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57 Results Found

  • Article
  • Open Access
1,332 Views
17 Pages

This study aims to evaluate the nutrient status in the leaves of patchouli grown in Inceptisols soil in Aceh, Indonesia. The experiment utilized a randomized block design (RBD) with three replications. The study’s factor was applying fertilizer...

  • Article
  • Open Access
1 Citations
1,217 Views
18 Pages

Consequences of Micro- and Macronutrient Deficiencies on Physiological and Growth Metrics in Hydroponic ‘Thompson Seedless’ Grapevines

  • Maoxiang Zhao,
  • Jianjun He,
  • Jiebu Suolang,
  • Luyao Liu,
  • Faisal Hayat,
  • Shipping Wang,
  • Hafiz Umer Javed and
  • Lei Wang

(1) Background: Mineral nutrient deficiencies are a major constraint on grapevine growth and productivity, yet the clear identification of deficiency symptoms and their physiological impacts remains challenging. (2) Methods: In this study, ‘Tho...

  • Article
  • Open Access
9 Citations
2,727 Views
20 Pages

5 May 2023

Accurate diagnosis of pear tree nutrient deficiency symptoms is vital for the timely adoption of fertilization and treatment. This study proposes a novel method on the fused feature multi-head attention recording network with image depth and shallow...

  • Review
  • Open Access
79 Citations
13,208 Views
17 Pages

Leaf Senescence by Magnesium Deficiency

  • Keitaro Tanoi and
  • Natsuko I. Kobayashi

11 December 2015

Magnesium ions (Mg2+) are the second most abundant cations in living plant cells, and they are involved in various functions, including photosynthesis, enzyme catalysis, and nucleic acid synthesis. Low availability of Mg2+ in an agricultural field le...

  • Article
  • Open Access
4 Citations
3,279 Views
12 Pages

A New Strategy to Improve Vineyard Resilience: Grapevine Morphological Adaptation to Short-Term Nitrogen Deficiency

  • Daniel Grigorie Dinu,
  • Carmen Florentina Popescu,
  • Dorin Ioan Sumedrea,
  • Andreea Elena Manolescu,
  • Letitia Mariana Pandelea and
  • Laura Rustioni

2 June 2022

Nitrogen (N) deficiency causes a morphological disequilibrium between shoots and roots, favoring hypogeal growth. Our hypothesis is that short-term nitrogen deficiency could induce an increase in vine resilience, inducing root growth before the appea...

  • Article
  • Open Access
46 Citations
70,845 Views
14 Pages

Characterization of Nutrient Disorders of Cannabis sativa

  • Paul Cockson,
  • Hunter Landis,
  • Turner Smith,
  • Kristin Hicks and
  • Brian E. Whipker

18 October 2019

Essential plant nutrients are needed at crop-specific concentrations to obtain optimum growth or yield. Plant tissue (foliar) analysis is the standard method for measuring those levels in crops. Symptoms of nutrient deficiency occur when those tissue...

  • Article
  • Open Access
5 Citations
3,051 Views
15 Pages

11 July 2024

Accurately understanding the critical threshold of leaf magnesium (Mg) concentration is crucial for rapid diagnosis of crop Mg status; however, little information is available on critical Mg concentration for different physiological processes in dico...

  • Article
  • Open Access
494 Views
26 Pages

Corky split vein (CSV) is a common physiological disease in citrus that can result from multiple types of stresses. Preliminary field investigation found that more severe CSV in citrus cultivated in orchards lacking both boron (B) and other photosynt...

  • Article
  • Open Access
58 Citations
10,434 Views
19 Pages

Deep Learning for Non-Invasive Diagnosis of Nutrient Deficiencies in Sugar Beet Using RGB Images

  • Jinhui Yi,
  • Lukas Krusenbaum,
  • Paula Unger,
  • Hubert Hüging,
  • Sabine J. Seidel,
  • Gabriel Schaaf and
  • Juergen Gall

18 October 2020

In order to enable timely actions to prevent major losses of crops caused by lack of nutrients and, hence, increase the potential yield throughout the growing season while at the same time prevent excess fertilization with detrimental environmental c...

