Results 21 to 30 of about 16,351 (250)
Nondestructive analysis of photosynthetic pigments in forage radish and vetch
Revista Ceres, 2020 Chlorophylls and carotenoids are the main photosynthetic pigments in plants, and photosynthetic potential can be used to determine the nitrogen fixation or cycling capacity of cover crops.
Tiago Edu Kaspary +4 more
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Designing and Developing a Machine Vision System to Predict the Chlorophyll and Carotenoid Content of Plant Leaves [PDF]
Journal of Agricultural Machinery, 2019 Introduction Leaf color is usually used as a guide for assessments of nutrient status and plant health. Most of the existing methods that examined relationships between chlorophyll status and carotenoid of leaf color were developed for particular species.
H Biabi +3 more
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Ciência e Agrotecnologia, 2022 The monitoring of chlorophyll content in grapevine leaves allows us to evaluate their N status, assisting with the information for the decision make about nutrient rate and application time to the vineyard.
Thassio Monteiro Menezes da Silva +4 more
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Use of the atLEAF+ chlorophyll meter for a nondestructive estimate of chlorophyll content
Photosynthetica, 2016 At present, chlorophyll meters are widely used for a quick and nondestructive estimate of chlorophyll (Chl) contents in plant leaves. Chl meters allow to estimate the Chl content in relative units - the Chl index (CI). However, using such meters, one can face a problem of converting CI into absolute values of the pigment content and comparing data ...
E. V. Novichonok +3 more
openaire +1 more source
Field Assessment of Macronutrients and Nitrogen in Apple Leaves Using a Chlorophyll Meter
HortTechnology, 2019 Nutrient content assessment of plant tissues is widely performed by farmers to determine the appropriate amount of fertilization to use for their crops. A nondestructive leaf chlorophyll meter is one of the most commonly used devices for performing field
Youngsuk Lee +3 more
doaj +1 more source
HortTechnology, 2019 Nitrogen (N) management in macadamia (Macadamia integrifolia) orchards is an important concern for growers. Leaf tissue analysis is the accepted method for determining N status in macadamia; however, this process is expensive and time-consuming.
Russell Galanti +3 more
doaj +1 more source
Nitrogen uptake and chlorophyll meter measurements in Spring Wheat
Nutrient Cycling in Agroecosystems, 1999 A Spring Wheat crop was grown using three irrigation levels and nitrogen rate applications to evaluate chlorophyll meter measurements as a possible nitrogen nutrition index for modelling. These measurements yielded the most reliable indications at Zadoks GS45. The lower limit indicating severe nitrogen deficiency in the leaves was approximately 35 SPAD
VIDAL-PARRA, IVAN +2 more
openaire +3 more sources
浙江大学学报. 农业与生命科学版, 2013 Determination of chlorophyll concentration has significance for photosynthesis and stress physiology since it is the main photosynthetic pigment in higher plant leaves.
LU Xiaoping +4 more
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Gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango as a function of fenpropimorph
Revista Brasileira de Engenharia Agrícola e Ambiental, 2022 The objective of the present study was to evaluate the influence of the application of fenpropimorph and paclobutrazol on gas exchanges and photosynthetic pigments of ‘Tommy Atkins’ mango grown in the semi-arid region in different evaluation periods. Two
Daniel de A. Carreiro +5 more
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Revista Brasileira de Ciência do Solo, 2012 Chlorophyll determination with a portable chlorophyll meter can indicate the period of highest N demand of plants and whether sidedressing is required or not.
Suelen Cristina Mendonça Maia +3 more
doaj +1 more source