Download or read book Precision Agriculture 19 written by John V. Stafford and published by Brill Wageningen Academic. This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision agriculture is a reality in agriculture and is playing a key role as the industry comes to terms with the environment, market forces, quality requirements, traceability, vehicle guidance and crop management. These proceedings contain reviewed papers presented at the 12th European Conference on Precision Agriculture. The papers reflect the wide range of disciplines that impinge on precision agriculture - technology, crop science, soil science, agronomy, information technology, decision support, remote sensing and others.
Download or read book Precision Agriculture 21 written by John V. Stafford and published by Brill Wageningen Academic. This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision agriculture is a reality in agriculture and is playing a key role as the industry comes to terms with the environment, market forces, quality requirements, traceability, vehicle guidance and crop management. Research continues to be necessary, and needs to be reported and disseminated to a wide audience. These proceedings contain reviewed papers presented at the 13th European Conference on Precision Agriculture, held in Budapest, Hungary. The papers reflect the wide range of disciplines that impinge on precision agriculture - technology, crop science, soil science, agronomy, information technology, decision support, remote sensing and others. The broad range of research topics reported will be a valuable resource for researchers, advisors, teachers and professionals in agriculture long after the conference has finished.
Download or read book Variable Rate Irrigation No Longer Fiction written by M. C. Brouwer and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Application of Variable Rate Irrigation Techniques on Non uniform Soils Using Center pivot Irrigation Systems written by Andrew David Rackers and published by . This book was released on 2011 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable rate irrigation was studied for the production of corn and rice on a nonuniformsoil texture using a three tower, conventional, center-pivot irrigation system on the East Marsh Pivot (Marsh Pivot) at the University of Missouri Delta Research Center in Portageville, MO. The soil of the Marsh Pivot is of the Hayti-Portageville-Cooter association. Veris Technologies' Soil Electrical Conductivity (EC) System was used in 2002 to determine the sand content within the soil. The mean sand was calculated from the deep reading of the system because the EC from the deep reading had the better correlation with the calibration soil samples from the Marsh Pivot. Six irrigation treatments were used for corn irrigation in 2009 and 2010. In 2009, 15 mm was used to produce the maximum yield for corn, but in 2010 46 mm was used to produce the maximum yield for corn on the non-uniform soils. However, for both years 8 mm produced yields equal to or greater than all other irrigation treatments at the 95% confidence interval. Seven repetitions of six irrigation treatments were studied on the east half of the Marsh Pivot in 2010. The center-pivot irrigation system produced average yields greater than conventional flood irrigation (8970 kg-ha-1 vs 7040 kg-ha-1, Vories et al., 2002) while using less applied water for an application depth of at least 11 mm, (790 mm vs 1200-1600 mm)., Jehangir et al., 2004).
Download or read book Variable Rate Irrigation written by Miguel Jesus Jimenez-Berni and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture is the largest user of fresh water in the world. Therefore, any improvement in the efficiency of irrigation water use will result in cost reduction and the possibility of larger irrigated areas. This communication presents a precision irrigation system based on a wireless network of sensors and actuators in which a high level of control is achieved by means of valve automation. Water needs are calculated based on the crop characteristics, soil information, and the design of the irrigation system. Regional real-time weather data were obtained from the California Irrigation Management Information System (CIMIS). A new software system was developed to manage and control multiple valve groups according to different crops and strategies, and to make decisions on when and for how long to irrigate. The system was tested in almonds and walnuts where strategies based on evapotranspiration, stem water potential, and grower opinion were carried out. A total of 36 five-tree units were controlled with valves operated by the control software. Water use, yield, and nut quality were measured to analyze differences between the irrigation strategies. A cost/benefit analysis was also done using current water costs in different California agricultural regions. The use of this variable rate system to control irrigation based on evapotranspiration resulted in water savings of 1,776 m3/ha for almonds and 995 m3/ha for walnuts compared to normal grower control. Despite the reduction of water use, at current water costs these savings will not compensate for the differences in yield.
Download or read book Variable Rate Irrigation Future Or Fiction written by Judith M. Kaspersma and published by . This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variable Rate Application of Irrigation Water with Center Pivots written by William L. Kranz and published by . This book was released on 2014 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides information about the electronic controls and communication equipment that have been developed to allow center pivots to deliver irrigation water based on spatial production levels, soil texture, fertility, or field topography. Though the focus of this publication is center pivot irrigation systems, some of the information could also apply to sprinkler irrigation systems tha move in a straight line across the field. (Page 1)
Download or read book Characteristics of Fluidic Sprinkler Variable Rate Irrigation System written by Xingye Zhu and published by LAP Lambert Academic Publishing. This book was released on 2015-10-13 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sprinkler irrigation is one of the key technologies in the development of water-saving irrigation. New equipment is an important guarantee to popularize sprinkler irrigation. A complete fluidic sprinkler, a new type of water-saving product, was originally invented in China. This product depends on Coanda effect theory to accomplish the functions of direct spraying, stepping, and reversing. We own the intellectual property for this product and for several correlative patents. A series of complete fluidic sprinklers and other water-saving products have been developed by relying on several national major projects. Writing a professional book is necessary to introduce the key technology for these new products. Knowledge on the characteristics of fluidic sprinkler and variable-rate irrigation system will have high academic value and practical significance.