  • Article
  • Open Access
2 Citations
2,388 Views
21 Pages

CNDD-Net: A Lightweight Attention-Based Convolutional Neural Network for Classifying Corn Nutritional Deficiencies and Leaf Diseases

  • Suresh Timilsina,
  • Sandhya Sharma,
  • Samir Gnawali,
  • Kazuhiko Sato,
  • Yoshifumi Okada,
  • Shinya Watanabe and
  • Satoshi Kondo

Plant diseases and nutrient deficiencies pose significant challenges to food production, making it crucial to identify them accurately and quickly, as their symptoms can often be similar. Prompt and precise detection is essential to implement effecti...

  • Article
  • Open Access
1 Citations
1,874 Views
14 Pages

23 March 2024

Perennial grains have been proposed as a soil-healthy alternative to annual grains. Intermediate wheatgrass (Thinopyrum intermedium), whose seed is currently sold under the trade name Kernza®, and silflower (Silphium integrifolium), which is in t...

  • Article
  • Open Access
10 Citations
2,615 Views
20 Pages

Morpho-Physiological, Chlorophyll Fluorescence, and Diffuse Reflectance Spectra Characteristics of Lettuce under the Main Macronutrient Deficiency

  • Elena V. Kanash,
  • Nadezhda G. Sinyavina,
  • Dmitryi V. Rusakov,
  • Ksenia V. Egorova,
  • Gayane G. Panova and
  • Yuriy V. Chesnokov

The aim of the present work was to assess the physiological state of plants and photosynthetic apparatus activity in lettuce (Lactuca sativa L.) by non-invasive methods (leaf diffuse reflectance spectroscopy and chlorophyll fluorescence) under the de...

  • Article
  • Open Access
31 Citations
12,664 Views
11 Pages

Detection and Response of Sugarcane against the Infection of Sugarcane Mosaic Virus (SCMV) in Indonesia

  • Hardian Susilo Addy,
  • Nurmalasari,
  • Agus Heri Setyo Wahyudi,
  • Ahmil Sholeh,
  • Cahya Anugrah,
  • Febrian Eka Shandy Iriyanto,
  • Win Darmanto and
  • Bambang Sugiharto

Sugarcane mosaic virus (SCMV) is one among many viruses that infect sugarcane, cause yield loss, and become serious disease agents on sugarcane plantations. Since the morphological symptoms of SCMV are similar to other symptoms caused by Sugarcane st...

  • Article
  • Open Access
148 Citations
16,128 Views
32 Pages

A Wireless Sensor Network for Vineyard Monitoring That Uses Image Processing

  • Jaime Lloret,
  • Ignacio Bosch,
  • Sandra Sendra and
  • Arturo Serrano

7 June 2011

The first step to detect when a vineyard has any type of deficiency, pest or disease is to observe its stems, its grapes and/or its leaves. To place a sensor in each leaf of every vineyard is obviously not feasible in terms of cost and deployment. We...

  • Article
  • Open Access
30 Citations
14,398 Views
16 Pages

Essential plant nutrients are needed at crop-specific concentrations to obtain optimal growth and yield. Foliar tissue analysis is the standard method for assessing nutrient levels in plants. Symptoms of nutrient deficiency or toxicity occur when the...

  • Article
  • Open Access
7 Citations
2,629 Views
15 Pages

New Symptoms in Castanea sativa Stands in Italy: Chestnut Mosaic Virus and Nutrient Deficiency

  • Sergio Murolo,
  • Daniela Bertoldi,
  • Federico Pedrazzoli,
  • Manuela Mancini,
  • Gianfranco Romanazzi and
  • Giorgio Maresi

11 November 2022

The European chestnut characterizes both the landscape and economy of mountainous Italian areas. In recent years, new canopy disorders have been reported: “chestnut yellows”, often ascribed to phytoplasma and/or nutrient deficiency, and &...

