Drip irrigation technology for potatoes through applying low-pressure semistationary small-capacity." Melioration and Water Management, no. 6 (January 22, 2021): 4–8. http://dx.doi.org/10.32962/0235-2524-2020-6-4-8.

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The article describes the results of field and laboratory experiments on the study of the technology of drip irrigation of potatoes via using the semi-stationary low-pressure small-capacity drip irrigation system (LDIS) developed by us. Reinforced aluminium micro-tubes ensure uniform watering. Depending on the annual precipitation sufficiency, the potatoes irrigation requirements 1700…3400 m3/ha, the number of irrigations varied from 10 to 20 times, and the yield was between 54…58,2 tons per ha.

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Sokol, Julia, Susan Amrose, Vinay Nangia, et al. "Energy Reduction and Uniformity of Low-Pressure Online Drip Irrigation Emitters in Field Tests." Water 11, no. 6 (2019): 1195. http://dx.doi.org/10.3390/w11061195.

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A promising way of addressing the issue of growing water scarcity is through wider use of drip irrigation, which delivers water and fertilizer to crops in a slow, targeted manner, and has been shown to increase yields and water use efficiency. Yet, drip irrigation system adoption is low, primarily due to the high capital cost of the pressurized piping network and the pump, and operating energy cost. Lowering the water pressure needed for drip emitters to deliver water can reduce both capital and operating costs of drip systems. Here we present the results from field trials of new pressure-comp

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Rowell, Brent, and Mar Lar Soe. "Design, Introduction, and Extension of Low-Pressure Drip Irrigation in Myanmar." HortTechnology 25, no. 4 (2015): 422–36. http://dx.doi.org/10.21273/horttech.25.4.422.

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Drip irrigation is used extensively by both large and small commercial horticultural crop growers in most developed countries where benefits include not only high water use efficiency, but also higher yields, improved product quality, and reduced incidence of foliar disease. Drip systems are still relatively new and expensive in Southeast Asia, and it is primarily wealthier farmers who currently enjoy its benefits. There are also significant perceptual barriers to adoption as many farmers are accustomed to applying copious amounts of water to horticultural crops and are unfamiliar with drip or

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Kalashnikov, Aleksander, Nurlan Abduramanov, Pavel Kalashnikov, Aigul Bayzakova, and Nurzhau Rysmahanov. "Optimization of Low-Pressure Hydrocyclone Sizes for Drip Irrigation System." Journal of Advanced Research in Dynamical and Control Systems 12, no. 05-SPECIAL ISSUE (2020): 191–98. http://dx.doi.org/10.5373/jardcs/v12sp5/20201748.

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6

Wang, Yalin, Xueliang Ju, Shijiang Zhu, and Meng Li. "Simulation of local head loss of drip-irrigation tape with integrated in-line emitters as a function of cross section." Spanish Journal of Agricultural Research 18, no. 4 (2020): e0210. http://dx.doi.org/10.5424/sjar/2020184-15767.

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Aim of study: To investigate how the cross section of a drip-irrigation tape affects local head loss.Area of study: The work was carried out in the laboratory of Irrigation hydraulics, College of Water Conservancy and Environment, Three Gorges University, Yichang, Hubei province.Material and methods: Tapes with six different wall thicknesses were studied experimentally to determine the relationship between cross-section deformation, wall thickness, and pressure. Based on the experimental results, we determined the factors that influence local head loss in drip-irrigation tapes by numerical sim

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Yan, Xin Fang, and Jun Cang Tian. "Study of Application on Reverse Osmosis Concentrated Water Circulation in Desert Greenhouse." Applied Mechanics and Materials 409-410 (September 2013): 287–93. http://dx.doi.org/10.4028/www.scientific.net/amm.409-410.287.

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Aiming at the problem of concentrated water discharge amount is larger and the recovery rate is low in desert greenhouse for desalination of brackish water,Using reverse osmosis concentrated water circulation system.The results showed: With less dense water emissions, System desalinization rate decreases, system recovery rate increases, water flow in the system decreases, the system water pressure increases. In this test, when dense water emissions is 0.81m3/h, System desalinization rate reaches up to 91%, system recovery rate reached up to 81%, saving water above 20%. Major ion SO42-, Cl-, Ca

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8

Muxammadiyeva, Matluba, and Iftixor Ergashev. "IMPLEMENTATION OF THE WATER USE PLAN PROCEDURES, MEASURES AND WATER USE." JOURNAL OF AGRO PROCESSING 6, no. 2 (2020): 50–58. http://dx.doi.org/10.26739/2181-9904-2020-6-9.

