Abstract
A conceptual model of sweet cherry (Prunus avium L.) flower-bud deep supercooling during dormancy is presented. The extent of deep supercooling exhibited by the flower buds is expressed as the temperature of the median low-temperature exotherm (LTE50). The model calculates the LTE50 hourly, using air temperature, chill unit accumulation, and the previously calculated LTE50 in the decision pathways. An initial and updated LTE50 are determined experimentally by differential thermal analysis (DTA) in order to start the model at the beginning of the dormant season and to update it at periodic intervals. The model has been tested and validated. This model will overcome the delay in direct measurement and provide orchardists with a method of estimating critical flower-bud cold-hardiness temperatures for use in freeze-protection decisions.
Abstract
‘Sweet Red’ is a moist-type sweet potato [Ipomoea batatas (L.)] developed at North Carolina State Univ. in 1976. It was evaluated as NC727 in regional yield trials by the National Sweet Potato Collaborator Group in 1981 (observational test), 1982, and 1983 (advanced tests). The release of ‘Sweet Red’ provides the industry with a high-yielding, high-quality, red-skinned sweet potato.
randomized (some score sheets started with sample A, others on sample B or C, etc.), with which to rate the intensity of sweetness, sourness, and overall flavor on a 1 to 9 hedonic scale, where 1 was least sweet, sour, or flavorful and 9 was most sweet, sour
The sweet pea ( Lathyrus odoratus L.) was discovered in Sicily in 1695 ( Rice, 2002 ). Many cultivars have been bred in England and the United States since its introduction in England. Sweet pea cultivation is popular not only in the United
-quality cantaloupe with thick, sweet flesh, small (size 15) fruit and resistance to powdery and downy mildews. Line 1409 was derived from a cross of ‘Deltex’, an ananas-type melon, with ‘Caravelle’ and has intermediate resistance to MRRVD. The vines are extremely
Research Commission, Oregon Sweet Cherry Commission, and the Matching Investment Initiative program of Agriculture and Agri-Food Canada is greatly appreciated.
Rain-induced cracking severely limits production of many soft-textured, drupe, and berry fruits. Sweet cherry is a prominent example of the former ( Christensen, 1996 ). Cracking is commonly assumed to result from increased fruit turgor, caused by
; Teng et al., 2001 , 2002 ; Wünsche et al., 2005 ). In sweet cherry, reproductive and vegetative growth occurs simultaneously during spring and early summer ( Roper et al., 1987 ). FS and NFS leaf area (LA) is derived from preformed vegetative
Sweet corn ( Zea mays L.) production is important to the economy of Ontario where nearly 113,000 t of sweet corn are produced on nearly 10,000 ha annually [ Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA), 2013 ]. In 2012, sweet
values for vegetable crops such as sweet corn. To be relevant, the nutrient removal values must be based on current cultural practices and production technology. Although production guides often publish values for crop nutrient removal, the original