  • Article
  • Open Access
8 Citations
3,204 Views
17 Pages

Magnesium (Mg) is an essential macronutrient in plants and plays a critical role in numerous physiological processes. Therefore, Mg deficiency severely affects plant growth and crop production. This study aimed to investigate the effects of Mg defici...

  • Article
  • Open Access
12 Citations
5,987 Views
17 Pages

26 November 2019

The determination of plant nitrogen (N) content (%) in wheat via destructive lab analysis is expensive and inadequate for precision farming applications. Vegetation indices (VI) based on spectral reflectance can be used to predict plant N content ind...

  • Article
  • Open Access
11 Citations
4,100 Views
18 Pages

Foliar Micronutrient Application for High-Yield Maize

  • Zachary P. Stewart,
  • Ellen T. Paparozzi,
  • Charles S. Wortmann,
  • Prakash Kumar Jha and
  • Charles A. Shapiro

11 December 2020

Nebraska soils are generally micronutrient sufficient. However, critical levels for current yields have not been validated. From 2013 to 2015, 26 on-farm paired comparison strip-trials were conducted across Nebraska to test the effect of foliar-appli...

  • Article
  • Open Access
13 Citations
32,451 Views
12 Pages

Visual Symptoms, Vegetative Growth, and Mineral Concentration in Fig Tree (Ficus carica L.) Under Macronutrient Deficiencies

  • Carlos Alberto Garza-Alonso,
  • Emilio Olivares-Sáenz,
  • Adriana Gutiérrez-Díez,
  • Rigoberto E. Vázquez-Alvarado and
  • Alfredo López-Jiménez

22 November 2019

The common fig is an edible fruit which is appreciated for its organoleptic characteristics and high commercial value. Several factors, including mineral nutrition, affect fig production. Macronutrients fulfill specific functions in the metabolism of...

  • Feature Paper
  • Article
  • Open Access
12 Citations
4,669 Views
18 Pages

Aquaponics is a promising cultivation technique for combined production of crops and fish, on the condition of tackling certain nutrients deficiencies. The aim of the present study was to examine the limitations imposed by the system on spinach (Spin...

  • Article
  • Open Access
804 Views
16 Pages

3 September 2025

Grapefruit (Citrus × paradisi Macfad.) is susceptible to Huanglongbing (HLB) disease, which prominently affects tree health and leads to a substantial loss of productivity. HLB-affected trees exhibit a nutritional imbalance expressed in either...

  • Article
  • Open Access
6 Citations
3,282 Views
15 Pages

Incidence of GLMD-Like Symptoms on Grapevines Naturally Infected by Grapevine Pinot gris virus, Boron Content and Gene Expression Analysis of Boron Metabolism Genes

  • Tomáš Kiss,
  • Mária Kocanová,
  • Aleš Vavřiník,
  • Dorota Tekielska,
  • Jakub Pečenka,
  • Eliška Hakalová,
  • Milan Špetík,
  • Kateřina Štůsková,
  • Alla Eddine Mahamedi and
  • Miroslav Baránek
  • + 3 authors

21 May 2021

Grapevine Pinot gris virus (GPGV) is considered to be a causal agent of Grapevine Leaf Mottling and Deformation (GLMD) disease that has been reported worldwide through the grapevine-growing regions. Seven grapevines that were collected from a vineyar...

  • Article
  • Open Access
18 Citations
5,610 Views
19 Pages

Noninvasive Early Detection of Nutrient Deficiencies in Greenhouse-Grown Industrial Hemp Using Hyperspectral Imaging

  • Alireza Sanaeifar,
  • Ce Yang,
  • An Min,
  • Colin R. Jones,
  • Thomas E. Michaels,
  • Quinton J. Krueger,
  • Robert Barnes and
  • Toby J. Velte

2 January 2024

Hyperspectral imaging is an emerging non-invasive technology with potential for early nutrient stress detection in plants prior to visible symptoms. This study evaluated hyperspectral imaging for early identification of nitrogen, phosphorus, and pota...