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If we look at the existing irrigation methods used today in the country, then they are divided into: ground, rainfall, underground or underground, drip and spray. Basically, they are transferred to the irrigation field in two forms: through gravity and pressure irrigation systems. Naturally, a gravity irrigation system is economically more expensive than a low pressure irrigation system. However, from a performance appraisal stand point, pressure irrigation methods are less efficient and have serious disadvantages

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Chirgwin, Gavin Andrew, and Bruce Sutton. "A low-cost, high-precision drip emitter suitable for low-pressure micro-irrigation systems." Irrigation Science 37, no. 6 (2019): 725–35. http://dx.doi.org/10.1007/s00271-019-00641-7.

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10

Al-Mefleh, Naji K., Samer Talozi, and Khaled Abu Naser. "Assessment of Treated Wastewater Reuse in Drip Irrigation under Different Pressure Conditions." Water 13, no. 8 (2021): 1033. http://dx.doi.org/10.3390/w13081033.

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This study aims to investigate the influence of treated wastewater (TWW) on the hydraulic performance of drip irrigation emitters. A field experiment was conducted in order to test two types of online emitters, a low pressure (LP) and a standard pressure (SP), at different working pressures (0.25 bar, 0.50 bar, and 1.00 bar) using TWW. The emitters were initially evaluated in the laboratory and the field for the discharge exponent (X), discharge coefficient (Kd), average emitter discharge (Qavg), coefficient of variation (CV), distribution uniformity (DU), the mean discharge ratio (Dra), and t

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Oliveira, Cleomar Ferreira de, Marconi Batista Teixeira, Adriana Ramos, Renato Moreira da Silva, Pedro Henrique Pinto Ribeiro, and José Antônio Frizzone. "PORTABLE SAND FILTER FOR SMALL DRIP IRRIGATION SYSTEMS." IRRIGA 21, no. 1 (2018): 90. http://dx.doi.org/10.15809/irriga.2016v21n1p90-103.

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PORTABLE SAND FILTER FOR SMALL DRIP IRRIGATION SYSTEMS CLEOMAR FERREIRA DE OLIVEIRA1; MARCONI BATISTA TEIXEIRA2*; ADRIANA RAMOS3; RENATO MOREIRA DA SILVA4; PEDRO HENRIQUE PINTO RIBEIRO5 E JOSÉ ANTÔNIO FRIZZONE6 1 Engenheiro Agrônomo, Prof. Dr. IFMinas Gerais - Campus Muzambinho, MG.2 Engenheiro Agrônomo, Prof. Dr. IFGoiano - Campus Rio Verde, GO. *E-mail: marconibt@gmail.com3 Engenheira Agrônoma, Profa. Dra. Universidade Estadual de Santa Cruz – Ilhéus, BA.4 Engenheiro Agrônomo, Doutor, Departamento de Engenharia de Biossistemas, LEB - ESALQ/USP, Piracicaba - SP.5 Tecnólogo em Irrigação e Dren

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Bordovsky, James P. "Low-Energy Precision Application (LEPA) Irrigation: A Forty-Year Review." Transactions of the ASABE 62, no. 5 (2019): 1343–53. http://dx.doi.org/10.13031/trans.13117.

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Abstract. The low-energy precision application (LEPA) irrigation concept was developed 40 years ago (ca. 1978) to address the depletion of irrigation water from the Ogallala Aquifer and the sharp increase in pumping costs caused by the 1970s fuel crisis occurring at that time in the Texas High Plains. The LEPA method applies water to the soil surface at low pressure using a tower-truss irrigation system that continually moves through the field. This method brought changes in irrigation equipment and management that resulted in improvements in water productivity, particularly in semi-arid locat

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13

Thompson, E. J., G. P. Merkley, A. A. Keller, and S. L. Barfuss. "Experimental Determination of the Hydraulic Properties of Low-Pressure, Lay-Flat Drip Irrigation Systems." Journal of Irrigation and Drainage Engineering 137, no. 1 (2011): 37–48. http://dx.doi.org/10.1061/(asce)ir.1943-4774.0000269.

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14

Poh, Bee Ling, Aparna Gazula, Eric H. Simonne, Robert C. Hochmuth, and Michael R. Alligood. "Use of Reduced Irrigation Operating Pressure in Irrigation Scheduling. II. Effect of Reduced Irrigation System Operating Pressure on Drip-tape Flow Rate, Water Application Uniformity, and Soil Wetting Pattern on a Sandy Soil." HortTechnology 21, no. 1 (2011): 22–29. http://dx.doi.org/10.21273/horttech.21.1.22.