Download or read book Application of Variable rate Irrigation Technology to Conserve Water and Improve Crop Productivity written by Aghil Yari and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Variable-rate irrigation (VRI) is an emerging technology to optimize water and energy consumption, increase crop yields, and minimize environmental impacts. The goals of this research project were to assess the performance of VRI, to investigate field spatial and temporal variability for delineating irrigation management zones, and to quantify the potential water and energy savings, and crop productivity benefits of VRI for two crop types in southern Alberta. The research included a four-year field experiment during the 2013 to 2016 growing seasons at the Alberta Irrigation Technology Centre (AITC) in southern Alberta, Canada. In the 2013 and 2014 growing seasons, the experimental site was seeded to Hard Red Spring (HRS) wheat, and during the 2015 and 2016 growing seasons, Russet Burbank potato was planted. In 2013 and 2014, the performance of a center pivot irrigation system (CPIS) retrofitted with a commercial VRI package was assessed. Overall, the uniformity of application both along the system's lateral and in the travel direction were above 90% for the majority of the trials under the different wind speeds and water application depths. Wind speeds greater than 3.3 m s-1 reduced application uniformity by 3.9%. The volumetric flow measurement of the system indicated that up to 34% water savings can be achieved with VRI versus non-VRI. Moreover, the average energy cost decreased by 18% with VRI during the 2013 and 2014 seasons due to non-application of water to areas such as ponds, roads, and non-cropped areas in the study site. In an effort to delineate irrigation management zones for VRI application, temporal and spatial variation of soil physical and chemical properties were assessed. A stepwise multivariate regression approach and a fuzzy C-mean clustering algorithm were used to identify optimum number of variables for management zone delineation. It was found that soil electrical conductivity (EC), pH, and field elevation were the best of 10 parameters for management zone delineation. The validity criteria identified that the three management zones were optimum for the study site. Statistical analyses showed that the delineated management zones were significantly different in terms of crop yields. In the 2014 growing season, the highest wheat yield (4.80 t ha-1) was produced within the management zone three where the EC value was low and elevation was high. The lowest wheat yield (2.22 t ha-1) was in the management zone one situated in the high EC and low elevation areas. The AquaCrop model was used to optimize crop productivity within the three management zones. Simulation of HRS wheat growth in the study area under the different irrigation scenarios indicated that the crop yield would be improved with optimum irrigation application and drainage management.The study also has investigated the potato productivity under VRI technology in 2015 and 2016 growing seasons. Three irrigation applications (high, normal, and low irrigation treatments) were applied to Russet Burbank potatoes. In 2015, higher water application in the experimental plots resulted in no significant improvement to potato yield. The harvest of tubers in normal irrigation plots proved to be more uniform in quality and size of tubers. In 2016, there were no significant differences among irrigation treatments for any of the yield and quality factors analyzed." --
Download or read book Integrating Remote Sensing Data Into Fuzzy Control System for Variable Rate Irrigation Estimates written by Willians Ribeiro Mendes and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable rate irrigation (VRI) is the capacity to vary the depth of water application in a field spatially. Developing precise management zones is necessary to efficient variable rate irrigation technologies. Intelligent fuzzy inference system based on precision irrigation knowledge, i.e., a system capable of creating prescriptive maps to control the rotation speed of the central pivot. Based on the VRI-prescribed map created by the intelligent system of decision-making, the pivot can increase or decrease its speed, reaching the desired depth of application in a certain irrigation zone. Therefore, this strategy of speed control is more realistic compared to traditional methods. Results indicate that data from the edaphoclimatic variables, when well fitted to the fuzzy logic, can solve uncertainties and non-linearities of an irrigation system and establish a control model for high-precision irrigation. Because remote sensing provides quick measurements and easy access to crop information for large irrigation areas, images will be used as inputs. The developed fuzzy system for pivot control is original and innovative. Furthermore, the artificial intelligent systems can be applied widely in agricultural areas, so the results were favorable to the continuity of studies on precision irrigation and application of the fuzzy logic in precision agriculture.
Download or read book Irrigation System Selection in an Energy short Economy written by Verel W. Benson and published by . This book was released on 1981 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Potential Water Pump Reductions Based on Soil Water Content Geospatial Data Layers and Variable Rate Irrigation VRI Pivot Control Resolution written by Keith A. Miller and published by . This book was released on 2015 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing concern for sustainable water use has the agriculture industry working toward higher efficiency use of irrigation water. The average irrigation water use efficiency throughout the United States is 45%, which is extremely poor. Advancements in crop management have continued to allow producers to know more about the conditions in their field from nutrient management and pest control, to understanding yield spatially. Recent mechanical advancements have improved the capabilities of center pivot irrigation systems to water various depths throughout the field. This technology is known as variable rate irrigation (VRI). With VRI comes a whole new strategy for irrigation. Advancements in remote and mobile sensing have played a major role in collecting data spatially throughout a field in order to aid in the management of VRI. The goal of this study was to provide a method for potential VRI technology adopters to evaluate potential water savings using datasets collected with varying levels of complexity. The proposed method was based on estimating root zone water holding capacity (RZWHC) spatially across two case study fields and treating each with URI and both sector and zone-controlled VRI.