  • Article
  • Open Access
8 Citations
5,169 Views
17 Pages

17 January 2024

Basil (Ocimum basilicum L.) contains abundant nutrients and is considered an economically important edible vegetable. The optimal nutrient levels will increase the productivity and basil quality. However, prominent research on basil regarding the dia...

  • Article
  • Open Access
354 Views
14 Pages

Influence of Fertigation Regimes on Nitrogen Concentration in Apple (Malus × domestica Borkh.) Leaves at Different Age Stages

  • Antun Šokec,
  • Goran Fruk,
  • Mihaela Šatvar Vrbančić,
  • Kristijan Konopka,
  • Tomislav Karažija and
  • Marko Petek

22 October 2025

Nitrogen (N) deficiency in apples (Malus × domestica Borkh.) leads to characteristic physiological symptoms, including leaf and fruit discoloration. Fertigation, i.e., the application of dissolved fertilizers, can significantly improve the grow...

  • Article
  • Open Access
1 Citations
4,908 Views
17 Pages

7 January 2025

Background/Objectives: As an endurance multi-sport race, triathlon places significant energy demands on athletes during performance and training. Insufficient energy intake from food can lead to low energy availability (LEA) and Relative Energy Defic...

  • Article
  • Open Access
2 Citations
2,112 Views
15 Pages

13 October 2023

Xylella fastidiosa, a gram-negative bacterium vectored to plants via feeding of infected insects, causes a number of notorious plant diseases throughout the world, such as Pierce’s disease (grapes), olive quick decline syndrome, and coffee leaf...

  • Article
  • Open Access
37 Citations
13,753 Views
22 Pages

Smart Sensor for Real-Time Quantification of Common Symptoms Present in Unhealthy Plants

  • Luis M. Contreras-Medina,
  • Roque A. Osornio-Rios,
  • Irineo Torres-Pacheco,
  • Rene de J. Romero-Troncoso,
  • Ramon G. Guevara-González and
  • Jesus R. Millan-Almaraz

11 January 2012

Plant responses to physiological function disorders are called symptoms and they are caused principally by pathogens and nutritional deficiencies. Plant symptoms are commonly used as indicators of the health and nutrition status of plants. Nowadays,...

  • Article
  • Open Access
4 Citations
2,762 Views
14 Pages

Hydrogen Peroxide Mediates Premature Senescence Caused by Darkness and Inorganic Nitrogen Starvation in Physcomitrium patens

  • Md. Shyduzzaman Roni,
  • Md. Arif Sakil,
  • Most Mohoshena Aktar,
  • Chihiro Takatsuka,
  • Kyosuke Mukae,
  • Yuko Inoue-Aono and
  • Yuji Moriyasu

31 August 2022

Leaf senescence accompanied by yellowing and Rubisco degradation occurs prematurely in response to various stresses. However, signaling pathways between stress perception and senescence responses are not understood fully, although previous studies su...

  • Article
  • Open Access
21 Citations
6,776 Views
18 Pages

How Does Water-Stressed Corn Respond to Potassium Nutrition? A Shoot-Root Scale Approach Study under Controlled Conditions

  • Lionel Jordan-Meille,
  • Elsa Martineau,
  • Yoran Bornot,
  • José Lavres,
  • Cassio Hamilton Abreu-Junior and
  • Jean-Christophe Domec

16 November 2018

Potassium (K) is generally considered as being closely linked to plant water dynamics. Consequently, reinforcing K nutrition, which theoretically favors root growth and specific surface, extends leaf lifespan, and regulates stomatal functioning, is o...

  • Article
  • Open Access
21 Citations
5,201 Views
12 Pages

Risk of Low Energy Availability in National and International Level Paralympic Athletes: An Exploratory Investigation

  • Kelly Pritchett,
  • Alicia DiFolco,
  • Savannah Glasgow,
  • Robert Pritchett,
  • Katy Williams,
  • Trent Stellingwerff,
  • Patricia Roney,
  • Susannah Scaroni and
  • Elizabeth Broad

18 March 2021

(1) Background: The purpose of this study was to examine the symptoms of low energy availability (LEA) and risk of relative energy deficiency in sport (RED-S) symptoms in para-athletes using a multi-parameter approach. (2) Methods: National level par...