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For shallow-rooted vegetables grown in sandy soils with low water-holding capacity (volumetric water content <10%), irrigation water application rate needs to provide sufficient water to meet plant needs, to avoid water movement below the root zone, and to reduce leaching risk. Because most current drip tapes have flow rates (FRs) greater than soil hydraulic conductivity, reducing irrigation operating pressure (OP) as a means to reduce drip emitter FR may allow management of irrigation water application rate. The objectives of this study were to determine the effect of using a reduced syste

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15

Tognetti, R., M. Palladino, A. Minnocci, S. Delfine, and A. Alvino. "The response of sugar beet to drip and low-pressure sprinkler irrigation in southern Italy." Agricultural Water Management 60, no. 2 (2003): 135–55. http://dx.doi.org/10.1016/s0378-3774(02)00167-1.

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16

Garabedian, Sahag. "Effects of Nonfumigant Nematicides Applied Through Low-Pressure Drip Irrigation on Control ofMeloidogyne incognitaon Tomatoes." Plant Disease 69, no. 2 (1985): 138. http://dx.doi.org/10.1094/pd-69-138.

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17

Sarker, Hossain, Murad, et al. "Development and Evaluation of an Emitter with a Low-Pressure Drip-Irrigation System for Sustainable Eggplant Production." AgriEngineering 1, no. 3 (2019): 376–90. http://dx.doi.org/10.3390/agriengineering1030028.

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Drip-irrigation can improve uniformity in water distribution, water use efficiency, and crop productivity in the saline and nonsaline regions of South Asia and in Bangladesh where the availability and quality of water resources are scare for sustainable crop production. However, the currently available drip-irrigation systems (DIS) have limitations especially in the design and field performance of emitters. A new type of emitter with low pressure (gravity) was developed, installed and evaluated using the locally produced materials in two locations (nonsaline and saline zones) of Bangladesh. Th

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18

Zhang, Chao, Yaohu Kang, Shufang Jiang, Shuqin Wan, and Shiping Liu. "Assessment of Hydraulic Performance of Drip-Irrigation Emitters at Low Head Pressures." Journal of Irrigation and Drainage Engineering 137, no. 11 (2011): 730–34. http://dx.doi.org/10.1061/(asce)ir.1943-4774.0000363.

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19

Palada, M., A. C. Mercado, M. Roberts, et al. "FARMERS' EXPERIENCES WITH LOW-PRESSURE DRIP IRRIGATION FOR VEGETABLE PRODUCTION IN SOUTHEAST ASIA AND THE PACIFIC." Acta Horticulturae, no. 921 (December 2011): 49–56. http://dx.doi.org/10.17660/actahortic.2011.921.5.

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20

Woltering, Lennart, Ali Ibrahim, Dov Pasternak, and Jupiter Ndjeunga. "The economics of low pressure drip irrigation and hand watering for vegetable production in the Sahel." Agricultural Water Management 99, no. 1 (2011): 67–73. http://dx.doi.org/10.1016/j.agwat.2011.07.017.

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21

Thabet, Mohamed. "Drip irrigated Barley (Hordeum vulgare L.) in arid regions of South Tunisia: Plant Growth and Yield Parameters." Turkish Journal of Agriculture - Food Science and Technology 4, no. 6 (2016): 470. http://dx.doi.org/10.24925/turjaf.v4i6.470-475.663.

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Historically relegated to the status of “poor man’s bread” barley is one of widely cultivated crops in arid regions of south Tunisia for its grain and biomass used as an animal feed and other various purposes. Barley is incorporated into many types of home recipes. Harsh climate and frequent droughts are the great challenge for cereals production so farmers must supply irrigation in order to improve yields. Traditional irrigation techniques are widely used despite their low efficiency. Conversion to drip is encouraged by public services as a measure to save water resources, boost yields and as

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22

Jha, Shiva Kumar, Mita Tarafder, Deepak Dhibar, Bhanu Pokharel, Jiban Shrestha, and Keshab Babu Koirala. "Design and Development of Soil Moisture Based Automatic Irrigation System in Nepal." Journal La Multiapp 1, no. 3 (2020): 43–53. http://dx.doi.org/10.37899/journallamultiapp.v1i3.197.

