Search Results

You are looking at 101 - 110 of 297 items for :

Clear All

μmol·m −2 ·s −1 as measured at bench level with a quantum light meter (1078 QMSW; Apogee Instruments, Logan, UT). Measurements. Data were collected daily for vase life (duration from placement of stems in vases in the postharvest evaluation room to the

Full access

, and line quantum sensors (Apogee Instruments, Logan, UT) measured the instantaneous light intensity every 10 s. A data logger (CR10; Campbell Scientific, Logan, UT) recorded hourly means of both temperature and light intensity. The actual mean

Full access

) mounted above the shade structures from 0800 to 2000 hr . Light levels were monitored in each experimental unit using quantum sensors (model QSO-S; Apogee Instruments, Logan, UT) connected to a data logger (CR10X; Campbell Scientific, Logan, UT). The data

Full access

in an aspirated radiation shield. Light at the canopy level was measured across the greenhouse every 10 min with a SQ-500 quantum sensor (Apogee Instruments, Logan, UT). Sensors were monitored and recorded by a CR1000X data logger (Campbell Scientific

Open Access

under LD conditions by supplementing the natural daylight (around 11 h) with white light-emitting diode lights supplying 70 µmol·m –1 ·s –1 photosynthetic photon flux, measured using a handheld quantum meter (Apogee Instruments, Logan, UT). After 3

Open Access

PPF of 25 to 50 μmol·m −2 ·s −1 at plant height [as measured with a line quantum sensor (Apogee Instruments, Logan, Utah)]. Plants were irrigated as necessary with reverse osmosis water supplemented with a water-soluble fertilizer at each irrigation

Full access

. Cool white fluorescent lights [Twister Mini 23 W (100-W) bulbs; Phillips Lighting North American Corp., Somerset, NJ] were placed on the counter to provide 96 µmol·m −2 ·s −1 of supplemental light (Quantum Meter; Apogee Instruments, Logan, UT) for 12 h

Open Access

end of the 2016 and 2017 seasons. At the completion of the study in 2019, a spectroradiometer (PS-300; Apogee Instruments, Logan, UT) was used to calculate the percent transmission. Transmission profiles were recorded within 1 h of solar noon on a

Open Access

, IL). The average greenhouse air temperature and relative humidity throughout the 58-d duration of the experiment were 22.2 ± 3.5 °C and 69.3 ± 2.3%, respectively. Under each shade structure, full-spectrum quantum sensors (SS-500; Apogee Instruments

Open Access

needed. Degradation of rice hulls. One-liter glass jars filled with peat-based media were watered with tap water or a nutrient solution to quantify microbial activity. Each jar was equipped with a galvanic cell oxygen sensor (SO-110; Apogee

Open Access