  • Article
  • Open Access
7 Citations
2,613 Views
24 Pages

Hyperspectral Data for Early Identification and Classification of Potassium Deficiency in Soybean Plants (Glycine max (L.) Merrill)

  • Renato Herrig Furlanetto,
  • Luís Guilherme Teixeira Crusiol,
  • Marcos Rafael Nanni,
  • Adilson de Oliveira Junior and
  • Rubson Natal Ribeiro Sibaldelli

25 May 2024

Identifying potassium (K+) deficiency in plants has traditionally been a difficult and expensive process. Traditional methods involve inspecting leaves for symptoms and conducting a laboratory analysis. These methods are not only time-consuming but a...

  • Article
  • Open Access
2 Citations
3,094 Views
12 Pages

Background: Kayaking is a high intensity sport that demands high levels of aerobic and anaerobic capacity as well as a great deal of strength and endurance. The aim of this study was an assessment of the frequency of occurrence of early low energy av...

  • Article
  • Open Access
5 Citations
1,705 Views
18 Pages

Supervised Hyperspectral Band Selection Using Texture Features for Classification of Citrus Leaf Diseases with YOLOv8

  • Quentin Frederick,
  • Thomas Burks,
  • Jonathan Adam Watson,
  • Pappu Kumar Yadav,
  • Jianwei Qin,
  • Moon Kim and
  • Megan M. Dewdney

9 February 2025

Citrus greening disease (HLB) and citrus canker cause financial losses in Florida citrus groves via smaller fruits, blemishes, premature fruit drop, and/or eventual tree death. Management of these two diseases requires early detection and distinction...

  • Article
  • Open Access
6 Citations
2,727 Views
23 Pages

11 November 2023

(1) Background: This study investigates the effects of potassium (K) and rootstock on the growth, photosynthetic activity, and mineral nutrition of lemon trees; (2) Methods: Lemon trees (cv. Adamopoulou) grafted onto sour orange (Citrus aurantium) (S...

  • Article
  • Open Access
122 Citations
17,558 Views
19 Pages

17 April 2019

During the process of plant growth, such as during the flowering stages and fruit development, the plants need to be provided with the various minerals and nutrients to grow. Nutrient deficiency is the cause of serious diseases in plant growth, affec...

  • Article
  • Open Access
32 Citations
7,987 Views
12 Pages

12 August 2020

Rhododendrons (Rhododendron spp.) are ornamental plants in the family Ericaceae that thrive in acidic soils and are challenged by neutral or alkaline soils. This soil requirement limits the locations where rhododendrons can be grown and causes chloro...

  • Feature Paper
  • Review
  • Open Access
26 Citations
19,894 Views
13 Pages

Sap Analysis: A Powerful Tool for Monitoring Plant Nutrition

  • Eduardo Esteves,
  • Guilherme Locatelli,
  • Neus Alcon Bou and
  • Rhuanito Soranz Ferrarezi

Horticultural crop production is moving towards an era of higher nutrient use efficiency since nutrient deficiencies can reduce plant growth, productivity, and quality, and overfertilization can cause environmental pollution. Rapid nutrient concentra...

  • Article
  • Open Access
606 Views
11 Pages

5 June 2025

Stem segments of Acacia mangium and A. auriculiformis containing full axillary buds were used to study the effects of reduced amounts of the main nitrogen source in the growth media. This condition, referred to as nitrogen deficiency in this article...

  • Article
  • Open Access
839 Views
20 Pages

Establishing Leaf Tissue Nutrient Standards and Documenting Nutrient Disorder Symptomology of Greenhouse-Grown Cilantro (Coriandrum sativum)

  • Danielle Clade,
  • Patrick Veazie,
  • Jennifer Boldt,
  • Kristin Hicks,
  • Christopher Currey,
  • Nicholas Flax,
  • Kellie Walters and
  • Brian Whipker

22 August 2025

Cilantro (Coriandrum sativum L.) is a popular annual culinary herb grown for its leaves or seeds. With the increase in hydroponic herb production in controlled environments, a need exists for leaf tissue nutrient standards specific to this production...