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A prototype soil moisture based an automated irrigation system were developed at National Maize Research Program in 2018 to study the water requirement of drought tolerant crop genotype. The irrigation system has been controlled by Arduino UNO as a micro controller. The instant soil moisture data were collected either in Excel format or graphical format using internet of things through the programming of Global System for Mobile Communication: Subscriber Identity Module (GSM:SIM card) of Nepal Telecom. The developed automated irrigation system has found maintained the predetermined threshold s

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23

Karlik, John F., J. Ole Becker, and Ursula K. Schuch. "022 Delivery of Gases to the Soil Matrix via Buried Drip Irrigation Tubing." HortScience 34, no. 3 (1999): 444E—445. http://dx.doi.org/10.21273/hortsci.34.3.444e.

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The impending worldwide restrictions on the use of methyl bromide (MeBr) as a soil fumigant have prompted an intensive search for more-effective methods for delivering MeBr or replacement compounds. Although the majority of agrochemicals are applied in the solid phase or the liquid phase at ambient pressure and temperature, some chemicals, including certain soil fumigants such as MeBr, are gases under normal field conditions. Experiments were conducted to evaluate use of two types of commercial drip irrigation tubing to deliver gases to nontarped planting beds. Air moved through each tubing ty

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24

Zhang, Kai, Bo Song, and Delan Zhu. "The Development of a Calculation Model for the Instantaneous Pressure Head of Oscillating Water Flow in a Pipeline." Water 11, no. 8 (2019): 1583. http://dx.doi.org/10.3390/w11081583.

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Sinusoidal oscillating water flow at low pressure can improve the anti-clogging ability of an emitter in drip irrigation or the water distribution of a nozzle in sprinkler irrigation and reduce the cost and energy consumption of the irrigation system. In this study, the characteristics of instantaneous pressure head attenuation of oscillating water flow along a pipeline have been investigated. By using a complex function to solve the continuity equation and the momentum equation of a pipeline with water hammer motion and using the Darcy–Weisbach formula to estimate the head loss, a calculation

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25

Muñoz-Carpena, Rafael, Yuncong C. Li, Waldemar Klassen, and Michael D. Dukes. "Field Comparison of Tensiometer and Granular Matrix Sensor Automatic Drip Irrigation on Tomato." HortTechnology 15, no. 3 (2005): 584–90. http://dx.doi.org/10.21273/horttech.15.3.0584.

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A low-volume/high frequency (LVHF) soil moisture-based drip irrigation system was tested on a shallow sandy soil at a commercial tomato (Lycopersicon esculentum) farm in southern Florida. Six LVHF irrigation treatments were compared with the standard commercial practice on the farm (control), where a portable pump was used for manual drip irrigation twice each week. In the six LVHF treatments the system was continuously pressurized by means of an electrical pump and a pressure tank, and controlled by an irrigation timer set to irrigate a maximum of five times per day with the irrigation time (

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Melo, Verônica G. M. L., Ana C. S. Araújo, Antonio P. Camargo, Leonardo L. Melo, José A. Frizzone, and Wagner W. A. Bombardelli. "Head Loss in Thin-Walled Drip Tapes with Continuous Labyrinth." Scientific World Journal 2019 (December 10, 2019): 1–11. http://dx.doi.org/10.1155/2019/8640893.

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Thin-walled drip tapes with continuous labyrinth have been used for irrigation of vegetables and other short-cycle crops, especially due to their low cost. The continuous labyrinths welded into the pipe inner wall affect the head loss along such emitting pipes. In addition, the flow cross section of thin-walled pipes may change due to the effects of the operating pressure, which also has consequences for the head loss. The objective of this work was to investigate experimentally the friction factor and the head loss on thin-walled drip tapes with continuous labyrinths operated under various pr

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27

Woltering, Lennart, Dov Pasternak, and Jupiter Ndjeunga. "The African market garden: The development of a low-pressure drip irrigation system for smallholders in the sudano sahel." Irrigation and Drainage 60, no. 5 (2011): 613–21. http://dx.doi.org/10.1002/ird.610.

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28

PÉREZ ORTOLÁ, M., and J. W. KNOX. "WATER RELATIONS AND IRRIGATION REQUIREMENTS OF ONION (ALLIUM CEPA L.): A REVIEW OF YIELD AND QUALITY IMPACTS." Experimental Agriculture 51, no. 2 (2014): 210–31. http://dx.doi.org/10.1017/s0014479714000234.