Download or read book Development of a Variable Rate Linear Move Irrigation System for Cotton in Coastal Plain Soils written by Sam D. Moore and published by . This book was released on 2005 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Economic Feasibility of Variable Rate Irrigation Technology for Wetland Restoration written by Karina Schoengold and published by . This book was released on 2019 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this NebGuide is to evaluate the economic feasibility of installing variable rate irrigation with a cost-share program when restoring wetlands on previously cropped land. (Page 1)
Download or read book Irrigation and Drainage Engineering written by Peter Waller and published by Springer. This book was released on 2015-11-18 with total page 747 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook focuses specifically on the combined topics of irrigation and drainage engineering. It emphasizes both basic concepts and practical applications of the latest technologies available. The design of irrigation, pumping, and drainage systems using Excel and Visual Basic for Applications programs are explained for both graduate and undergraduate students and practicing engineers. The book emphasizes environmental protection, economics, and engineering design processes. It includes detailed chapters on irrigation economics, soils, reference evapotranspiration, crop evapotranspiration, pipe flow, pumps, open-channel flow, groundwater, center pivots, turf and landscape, drip, orchards, wheel lines, hand lines, surfaces, greenhouse hydroponics, soil water movement, drainage systems design, drainage and wetlands contaminant fate and transport. It contains summaries, homework problems, and color photos. The book draws from the fields of fluid mechanics, soil physics, hydrology, soil chemistry, economics, and plant sciences to present a broad interdisciplinary view of the fundamental concepts in irrigation and drainage systems design.
Download or read book Quantification of Variable Rate Irrigation Benefits and Spatial Variability in Root Zone Water Holding Capacity written by Tsz Him Lo and published by . This book was released on 2015 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable rate irrigation (VRI) investment decisions require field-specific knowledge of benefits. The objective of this research was to help producers and consultants consider and quantify potential benefits of VRI. First, a conceptual model was developed for evaluating the public and/or private gain from adopting VRI where irrigation water supply is non-restrictive. Potential benefits were classified into three categories and were attributed to ten reasons. In the Central Plains at current prices, a small improvement in corn (maize) yield would make a large contribution to VRI profitability. Second, the potential irrigation withdrawal reduction from adapting VRI to spatial heterogeneity of root zone water holding capacity (R)—one particular benefit of VRI—was estimated for 49,224 center pivot irrigated fields in Nebraska. On each of these fields, the amount of R that is unutilized by conventional irrigation but can be mined annually by VRI was calculated from the statewide gridded Soil Survey Geographic database (gSSURGO). Over 51 mm of potential withdrawal reduction from this application of VRI was found on 2% of the analyzed fields. Third, based on field research, a method of conducting a field characterization of R was recommended for refining estimates of those withdrawal reductions and for informing VRI management. Field capacity (FC) was observationally determined by measuring in-situ soil water content after the wet soil has had time to drain following substantial precipitation, and R was spatially predicted by regression with a densely known auxiliary variable. As compared with FC values computed from gSSURGO and pedotransfer function outputs, FC values computed according to the observational method were more effective in accounting for observed soil moisture patterns at the study site. The field characterization of R, therefore, may be advantageous on fields where the expected profit from mining unutilized R with VRI exceeds the cost of characterization. Future research should present field demonstrations of VRI profitability, provide guidance on VRI management, and produce transferable methods for and field-specific results of quantifying VRI benefits.
Download or read book Coping with Water Scarcity written by Luis Santos Pereira and published by Springer Science & Business Media. This book was released on 2009-03-22 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main problems confronting the world of the 21st Century is a shortage of water. There is already severe scarcity in many regions of the world, causing tremendous problems for local populations and indeed entire societies. There is insufficient water available for the production of food to alleviate poverty and starvation; the lack of water hampers industrial, urban and tourism development, forcing restrictions on other sectors, especially agriculture; health problems arise as the deterioration of ground and surface waters favours water-borne diseases, which flourish in the absence of decent water distribution and sewerage systems. Water conflicts still arise in areas under stress, while water for nature has become a vanishing priority in such zones. This book is a guide to the establishment of regional and/or local guidelines for developing and implementing new ideas for coping with water scarcity. The basic premise underlying the book is that water scarcity will persist, so personal, human and society-wide skills will be needed to cope with it while living in harmony with the necessary environmental constraints. The book provides basic information to assist decision makers, water managers, engineers, agronomists, social scientists and other professions (and their students) in formulating coherent, hopefully harmonious and consolidated views on the issue. Guidelines are also given for introducing the general public to the concept of water scarcity and how to deal with it.
