28_3_4_27_28.pdf
An automatic device for watering at the right time and in the right amount.
Download this file:
![PDF document PDF document](https://rngr.net/pdf.png)
Details
Author(s): Gerland A. Walters
Publication: Tree Planters' Notes - Volume 28, Number 3 (1977)
Section: General
Volume: 28
Number: 3