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SUMMARYThe results of international research on the water relations and irrigation needs of onions have been synthesised in an attempt to link fundamental studies on crop physiology to irrigation practices, and consequent impacts on crop yield, quality and storage. Following a brief introduction on its origins and centres of production, a synthesis of research on crop development including plant water relations, crop water requirements, yield response to water, irrigation systems and scheduling are presented. Most of the evidence stems from research conducted in arid and semi-arid regions, not

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29

Piromchai, Patorn, Charoiboon Puvatanond, Virat Kirtsreesakul, Saisawat Chaiyasate, and Sanguansak Thanaviratananich. "Effectiveness of nasal irrigation devices: a Thai multicentre survey." PeerJ 7 (May 27, 2019): e7000. http://dx.doi.org/10.7717/peerj.7000.

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Background Nasal irrigation is widely used as an adjunctive treatment for nasal diseases. There is little evidence regarding the efficacy of the devices used in this procedure. The objective of this survey was to evaluate the effectiveness of nasal irrigation devices based on the experiences of patients and physicians. Methods We conducted a multicentre survey study between November 2017 and October 2018. Physician and patient questionnaires were developed based on the available literature and expert opinion. The physician questionnaire was submitted to the Otolaryngology residents and staff o

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30

Ajaz, Ali, Sumon Datta, and Scott Stoodley. "High Plains Aquifer–State of Affairs of Irrigated Agriculture and Role of Irrigation in the Sustainability Paradigm." Sustainability 12, no. 9 (2020): 3714. http://dx.doi.org/10.3390/su12093714.

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Groundwater depletion is a serious issue in the southern and central parts of the High Plains Aquifer (HPA), USA. A considerable imbalance exists between the recharge process and groundwater extractions in these areas, which threatens the long-term sustainability of the aquifer. Irrigated agriculture has a major share in the economy, and it requires high pumping rates in regions vulnerable to large groundwater level declines. A literature review has been conducted to understand the state of affairs of irrigated agriculture in the HPA, along with the dynamics of groundwater decline and recharge

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31

Silva, Cláudio Ricardo da, Marcos Vinícius Folegatti, Tonny José Araújo da Silva, José Alves Júnior, Claudinei Fonseca Souza, and Rafael Vasconcelos Ribeiro. "Water relations and photosynthesis as criteria for adequate irrigation management in 'Tahiti' lime trees." Scientia Agricola 62, no. 5 (2005): 415–22. http://dx.doi.org/10.1590/s0103-90162005000500001.

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Irrigation scheduling based on soil moisture status is one of the most useful methods because of its practicality and low cost. The effects of available soil water depletion on evapotranspiration (ETc), transpiration (E), leaf water potential at predawn (psiP) and midday (psiM), stomatal conductance (gs) and net CO2 assimilation (A) in lime 'Tahiti' trees (Citrus latifolia) were evaluated to improve irrigation schedule and minimize water use without causing water stress. The trees were spaced 7 <FONT FACE=Symbol>´</FONT> 4 m and drip-irrigated by four drippers with the available so

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32

Leib, Brian, Wesley Wright, Tim Grant, et al. "Rainwater Harvesting with Solar and Gravity Powered Irrigation for High Tunnels." Applied Engineering in Agriculture 36, no. 4 (2020): 489–98. http://dx.doi.org/10.13031/aea.13969.

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HIGHLIGHTS Captured rainwater supplied nearly all the irrigation required for high tunnels in Tennessee. Solar pumping and/or gravity flow adequately supplied the pressure required for irrigation in high tunnels. Rainwater harvesting costs need to be reduced in order to be more competitive with alternate water sources. Abstract . High tunnels use clear plastic film over a large metal frame to trap solar radiation as heat in order to extend the crop growing season and reduce environmental stress. High tunnels differ from high tech greenhouses in that they use the natural soil as the growing med

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Gaspar Martins Leite de Melo, Verônica, Leonardo Leite de Melo, José Antônio Frizzone, Antônio Pires de Camargo, and Patricia Angélica Alves Marques. "PERDA DE CARGA EM FITAS GOTEJADORAS COM EMISSORES MOLDADOS." IRRIGA 1, no. 1 (2019): 86–93. http://dx.doi.org/10.15809/irriga.2019v1n1p86-93.

