Evaluation of relevant sprayer parameters for use with precision irrigation in landscape

• Published in: Advances in animal biosciences Vol. 8; no. 2; pp. 865 - 869
• Main Authors: Shahidian, S., Serrano, J. M. R., Hakimi, R.
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.07.2017
• Subjects: Agri-engineering; Agricultural management; Agriculture; Arc spraying; Colleges & universities; Efficiency; Engineering; Irrigation; irrigation management; irrigation systems; Laboratories; landscapes; Nozzles; Parameter estimation; Performance evaluation; Precision agriculture; Rain; Spatial distribution; sprayers; Sprays; Systems design; Uniformity coefficient; Water conservation; Water management; Water shortages; uniformity; irrigation efficiency; sprayer nozzles
• ISSN: 2040-4700; 2040-4719; 2040-4719
• DOI: 10.1017/S2040470017000760

The purpose of this work was to evaluate the capacity of existing landscape irrigation equipment to deliver the expected irrigation depth at a level of uniformity that can potentially be used in a precision irrigation management environment. Popular pop-up sprayer systems from two leading manufacturers (Rain-bird and Hunter variable arc and fixed arc nozzles) were subject to spatial distribution tests, in order to establish the application patterns under ideal conditions. The results indicate that it is not possible to fully rely on the catalog application depth values, with some variable arc nozzles applying up to 200% of the catalog values. These nozzles can have low values of uniformity, with Christiansen´s uniformity coefficient, CU, of between 0.31 and 0.70, making it difficult to obtain good uniformity even under a back-to-back setting. These results indicate that variable arc nozzles are not recommended for use in precision agriculture. It is preferable to use fixed arc nozzles, after actual field evaluation.