Mathematical modeling has been used to describe the characteristics of crop growth. Establishing a growth model can help better understand responses crops their environment and improve efficiency agricultural production. This study establishes empirical models predict greenhouse tomato. In this study, we collected beef tomato (Solanum lycopersicum cv. ‘993?) data over two seasons in Taiwan esta...

in this research, the statistics of daily temperature of meteorology stations for estimating the probable occurrence of the first and last frost temperature, the phonological thresholds of saffron and its flowering and irrigation dates were explored. furthermore, by applying different methods, the probabilities of the attained dates in different probability levels were fit in smada software. th...

Heat units, expressed in growing degree-days (GDD), are frequently used to describe the timing of biological processes. The basic equation used is GDD = [(T,,, + TM,,)/2] T,,,,, where T, and T,,, are daily maximum and minimum air temperature, respectively, and T,, is the base temperature. Two methods of interpreting this equation for calculating GDD are: (1) if the daily mean temperature is les...

Identifying the growth stages on oilseed rape accurately is essential for effective crop management. Two commonly used methods identifying are growing degree days (GDD) and BBCH scale, by measuring heat accumulation daily temperatures describes of plants. The main goal this research using a combination these methods, where can identify in production period. three-year field experiments 2015/16 ...

This study aims to evaluate the correlation among growing degree-days (GDD), canopy height (CH), and leaf area index (LAI) for Guinea grass irrigated, considering different combinations of nitrogen boron rates cycles regrowth. The experiment was carried out from August/2017 August/2018 in a field experiment, climate region is classified as subtropical. A randomized block design arranged factori...

In recent years, North-western Spain has experienced an increase in the cultivated area of olive trees. The main propitious areas for groves are Miño and Sil basins, as a consequence their Oceanic climate with Mediterranean influence. objective this study is to determine characteristics reproductive biology, phenological aerobiological behaviour trees most northerly new plantation Iberian Penin...

In this study, we analyzed the relationship between days after planting or growing degree (GDD) and number of labor hours spent on stem training, pruning, harvesting sweet pepper cultivated in commercial glass greenhouses. A model was developed for estimating according to plant height. three large-scale (>1 ha) greenhouse sites (1, 2, 3), weekly growth height, fruit, yield were measured manuall...