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PERDA DE CARGA EM FITAS GOTEJADORAS COM EMISSORES MOLDADOS   VERÔNICA GASPAR MARTINS LEITE DE MELO1; LEONARDO LEITE DE MELO2; JOSÉ ANTÔNIO FRIZZONE3; antônio pires de camargo4 E patricia algélica alves marques5  1 Departamento de Engenharia de Sistemas Agrícola, ESALQ/USP, Av. Pádias, 11, São Dimas, CEP13418-900, Piracicaba, SP, Brasil, e-mail: veronica.martins@usp.br  2 Departamento de Engenharia de Sistemas Agrícola, ESALQ/USP, Av. Pádias, 11, São Dimas, CEP13418-900, Piracicaba, SP, Brasil, e-mail: leoleitemelo@usp.br 3 Departamento de Engenharia de

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Mosca, Marcos Antonio, Roberto Testezlaf, and Eder Pereira Gomes. "DESENVOLVIMENTO DE EMISSORES ALTERNATIVOS PARA IRRIGAÇÃO SUBSUPERFICIAL DE BAIXA PRESSÃO." IRRIGA 10, no. 3 (2005): 249–62. http://dx.doi.org/10.15809/irriga.2005v10n3p249-262.

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DESENVOLVIMENTO DE EMISSORES ALTERNATIVOS PARA IRRIGAÇÃO SUBSUPERFICIAL DE BAIXA PRESSÃO Marcos Antonio Mosca; Roberto Testezlaf; Eder Pereira GomesFaculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, SP, marcos.mosca@agr.unicamp.br 1 RESUMO A busca pela minimização da quantidade de água aplicada na agricultura pela irrigação, vem intensificando pesquisas que visam aumentar o acesso de tecnologias de irrigação mais eficientes aos agricultores, e, conseqüentemente, incentivando o uso de métodos de aplicação localizada. Com o objetivo de contribuir com informações que l

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35

Robles Rovelo, Cruz Octavio, Nery Zapata Ruiz, Javier Burguete Tolosa, Jesús Ramiro Félix Félix, and Borja Latorre. "Characterization and Simulation of a Low-Pressure Rotator Spray Plate Sprinkler Used in Center Pivot Irrigation Systems." Water 11, no. 8 (2019): 1684. http://dx.doi.org/10.3390/w11081684.

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Spray sprinklers enable to operate at low pressures (<103 kPa) in self-propelled irrigation machines. A number of experiments were performed to characterize the water distribution pattern of an isolated rotator spray plate sprinkler operating at very low pressure under different experimental conditions. The experiments were performed under two pressures (69 kPa and 103 kPa) and in calm and windy conditions. The energy losses due to the impact of the out-going jet with the sprinkler plate were measured using an optical technique. The adequacy to reproduce the measured water distribution patt

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Souza, Rodrigo Otávio Rodrigues de Melo, Gerardo Felipe Espinoza Pérez, and Tarlei Arriel Botrel. "IRRIGAÇÃO LOCALIZADA POR GRAVIDADE COM MICROTUBOS." IRRIGA 11, no. 2 (2006): 266–79. http://dx.doi.org/10.15809/irriga.2006v11n2p266-279.

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IRRIGAÇÃO LOCALIZADA POR GRAVIDADE COM MICROTUBOS Rodrigo Otávio Rodrigues de Melo Souza; Gerardo Felipe Espinoza Pérez; Tarlei Arriel BotrelInstituto Centro Tecnológico de Ensino – CENTEC, Fortaleza, CE, rmelosouza@hotmail.com 1 RESUMO Os objetivos deste trabalho foram: dimensionar, implantar e avaliar um sistema de irrigação com microtubos por gravidade; e apresentar o custo do sistema com microtubos comparando-o com o custo do “kit” para irrigação localizada por gravidade, disponível no mercado. O experimento foi dividido em duas etapas, sendo que a primeira consistiu no dimensionamento, el

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Popov, V. M., and M. M. Targoniy. "SUBSTANTIATION OF ENERGY EFFICIENT WATER SUPPLY IN CLOSED IRRIGATION SYSTEMS." Міжвідомчий тематичний науковий збірник "Меліорація і водне господарство", no. 2 (December 12, 2019): 243–49. http://dx.doi.org/10.31073/mivg201902-192.

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Relevance of research. The research is aimed at improving the energy efficiency of automated water supply in irrigation systems. The purpose and objectives of research. The purpose of the research is to reduce the specific energy consumption for pumping water by pumping stations (PS) in closed irrigation systems (CIS). The task is to substantiate the efficiency of the method of automated control of water supply to the CIS when regulating the pressure at the outlet of the pumping station, which is set by the sum of hydraulic losses in the network from the pumping station to irrigation equipment

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Ngouajio, Mathieu, Rafael Auras, R. Thomas Fernandez, Maria Rubino, James W. Counts, and Thitisilp Kijchavengkul. "Field Performance of Aliphatic-aromatic Copolyester Biodegradable Mulch Films in a Fresh Market Tomato Production System." HortTechnology 18, no. 4 (2008): 605–10. http://dx.doi.org/10.21273/horttech.18.4.605.

