亚洲最大福利网站_4hu四虎永久网址_麻豆国产原创_国产成人av一区二区

U.S. stevia company testing drones
date:Apr 25, 2014
Stevia First Corp. is planning a field-scale study using agricultural drones. The practice potentially may help U.S. growers make stevia a more economically-viable crop, according to Stevia First, which wants to establish a vertically integrated stevia enterprise in the United States.

The agricultural drones are used to interrupt a photoperiod. Brief overnight illumination involves red LED light on the stevia plants and may stimulate growth and plant flowering, which then increase leaf mass and

12/24 08:05