Results 11 to 20 of about 379,139 (308)

تأثیر سطوح شوری آب آبیاری با NaCl بر فیلوکرون و سرعت ظهور برگ ارقام جو [PDF]

open access: yesتنش های محیطی در علوم زراعی, 2016
شوری منابع آب‌وخاک از مهم‌ترین مشکلات کشاورزی در مناطق خشک و نیمه‌خشک ایران است. برای بررسی تأثیر شوری آب آبیاری بر فیلوکرون و سرعت ظهور برگ ارقام جو، آزمایشی به‌صورت فاکتوریل در قالب طرح پایه بلوک‌های کامل تصادفی با سه تکرار در گلخانه دانشکده کشاورزی ...
رئوف سیدشریفی   +1 more
doaj   +1 more source

Comparison of LiDAR-based Models for True Leaf Area Index and Effective Leaf Area Index Estimation in Young Beech Forests

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2020
The leaf area index (LAI) is one of the most common leaf area and canopy structure quantifiers. Direct LAI measurement and determination of canopy characteristics in larger areas is unrealistic due to the large number of measurements required to create ...
Zdeněk Patočka   +5 more
doaj   +1 more source

The evaluation of leaf area by the grapewine

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2009
The contribution deals with leaf area assesment of 9 grapevine varieties. The measurements were carried out by means of Leaf Area Metr CI-202 (scanner type).
Patrik Burg, Pavel Zemánek
doaj   +1 more source

Leaf area index of potato crop under three nitrogen fertilization treatments

open access: yesAgronomía Colombiana, 2017
Nitrogen fertilization has considerable effects on growth and yield of the potato crop. Additionally, leaf expansion is one of the most important growth parameters that can be used to optimize the management of agroecological resources.
Pedro Manuel Villa
doaj   +1 more source

Influence of canopy development in the vineyard on spray deposition from a tunnel sprayer

open access: yesJournal of Agricultural Engineering, 2018
Spray deposition from a tunnel, air-assisted sprayer was analysed during the whole season, following canopy development in a vertical-shoot-positioned vineyard.
Gianfranco Pergher, Nicola Zucchiatti
doaj   +1 more source

Sensitivity analysis of leaf wetness duration within a potato canopy [PDF]

open access: yes, 2009
A description and analysis is given of a wetness duration experiment, carried out in a potato field in the centre of the Netherlands in September 2005.
Heusinkveld, B.G.   +3 more
core   +3 more sources

Leaf area  Index measurements for  Pinus brutia  Ten. Plantations in Northern Iraqi [PDF]

open access: yesMesopotamia Journal of Agriculture
The surface area of the leaves of trees that perform photosynthesis is expressed by the leaf area index (LAI) for pine trees with different densities, using direct methods by collecting field data in 2022 from (30) samples, and measurements were taken of
Maan Shekho   +2 more
doaj   +1 more source

Effect of fruit-to-leaf area ratio on fruit quality and vegetative growth of 'bing' sweet cherry trees at optimal leaf area index [PDF]

open access: yes, 2008
Fruit yield and quality determine grower income from commercial sweet cherry orchards. The objective of this study was to determine the effect of Fruit Number to Leaf Area Ratio (FNLAR, fruit m-2 LA) on Mean Fruit Weight (MFW), firmness (F), soluble ...
Cittadini, E.D.   +5 more
core   +2 more sources

Downscaling of MODIS leaf area index using landsat vegetation index [PDF]

open access: yesGeocarto International, 2020
Several organizations provide satellite Leaf Area Index (LAI) data regularly, at various scales, at high frequency, but at low spatial resolution.
Georgios Ovakoglou   +3 more
openaire   +1 more source

A Simulation Study Using Terrestrial LiDAR Point Cloud Data to Quantify Spectral Variability of a Broad-Leaved Forest Canopy

open access: yesSensors, 2018
In this analysis, a method for construction of forest canopy three-dimensional (3D) models from terrestrial LiDAR was used for assessing the influence of structural changes on reflectance for an even-aged forest in Belgium.
Renato Cifuentes   +4 more
doaj   +1 more source

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