  • Article
  • Open Access
27 Citations
3,939 Views
17 Pages

Leaf Age-Dependent Effects of Boron Toxicity in Two Cucumis melo Varieties

  • Theocharis Chatzistathis,
  • Dimitrios Fanourakis,
  • Sasan Aliniaeifard,
  • Anastasios Kotsiras,
  • Costas Delis and
  • Georgios Tsaniklidis

13 April 2021

Boron (B) is an essential nutrient for plant growth and development, exhibiting extremely narrow margins between deficiency and toxicity. B toxicity is devastating for productivity and apparent for a continuously increasing part of agricultural land,...

  • Article
  • Open Access
9 Citations
2,895 Views
23 Pages

22 April 2022

Biological nitrogen fixation by legume-rhizobacterial symbiosis in temperate grasslands is an important source of soil nitrogen. The aim of the present study was to characterize the dependence of different accessions of T. fragiferum, a rare crop wil...

  • Proceeding Paper
  • Open Access
3 Citations
1,541 Views
6 Pages

Nutrient Interactions in the Natural Fortification of Tomato with Mg: An Analytical Perspective

  • Ana Rita F. Coelho,
  • Cláudia Campos Pessoa,
  • Ana Coelho Marques,
  • Inês Carmo Luís,
  • Diana Daccak,
  • Maria Manuela Silva,
  • Manuela Simões,
  • Fernando H. Reboredo,
  • Maria F. Pessoa and
  • Paulo Legoinha
  • + 5 authors

In the human body, about 53% of Mg is involved in the development and maintenance of bone and other calcified tissues, although it also has a physiological role in protein synthesis, muscle and nerve functions, blood glucose control and blood pressur...

  • Article
  • Open Access
26 Citations
9,687 Views
21 Pages

Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat

  • Gerassimos G. Peteinatos,
  • Audun Korsaeth,
  • Therese W. Berge and
  • Roland Gerhards

The success of precision agriculture relies largely on our ability to identify how the plants’ growth limiting factors vary in time and space. In the field, several stress factors may occur simultaneously, and it is thus crucial to be able to identif...

  • Article
  • Open Access
18 Citations
5,512 Views
9 Pages

Many gluten-free products are deficient in amino acids, especially in essential amino acids (EAA). Therefore, the incorporation of additives rich in free amino acids (FAA) into gluten-free products can be a promising strategy to alleviate certain sym...

  • Article
  • Open Access
11 Citations
3,759 Views
23 Pages

11 August 2022

Deficiency or excess of iron (Fe) and improper medium pH will inhibit the growth and development of plants, reduce the transfer and utilization of energy from the root to the leaf, and affect the utilization efficiency of inorganic nutrients. The mos...

  • Article
  • Open Access
6 Citations
2,490 Views
23 Pages

Genome-Wide Association Study to Identify Possible Candidate Genes of Snap Bean Leaf and Pod Color

  • Burcu Celebioglu,
  • John P. Hart,
  • Timothy Porch,
  • Phillip Griffiths and
  • James R. Myers

18 December 2023

Color can be an indicator of plant health, quality, and productivity, and is useful to researchers to understand plant nutritional content in their studies. Color may be related to chlorophyll content and photosynthetic activity and provides informat...

  • Article
  • Open Access
7 Citations
4,700 Views
15 Pages

7 March 2023

High electrical conductivity (EC) in cultivation systems with the recirculating nutrient solutions can affect plant growth and development. This study aimed to investigate the effect of salicylic acid (SA) on the selected physiological and biochemica...

  • Article
  • Open Access
2 Citations
1,976 Views
11 Pages

21 June 2023

Transplanted rice cultivation has caused groundwater depletion in several regions globally. Direct-seeded rice under aerobic conditions is a water-saving alternative. However, under aerobic conditions, iron in the soil is oxidized from the ferrous to...

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