19 Jul 2017
Yield, quality and profitability of sensor‑controlled irrigation: a case study of snapdragon (Antirrhinum majus L.) production
Saavoss, M., Belayneh, B., Lea‑Cox, J., Lichtenberg, E. (University of Maryland), Majsztrik, J. (Clemson University)
On-farm research has found a number of advantages of sensor-based irrigation compared to current irrigation practices including reduced water application, disease incidence, production time and labor, and increased profitability. We examined the effects of sensor-based irrigation in a commercial greenhouse producing cut-flower snapdragons. We calculated changes in yield, production time, quality, cost, revenue and profit, using 3 years of data before and after implementation of sensor irrigation networks. Sensor-based irrigation increased revenue by 62% and profit by 65% per year. Sensor-based irrigation was also associated with increases in the quality and the number of stems harvested per crop.
See the article in the link bellow
25 Apr 2017
A New Way to Measure Electrical Conductivity
John Lea-Cox (University of Maryland)
Electrical conductivity is vital to maintain adequate plant nutrition. Learn how to measure EC in subtrates with real-time output. Some imporant considerations are the sensor placement, and understanding the difference between bulk EC vs. pore water EC. See the article in the link bellow for an easy and cost-effective method for measuring EC.
1 May 2016
Pinpoint Toxicity in Your Pond Water
Fisher, P.R. (University of Florida)
A case study for a coastal Florida producer using pond water for irrigation. The pond water passed through a sand filter and chlorination treatment. The plants showed pitting and bronzing on the foliage and stunted growth. This article provides trouble shooting tips and tools used to calculate chlorination dosage.
Greenhouse Grower May 2016 (3754 KB)
1 Apr 2016
Using a Dehydrated Agar to Estimate Microbial Water Quality for Horticulture Irrigation
Meador, D.P. (Center for Applied Horticulture Research), Fisher, P.R., Guy, C.L., Harmon, P.F., Peres, N.A., and Teplitski, M. (University of Florida)
Petrifilms can be used as an onsite water quality tool to quantify bacteria density in irrigation water. High bacteria density can clog drip and mist emitters.
Journal of Environmental Quality 45(4) 2016