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Removal and disposal of polyethylene mulch in vegetable production represents a high economic and environmental cost to society. This study was conducted in 2006 and 2007 at Michigan State University to test the field performance of new biodegradable mulches using ‘Mountain Fresh Plus’ tomato (Solanum lycopersicum) as a model crop. Treatments included two biodegradable mulches (black and white), each with two thicknesses (35 and 25 μm). A conventional low-density polyethylene (LDPE) mulch of 25 μm was included as a control (a mulch commonly used by vegetable growers). Data loggers were install

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Feng, Ji, Weinan Wang, and Haisheng Liu. "Study on Fluid Movement Characteristics inside the Emitter Flow Path of Drip Irrigation System Using the Yellow River Water." Sustainability 12, no. 4 (2020): 1319. http://dx.doi.org/10.3390/su12041319.

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Vigorously developing efficient water-saving agricultural technologies using the Yellow River Water is an important way to achieve sustainable use of water resources. In order to clarify the fluid movement characteristics inside the flow path of the emitter under complicated water quality conditions in a drip irrigation system using the Yellow River Water, the optimal simulation turbulence model for the flow field in the flow path of the emitter was determined by comparing the macroscopic hydraulic characteristics with the microscopic fluid motion characteristics of the fluid in the emitter. O

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Solé-Torres, Carles, Freddie R. Lamm, Miquel Duran-Ros, Gerard Arbat, Francisco Ramírez de Cartagena, and Jaume Puig-Bargués. "Assessment of Microirrigation Field Distribution Uniformity Procedures for Pressure-Compensating Emitters under Potential Clogging Conditions." Transactions of the ASABE 64, no. 3 (2021): 1063–71. http://dx.doi.org/10.13031/trans.14486.

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HighlightsDistribution uniformity of the lower quartile (DUlq) was assessed in three microirrigation subunits with three procedures that used different locations and different numbers of sampled emitters.Using reclaimed effluent as the water source, performance was periodically measured for a total duration of 1000 h.Emitter clogging and the locations of sampled emitters greatly affected DUlq.None of the procedures accurately assessed DUlq if more than 4% of the emitters were fully clogged.Abstract. Proper water distribution uniformity is important for successful use of microirrigation systems

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Yıldırım, Gürol. "Discussion of “Assessment of Hydraulic Performance of Drip-Irrigation Emitters at Low Head Pressures” by Chao Zhang, Yaohu Kang, Shufang Jiang, Shuqin Wan, and Shiping Liu." Journal of Irrigation and Drainage Engineering 140, no. 3 (2014): 07014003. http://dx.doi.org/10.1061/(asce)ir.1943-4774.0000597.

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Sanchez, Charles A. "Response of Lettuce to Water and Nitrogen on Sand and the Potential for Leaching of Nitrate-N." HortScience 35, no. 1 (2000): 73–77. http://dx.doi.org/10.21273/hortsci.35.1.73.

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The low desert region of Arizona is the major area of lettuce (Lactuca sativa L.) production in the United States during the winter. Lettuce is commonly grown on the loam, clay loam, and clay soils of the alluvial river valleys. There is some interest in moving a portion of the vegetable production onto the sandy soils of the terraces (mesa) above the alluvial river valley to partially relieve the intensive production pressure being placed on lands in the valley. Of major concern in these sandy soils is water and N management. Studies were conducted during two seasons to evaluate the response

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Benin, Dmitry, and Vera Snezhko. "Water flow regulator for irrigation canals." E3S Web of Conferences 264 (2021): 03038. http://dx.doi.org/10.1051/e3sconf/202126403038.

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A distinctive feature of the irrigated systems of the Russian Federation is a large area of irrigated areas and a significant length of irrigation canals. With a large area of the irrigated massif on small canals, the use of electricity to regulate the throughput of network hydraulic structures is economically ineffective. Preference is given to means of hydraulic automation of water supply. Regulation of the throughput of a hydraulic structure is based on the laws of fluid flow within it. On irrigation canals in Russia, as in world practice, water-operated gates are widely used. One of the di

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Coolong, Timothy. "Yellow Squash and Zucchini Cultivar Evaluation in Georgia." HortTechnology 27, no. 2 (2017): 296–302. http://dx.doi.org/10.21273/horttech03605-16.

