Search Results

You are looking at 1 - 10 of 162 items for :

  • "horticulture" x
  • Materials and Applied Sciences x
  • Refine by Access: All Content x
Clear All

In the case of organic production the quality assessment of the fruits and vegetables is especially important. Monitoring of the maturation and ripening process, early detection of diseases, decision about harvest date and postharvest treatment need reliable, objective and – preferably – non-destructive quality testing methods. Dynamic hardness or stiffness measurement methods (resonance, impact, wave propagation) offer very useful tools in this field, but with strong limitations in applicability area and/or physical interpretation of the measured parameters. Our objective was to develop method and appropriate portable instrumentation to measure surface hardness – as quality measure – with a nondestructive method.

The computer controlled instrument has an electromagnetically excited impactor fitted with a piezoelectric acceleration sensor, a signal conditioner and A/D converter. To ensure the uniform contact behavior (contact area) between the impactor and the tested produce of wide range of shape, spherical head was applied. Conclusively, Hertz contact theory is to be applied for evaluation of the impact signal. Instead of using empirical “hardness index” – as in the case of several existing instruments – our objective was the physical interpretation of the contact phenomena. The measured acceleration signal was mathematically processed to calculate real physical parameters (force, speed, deformation), and to characterize the process similarly to the widely used texture analyzers, penetrometers. A new hardness parameter – “dynamic elastic modulus” – was introduced. According to the methodological investigations, the measurement was found to be perfectly non-destructive for a wide range of products. Conclusively, the developed method offers a useful tool for quality evaluation of organic horticultural products.

Restricted access

.1.01/0.0/0.0/16_017/0002334). This study was funded by the Internal Grant Agency, Faculty of Horticulture, Mendel University in Brno (IGA-ZF/2020-DP005). References Apak

Open access

). Effect of grafting eggplant ( Solanum melongena L.) on its selected useful characters . Bulletin UASVM Horticulture , 72 ( 2 ): 318 – 326 . Bie , Z. , Azher Nawaz , M. , Huang , Y. , Lee , J.-M. and Colla , G. ( 2017 ). Importance and use

Open access

, P. (2007): Hazai cickafark ( Achillea spp.) populációk drogminőségének vizsgálata. (Evaluation of the quality of drugs from Hungarian yarrow populations.) Kertgazdaság - Horticulture , 39 (1), 53

Restricted access

on the fruit shape; and Fekete et al. (2018) in their studies found that growing technology could influence fruit quality. Nowadays, in horticulture, quality is becoming a leading attribute over quantity ( Schnitzler and Gruda , 2003 ). From the

Open access

.A. , Syukur , M. , Melati , M. , and Guntoro , D. ( 2016 ). Selection of shade-tolerant tomato genotypes . Journal of Applied Horticulture , 18 ( 2 ): 154 – 159 . https://doi.org/10.37855/jah.2016.v18i02.27 . Sun , G. , Ding , Y. , Wang , X

Open access
Progress in Agricultural Engineering Sciences
Authors:
Mai Sao Dam
,
Vuong Duc Nguyen
,
Tamás Zsom
,
Lien Le Phuong Nguyen
, and
Géza Hitka

to meet consumers' demand is necessary. Most of horticultural produce are not consumed immediately after harvest. In supply chain, ethylene-sensitive and ethylene-producing commodities are usually stored together. The high ethylene concentration in

Open access

an important trait. Our next goal is to adopt further image analysis software already involved in the characterization of horticultural crops and describe large numbers of grapevine cultivars based on the size and shape attributes of the berry

Open access
Acta Alimentaria
Authors:
N. Kellner
,
E. Antal
,
A. Szabó
, and
R. Matolcsi

.J. ( 1985 ). Resistance of various classes of grape to the bunch and muscadine grape forms of black rot . Journal of the American Society for Horticultural Science , 110 ( 6 ): 762

Open access
Progress in Agricultural Engineering Sciences
Authors:
E. Somogyi
,
Á. Kun
,
J. Lázár
,
P. Bodor-Pesti
, and
D. Á. Nyitrainé Sárdy

horticultural crops where appearance, for example bunch size and compactness, berry size, shape and colour highly influence the table grape consumers' decision. Description of the berry size already appeared in literature in the 16 th century. Szikszai (1590

Open access