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PREDICTING FLOWERING OF APRICOT CULTIVARS USING GROWING DEGREE DAYS
Acta Horticulturae, 2012Heat requirement for flowering in apricot cultivars was estimated from field data using Growing Degree Days method (GDD). Ten years of phenological and temperature data for 42 apricot cultivars of diverse geographical origin and different flowering time, grown in Belgrade region, were used to conduct the study. Base temperatures for different cultivars
Ruml, Mirjana +2 more
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Theoretical and Applied Climatology, 2012
The growth and development of crops is commonly regarded as a function of time alone. However, this approach can be inadequate due to temperatures which vary from year to year caused by global climate change. This prompted the development of the growing degree day concept, which incorporates information on both the passage of time and the temperature ...
Lijun Su, Quanjiu Wang, Yungang Bai
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The growth and development of crops is commonly regarded as a function of time alone. However, this approach can be inadequate due to temperatures which vary from year to year caused by global climate change. This prompted the development of the growing degree day concept, which incorporates information on both the passage of time and the temperature ...
Lijun Su, Quanjiu Wang, Yungang Bai
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Growing Degree Days to Forecast Crop Stages
2017Plant development depends on temperature. Plants require a specific amount of heat to develop from one point in their life-cycle to another. The ability to predict a specific crop stage, relative to insect and weed cycles, permits better management.
Latief Ahmad +3 more
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Morphological Development of Alfalfa as a function of Growing Degree Days
Journal of Production Agriculture, 1994Growing degree days (GDD, base = 41 °F) may be useful for estimating alfalfa (Medicago sativa L.) morphological development (mean stage by weight, MSW) as a forage management tool. Our objective was to quantify the relationship between MSW and GDD of alfalfa in several environments and years.
Matt A. Sanderson +2 more
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DETERMINATION OF A SUITABLE FORMULA FOR THE CALCULATION OF SUM GROWING DEGREE DAYS IN CUCUMBER
Acta Horticulturae, 1999This study was conducted to determine the most suitable formula to calculate Sum Growing Degree Days (SGDD) in Cucumber for the periods between sowing and emergence, emergence and anthesis, anthesis and maturation, sowing and first harvest periods. In a two year trial, six cultivars were grown, starting from different sowing dates, and 96 equations ...
Akinci S., Abak K.
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Growing degree-days for the ‘Niagara Rosada’ grapevine pruned in different seasons
International Journal of Biometeorology, 2011Plant growth and development are proportional to biological time, or the thermal time of the species, which can be defined as the integral of the temperature over time between the lower and upper temperature developmental thresholds. The objective of this study was to investigate the efficiency of the growing degree-day (GDD) approach for vines of the '
Fábio Vale, Scarpare +4 more
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Mathematical formulae for calculating the base temperature for growing degree days
Agricultural and Forest Meteorology, 1995Much research has been done on finding methods to determine the base temperature, a very important variable in computation of growing degree days (GDD). Four common methods have been reported often in the literature: (1) the least standard deviation in growing degree days; (2) the least standard deviation in days; (3) coefficient of variation; (4 ...
Senshan Yang +2 more
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Evapotranspiration Crop Coefficients Predicted Using Growing-Degree-Days
Transactions of the ASAE, 1985ABSTRACT MONTHLY evapotranspiration (Et) of alfalfa (Medicago sativa L.), cotton (Gossypium hirsutum L.), corn (Zea mays L.), and sorghum (Sorghum bicolor (L) Moench) was measured in nonweighing lysimeters for various years and locations in New Mexico to evaluate the effects of various climatic conditions.
null T. W. Sammis +4 more
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Spatial Distribution of Soil Heat Flux and Growing Degree Days
Soil Science Society of America Journal, 1991Abstract In agricultural areas, groundwater pollution by NO 2‐ 3 from excessive fertilizer, manure, and amendment applications is becoming a serious problem.
J. K. Wolf, A. S. Rogowski
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RELATIONSHIP BETWEEN PERCENTAGE EMERGENCE AND GROWING DEGREE DAYS FOR CORN
Canadian Journal of Soil Science, 1990Seed bed temperature is often the limiting environmental factor affecting corn (Zea mays L.) emergence, particularly in short-season production areas or when conservation tillage practices are employed. In this study, observations of the percentage emergence and seed bed growing degree days (base 10 °C) are used to assess functions which model the ...
H. N. HAYHOE, L. M. DWYER
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