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Ten yellow squash (Cucurbita pepo) and nine zucchini (C. pepo) cultivars were evaluated in southwest Georgia during spring and fall growing seasons in 2014 and 2015. Plants were grown using plastic mulch and drip irrigation following standard production practices for squash in Georgia. Plants were harvested 10 to 13 times during each study season. Fruit were graded into fancy, medium, and culls. Virus pressure was low during the trials. For yellow squash yields, there were significant cultivar by season interactions; however, Solstice, a straightneck yellow squash, and Gentry, a crookneck cult

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Archana, HA, N. Asoka Raja, R. Mahesh, and R. Kalpana. "Effect of Low Cost Drip Tape Irrigation System on Yield and Economics of Sweet Corn." Bangladesh Agronomy Journal 19, no. 2 (2017): 71–77. http://dx.doi.org/10.3329/baj.v19i2.31855.

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A study was conducted to determine the effect of low cost drip tape irrigation system on yield and economics of sweet corn in comparison to conventional inline drip irrigation and surface irrigation systems during 2013-14 at Coimbatore, India. The treatment comprises of two drip irrigation systems with three irrigation levels viz., 75, 100 and 125% of pan evaporation (PE) from Class A Pan evaporimeter. Plant height, fresh cob length, girth, number of kernels per cob and single fresh cob weight and yield were higher at 125% PE in conventional in line drip irrigation system and it was statistica

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Bagarello, V., V. Ferro, G. Provenzano, and D. Pumo. "Evaluating Pressure Losses in Drip-Irrigation Lines." Journal of Irrigation and Drainage Engineering 123, no. 1 (1997): 1–7. http://dx.doi.org/10.1061/(asce)0733-9437(1997)123:1(1).

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Lilley, Jason M., and Elsa S. Sánchez. "The Potential of Strip Tillage and Rowcovers for Organic Cucurbit Production." HortTechnology 26, no. 5 (2016): 628–36. http://dx.doi.org/10.21273/horttech03405-16.

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Plasticulture systems, the use of polyethylene mulch on raised beds with drip irrigation, are commonly used for the production of many cucurbit (Cucurbitaceae) crops. Although the use of plasticulture systems has many benefits, disadvantages include plastic disposal issues and costs and the intensive tillage required for installation. Strip tillage systems have been shown to decrease soil erosion, increase soil moisture retention, and increase soil microbial communities. Spunbonded polyethylene rowcover use has been shown to decrease early season striped cucumber beetle (Acalymma vittatum) and

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Arriero, Stephanie S., Willian F. de Almeida, Vital P. da S. Paz, and Lucas F. Damasceno. "Yield of eggplant using low quality water and pulse drip irrigation." Revista Brasileira de Engenharia Agrícola e Ambiental 24, no. 12 (2020): 822–26. http://dx.doi.org/10.1590/1807-1929/agriambi.v24n12p822-826.

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ABSTRACT The use of saline water and wastewater in agriculture has been increasingly considered, and this is due to the increase in awareness about the conservation of natural resources and population growth, implying a greater demand for food. Drip irrigation already has many benefits and, with the splitting of the depths to be applied, results in pulse drip irrigation, which further favors the plant by providing more constant moisture in the soil. The objective of this study was to evaluate the effects of the application of wastewater and saline water by pulse drip irrigation on eggplant yie

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von Westarp, Stefanie, Sietan Chieng, and Hans Schreier. "A comparison between low-cost drip irrigation, conventional drip irrigation, and hand watering in Nepal." Agricultural Water Management 64, no. 2 (2004): 143–60. http://dx.doi.org/10.1016/s0378-3774(03)00206-3.

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Blom, Theo J., and Brian D. Piott. "COMPARISON OF LOW VOLUME DRIP AND SUBIRRIGATION SYSTEMS." HortScience 25, no. 9 (1990): 1113e—1113. http://dx.doi.org/10.21273/hortsci.25.9.1113e.

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Low volume drip (2 l/h) was compared with 2 subirrigation ('trough' and `ebb and flo') systems for production of poinsettias and chrysanthemums in 15 cm diameter (1.6 l) `azalea' pots. Irrigation frequency as well as fertilizer rates were the same for all systems. The drip system received 280 ml per watering.Two plantings of poinsettias (fall) as well as two plantings of chrysanthemums (spring and summer) showed no differences in plant growth between the drip and the subirrigation systems. Water uptake by the medium was similar for all irrigation systems, but water and fertilizer application w

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