Life Sciences Commons^™

Greenhouse Production And Marketing Of Petunia, W. Theron Hansen Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was performed during a three year period, 1969-1971. The first year the writer evaluated containers, soil mixtures, planting dates, fertilizers, and temperatures for optimum petunia production. The data collected aided in selecting the best greenhouse procedures for future studies. The second year three bedding plant varieties were used for further evaluate containers and soil mixtures using direct seeding and transplanting and watering continuously or watering as needed.

As a result of the first two year's studies, a liquid fertilizer (10-5-5), an average temperature of 75 F, Jiffy-7 peat pellets, plants not receiving continuous water program was used for …

Simulation Of The Daily Growth Of An Aspen Population From The Measured Co2-Exchange Rates Of The Components, G.C. Bate, D.T. Canvin

Aspen Bibliography

The daily total CO₂-exchange of an aspen population (32 trees) was measured using a growth chamber gas analysis system which had been shown to measure accurately the actual carbon gain of the population. The CO₂-exchange rates of the components (e.g. roots, stems, leaves) were measured in the light and dark and these rates were used to calculate the total CO₂-exchange of the population using a computer model. The carbon gain during the photoperiod was underestimated by 25% in the simulation while the carbon loss during the nyctoperiod was overestimated 100% by the simulation.