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tree is a moderately vigorous to vigorous cultivar. The growth suppressant prohexadione–calcium (PCa) (Apogee; BASF Corp., Agricultural Products Group, Research Triangle Park, NC) has demonstrated excellent shoot growth control in a number of apple

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, and internode length in ‘Wichita’ pecan ( Carya illinoinensis ) ( Graham and Storey, 2000 ) and ‘Cleopatra’ mandarin ( C. reticulata ) ( Wheaton, 1989 ) trees. ProCa (Regalis® and Apogee®; BASF, Ludwigshafen, Germany) is used on apple ( Malus

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inoculation, plants were moved, one at a time, to a measurement station located no more than 2 m from the growth area in the same greenhouse. The station ( Fig. 1 ) was equipped with a quantum sensor (model QSO; Apogee Instruments, Logan, UT) to measure

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with no baskets overhead. A quantum sensor (QSO; Apogee Instruments, Logan, UT) was secured outside on the peak of the greenhouse. The greenhouses contained no benches or plants. Two 3.3-ft line-quantum sensors (20 photodiodes per line, Apogee

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). Weather sensors installed include an anemometer (003001; R.M. Young, Traverse City, MI), a tipping bucket rain gauge (TE525, Campbell Scientific), a temperature/relative humidity probe (HMP50, Campbell Scientific), and a pyranometer (CS300; Apogee

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-covered greenhouse in Athens, GA, from 21 Oct. to 20 Dec. 2013. Greenhouse environmental conditions were measured using a quantum sensor for photosynthetic photon flux ( PPF ) (SQ-110; Apogee Instruments, Logan, UT) and a temperature and relative humidity sensor (HMP

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sensor four times at 90° (the base point directly facing the lamp) and dividing by two ( Frantz et al., 1998 ). The output of supplemental PPF was calibrated to be equivalent for both treatments using a line quantum meter (MQ-303; Apogee Instruments

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using a chlorophyll concentration meter (MC-100; Apogee Instruments, Logan, UT), both following the manufacturer’s instruction manuals. Experimental design and statistical analysis . Treatments were arranged in a randomized complete block design, with

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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

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, 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

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