ISHS Acta Horticulturae 491: International Symposium Greenhouse Management for Better Yield & Quality in Mild Winter Climates
DECISIONS AND RISK FOR HYDROPONIC GREENHOUSE TOMATO PRODUCTION |
| Authors: | T.H. Short, A. El-Attal, H.M. Keener |
| Keywords: | Decision Analysis, controlled environment agriculture, greenhouse systems |
| Abstract:
A decision model for hydroponic tomato production (HYTODMOD) was developed for achieving high yield, high quality fruit. The model was based on five key tests during each of five growth stages. The five growth stages were germination and early growth, seedling, vegetative, early fruiting and mature fruiting. The five key tests included hydrogen ion concentration of the feeding solution, electrical conductivity of the feeding solution, root temperature, greenhouse air temperature. and air relative humidity. Ranges of risk for the five tests were developed and utility theory was used to prioritize actions needed to correct high risk test levels. HYTODMOD was validated by comparing the model recommendations with four experts who were each given 25 hypothetical and random production situations. | |
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