Results 261 to 270 of about 1,053,060 (317)
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2014
This chapter addresses the problem of greenhouse crop growth control using a hierarchical control approach. The proposed control scheme consists of two layers. In the lower one, any of the controllers described in Chap. 3 are used. The upper layer calculates optimal climate setpoints based on different criteria.
Francisco Rodríguez +3 more
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This chapter addresses the problem of greenhouse crop growth control using a hierarchical control approach. The proposed control scheme consists of two layers. In the lower one, any of the controllers described in Chap. 3 are used. The upper layer calculates optimal climate setpoints based on different criteria.
Francisco Rodríguez +3 more
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MODELLING FOR CROP GROWTH CONTROL
Acta Horticulturae, 1989In relation to the control of crop growth it is necessary to consider the aspect of time constants. Some growth characteristics, such as photosynthesis and transpiration have a rapid response to control actions, whereas other characteristics, such as development and morphogenesis show a much slower response.
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Growth Regulators and Crop Productivity
2021During the 1940s a number of new synthetic auxins, including the chlorophenoxy acetic acids, 2,4-D and 2,4,5-T, were produced and found commercial application, particularly as herbicides. Discovery of the gibberellins and cytokinins followed in the next decade.
Peter Hedden, Gordon Victor Hoad
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2016
Growth of crops, plants or plant parts is defined as the irreversible increase in size whereas development is the continuous change in plant form and function with characteristic transition phases. Growth is primarily associated with capture and allocation of resources whereas development is mostly related to non-resource environmental cues such as ...
Victor O. Sadras +2 more
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Growth of crops, plants or plant parts is defined as the irreversible increase in size whereas development is the continuous change in plant form and function with characteristic transition phases. Growth is primarily associated with capture and allocation of resources whereas development is mostly related to non-resource environmental cues such as ...
Victor O. Sadras +2 more
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Growth stages of Brassica crops for crop protection purposes
Scientia Horticulturae, 1984Abstract Growth stages of 8 Brassica vegetable crops are described. The crops are Brussels sprouts, white cabbage, spring cabbage, savoy cabbage, cauliflower, kale, broccoli and kohlrabi. The descriptions given are for use in the field, to distinguish between the various growth stages.
J. Theunissen, A. Sins
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Nitrogen, Plant Growth and Crop Yield
2001The use of fertilisers in agriculture and horticulture is the key to production of sufficient food (including the fodder for animals) to maintain the global human population (currently 6 billion; Evans 1998) and to permit its continued rapid growth to the expected 10 or even 12 billion (Bumb 1995).
Lawlor, D.W. +2 more
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Crop environment, plant growth and physiology.
2003Ce chapitre traite des facteurs de l'environnement en culture d'ananas, de la croissance et de la physiologie de cette plante : assimilation du carbone et utilisation de l'eau (fixation du carbone via la voie phtotosynthétique CAM, efficience d'utilisation de l'eau liée au mécanisme CAM de l'ananas, effets des facteurs de l'environnement), croissance ...
Malézieux, E. +2 more
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Crop Growth Simulation Modeling
2014Agricultural crops include various plant species grown on the farm for food and fiber. Increase in the world population demands increase in the agricultural production as well as efficient management of resources in the form of precision agriculture through crop growth models to facilitate measured amounts of inputs to obtain desired quantity and ...
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Soil Heterogeneity and Crop Growth
2010Producers around the world are considering the use of precision agriculture technologies. One of the key factors encouraging this development is the spatially varying performance of agricultural crops. In many instances, yield variability can be associated with differences in soil attributes across agricultural fields.
Viacheslav I. Adamchuk +2 more
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Growth regulation in vegetable crops
Outlook on Agriculture, 1976Vegetables are more important as a world food source than consideration solely of the area under cultivation would imply. Yet, although they are generally high-value crops the variety of plant species and cultural conditions embraced limits each one's economic potential for the use of new synthetic growth regulators.
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