MOBILE APPLICATION FOR ADJUSTING AIR-BLAST SPRAYERS IN COFFEE PLANTATION

ABSTRACT Mobile application development advances, particularly for smartphones and tablets, have allowed farmers to make decisions more assertively in their agrobusiness management. This article addresses the development and evaluation of an app aimed at people who deal with the pesticide application technology in coffee farming, more specifically, adjustment and calibration of sprayers. This mobile app provides the main data necessary for a correct calibration of air-blast sprayers to apply pesticides in coffee planting. Its functionalities include calculation of the application rate for each situation (L ha-1) based on data obtained in the field, such as canopy volume. The app, called SprayCafé, was developed for the Android platform using the Java programming language in the integrated development environment Android Studio. After the development, the application was evaluated, based on a questionnaire answered by 139 users, who ranked the following requirements: ease of use, loading time, adequacy of screen resolution, data relevance, sequence of information, and applicability, among others. The system proved to be simple and robust; it was thus assessed as adequate to the field and to be of great value for coffee planting, especially because it allows safer and more adequate pesticide application. The graphical user interface is interactive and easy to use.【摘要】移动应用开发技术的进步，尤其是面向智能手机与平板电脑的移动端应用研发，已使农业从业者能够在农业经营管理中更果断地做出决策。本文聚焦咖啡种植中的农药喷施作业场景，开发了一款名为SprayCafé的移动应用，面向咖啡种植植保作业相关从业者，用于辅助风送式喷雾机的调试与校准，实现农药精准喷施。 该应用可为风送式喷雾机的正确校准提供必要数据，核心功能包括基于田间实测数据（如冠层体积）计算不同场景下的农药喷施量（单位：升/公顷，L·ha⁻¹）。本应用基于Android平台开发，采用Java编程语言，集成开发环境为Android Studio。 开发完成后，研究团队邀请139名用户通过问卷对该应用进行评估，用户需对易用性、加载时长、屏幕分辨率适配性、数据相关性、信息排版顺序以及实际适用性等维度进行评分。评估结果显示，该系统简洁且稳定性强，完全适配田间作业需求，对咖啡种植具有极高应用价值，尤其可实现更安全、更规范的农药喷施作业。该应用的图形用户界面具备交互性，操作简便易用。