Abstract
We have tried to develop the guidance system for farmers to cultivate using various phenological indices. As the sensing part of this system, we deployed a new Wireless Sensor Network (WSN). This system uses the 920 MHz radio wave based on the Wireless Smart Utility Network that enables long-range wireless communication. In addition, the data acquired by the WSN were standardized for the advanced web service interoperability. By using these standardized data, we can create a web service that offers various kinds of phenological indices as secondary information to the farmers in the field. We have also established the field management system using thermal image, fluorescent and X-ray fluorescent methods, which enable the nondestructive, chemical-free, simple, and rapid measurement of fruits or trees. We can get the information about the transpiration of plants through a thermal image. The fluorescence sensor gives us information, such as nitrate balance index (NBI), that shows the nitrate balance inside the leaf, chlorophyll content, flavonol content and anthocyanin content. These methods allow one to quickly check the health of trees and find ways to improve the tree vigor of weak ones. Furthermore, the fluorescent x-ray sensor has the possibility to quantify the loss of minerals necessary for fruit growth.
Highlights
Agricultural plants are extremely sensitive to climate change
This paper focuses on the vigor measurement of mandarin orange leaves by using thermal images, fluorescence and fluorescence X-ray methods in the field
Growing Environment Data Acquired by the Wireless Sensor Network (WSN)
Summary
Agricultural plants are extremely sensitive to climate change. Changes in precipitation patterns increase the likelihood of short-run crop failures and long-run production declines. The necessity of support of cultivation has been increasing with the escalation of issues such as the decrease in the number of people engaged in agriculture and the aging of this population. The development of science-based agriculture is desired in order to adapt to the changing climate and to promote environmentally friendly smart agriculture with energy saving strategies. Two kinds of measurements are indispensable; the first one is establishing a periodic acquisition system of meteorological and soil information at the field and creating cultivation indices by using this information; the second one is establishing the method for examining the tree vigor or balance of nutrition contents in the plant
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