Results 21 to 30 of about 39,766 (263)

Evaluation of SPAD Index for Estimating Nitrogen and Magnesium Contents in Three Blueberry Varieties (Vaccinium corymbosum L.) on the Andean Tropics

open access: yesHorticulturae, 2023
In the Ericaceae family, blueberries are the most commercially important species. Estimating the nutritional and physiological status of plants is a common practice carried out by producers.
Elberth Hernando Pinzón-Sandoval   +2 more
doaj   +1 more source

Yield and Quality of Sesame (Sesamum indicum L.) Improve by Water Preservative Materials under Normal and Deficit Irrigation in Birjand [PDF]

open access: yesAgrotechniques in Industrial Crops, 2023
Crop production in dry areas is strongly affected by water shortage. In these regions, the application of water-absorbent materials is a useful strategy for sustainable crop production.
Abbas KhasheiSiuki   +4 more
doaj   +1 more source

The potential of the MERIS Terrestrial Chlorophyll Index for carbon flux estimation [PDF]

open access: yesRemote Sensing of Environment, 2010
In this study we evaluated the potential of the Medium Resolution Imaging Spectrometer (MERIS) Terrestrial Chlorophyll Index (MTCI) for monitoring gross primary productivity (GPP) across fifteen eddy covariance towers encompassing a wide variation in North American vegetation composition.
Harris, A., Dash, J.
openaire   +3 more sources

The Effect of Biochar and Humic Acid Rates on some Phophysiological Characteristics and Grain Yield SC704 Corn (Zea mays L.) Hybrid Under Water Deficit stress [PDF]

open access: yesIkufīziyuluzhī-i Giyāhān-i Zirā̒ī, 2021
To evaluate the effect of different rates of biochar and humic acid applications on physiological characteristics and grain yield of single cross 704 hybrid corn under water deficit stress, a split split plot experiment based on a randomized complete ...
Armaghan Charkhab   +4 more
doaj   +1 more source

SURFACE CHLOROPHYLL AS AN INDEX OF THE DEPTH, CHLOROPHYLL CONTENT, AND PRIMARY PRODUCTIVITY OF THE EUPHOTIC LAYER1 [PDF]

open access: yesLimnology and Oceanography, 1970
The statistical relationships between surface chlorophyll concentration and the depth, chlorophyll content, and primary productivity of the euphotic layer have been investigated. They all proved to be statistically significant.
openaire   +1 more source

Evaluation of Foliar Application of Cytokinin, Iron, Zinc and Selenium on Chlorophyll Fluorescence Parameters of Wheat (Triticum aestivum L.) under Drought Stress [PDF]

open access: yesپژوهشهای زراعی ایران
Introduction Environmental stresses are important factors in reducing agricultural production worldwide. Plants are continuously exposed to various stresses under natural and agricultural conditions, and water scarcity is the most important limiting ...
A Faridnia   +4 more
doaj   +1 more source

Effects of Hydraulic Retention Time of Aquaculture Effluent on Nutrient Film Technique Lettuce Productivity

open access: yesAgronomy, 2022
Nutrient film technique (NFT) is a popular, ergonomic, hydroponic system, but is not often used in commercial aquaponic systems due to lower efficiency in overall nutrient removal.
Nathan Wallace-Springer   +4 more
doaj   +1 more source

Parameters for the standardization of chlorophyll and assessment of PS II quantum efficiency for avocado (Persea americana Mill)

open access: yesBioscience Journal, 2017
The standard physiological parameters for assessing stress physiology, of plants, such as chlorophyll index and photosystem II fluorescence, are essential for measuring reactions of plants to stress conditions.
Edwin Antonio Gutierrez Rodrigues   +4 more
doaj   +3 more sources

Photosynthetic bark: Use of chlorophyll absorption continuum index to estimate Boswellia papyrifera bark chlorophyll content

open access: yesInternational Journal of Applied Earth Observation and Geoinformation, 2013
Quantification of chlorophyll content provides useful insight into the physiological performance of plants. Several leaf chlorophyll estimation techniques, using hyperspectral instruments, are available. However, to our knowledge, a non-destructive bark chlorophyll estimation technique is not available.
Atkilt Girma   +4 more
openaire   +2 more sources

Spectral shift as advanced index for fruit chlorophyll breakdown [PDF]

open access: yesFood and Bioprocess Technology, 2013
The decline of fruit chlorophyll is a valuable indicator of fruit ripeness. Fruit chlorophyll content can be nondestructively estimated by UV/VIS spectroscopy at fixed wavelengths. However, this approach cannot explain the complex changes in chlorophyll catabolism during fruit ripening.
Seifert, Birgit   +2 more
openaire   +1 more source

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