Nutrient deficiency symptoms in yams (Dioscorea spp.)

2004 ◽  
Vol 44 (4) ◽  
pp. 155-162 ◽  
Author(s):  
H Shiwachi ◽  
CC Okonkwo ◽  
R Asiedu
Keyword(s):  
Nutrient Deficiency ◽  
Deficiency Symptoms

Leaf—Nutrient Deficiency Symptoms

1984 ◽  
pp. 25-25
Author(s):  
Janice Glimn-Lacy ◽  
Peter B. Kaufman
Keyword(s):  
Nutrient Deficiency ◽  
Deficiency Symptoms

scholarly journals A Study of Factors Influencing Plant Growth by WSN Approach and Plant Nutrient Deficiency Classification in Tomato Using SVM

2021 ◽  
Vol 23 (06) ◽  
pp. 36-46
Author(s):  
Vrunda Kusanur ◽  
◽  
Veena S Chakravarthi ◽  
Keyword(s):  
Machine Learning ◽  
Plant Growth ◽  
Nutrient Deficiency ◽  
Learning Model ◽  
Plant Nutrients ◽  
Polynomial Kernel ◽  
Second Phase ◽  
Nutrient Deficiencies ◽  
Deficiency Symptoms ◽  
Machine Learning Model

Soil temperature and humidity straight away influence plant growth and the availability of plant nutrients. In this work, we carried out experiments to identify the relationship between climatic parameters and plant nutrients. When the relative humidity was very high, deficiency symptoms were shown on plant leaves and fruits. But, recognizing and managing these plant nutrients manually would become difficult. However, no much research has been done in this field. The main objective of this research was to propose a machine learning model to manage nutrient deficiencies in the plant. There were two main phases in the proposed research. In the first phase, the humidity, temperature, and soil moisture in the greenhouse environment were collected using WSN and the influence of these parameters on the growth of plants was studied. During experimentation, it was investigated that the transpiration rate decreased significantly and the macronutrient contents in the plant leave decreased when the humidity was 95%. In the second phase, a machine learning model was developed to identify and classify nutrient deficiency symptoms in a tomato plant. A total of 880 images were collected from Bingo images to form a dataset. Among all these images, 80% (704 images) of the dataset were used to train the machine learning model and 20% (176 images) of the dataset were used for testing the model performance. In this study, we selected K-means Clustering for key points detection and SVM for classification and prediction of nutrient stress in the plant. SVM using linear kernel performed better with the accuracy rates of 89.77 % as compared to SVM using a polynomial kernel.

scholarly journals  Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts.

2011 ◽  
Vol 57 (No. 4) ◽  
pp. 141-152
Author(s):  
J. Pecháček ◽  
D. Vavříček ◽  
P. Samec
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Nutrient Deficiency ◽  
Normal Growth ◽  
Nutrient Status ◽  
Limiting Factor ◽  
Soil Environment ◽  
Deficiency Symptoms ◽  
Humus Substances ◽  
Statistical Survey

The main objective of this study was to investigate the causes of nutrient deficiency symptoms in Norway spruce (Picea abies [L.] Karst.) underplantings in the Hrub&yacute; Jesen&iacute;k Mts. In the area concerned 19 research plots were established, representing the ridge sites of the 8th FAZ of acid edaphic categories. On these plots samples were taken from topmost soil horizons and needle samples were collected in two series &ndash; from healthy and from damaged trees. The results of this study demonstrate that the nutrient deficiency symptoms and reduced vitality of evaluated underplantings were caused by the insufficient uptake of main nutrients (Mg, P, K, N<sub>t</sub>). High contents of toxic elements Al, S in damaged needles are another factor that negatively influences the health status of these underplantings.<br />A statistical survey showed that damage to underplantings increased with decreasing proportions of main nutrients (N<sub>t</sub>, Mg, Ca, K) in organomineral horizons. At the same time the content of basic nutrients (N<sub>t</sub>, Mg, Ca, K) was found to increase in this horizon with an increasing proportion of oxidizable organic carbon (C<sub>ox</sub>). The proportion of humus substances and the content of basic nutrients (N<sub>t</sub>, Mg, Ca, K) in organomineral horizons become a limiting factor for the normal growth and development of Norway spruce plantings in the ridge part of the Hrub&yacute; Jesen&iacute;k Mts.

Plant Nutrient Deficiency Symptoms

2003 ◽  
Vol 65 (4) ◽  
pp. 246-246
Author(s):  
David R. Hershey
Keyword(s):  
Nutrient Deficiency ◽  
Plant Nutrient ◽  
Deficiency Symptoms

scholarly journals (348) Geranium Nutrient Deficiency Symptoms, Partitioning, and Bioenergetic Costs of Construction

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1060D-1060
Author(s):  
Dharmalingam S. Pitchay ◽  
Jonathan M. Frantz ◽  
James C. Locke
Keyword(s):  
Nutrient Deficiency ◽  
Production Quality ◽  
Construction Costs ◽  
Additional Tool ◽  
Deficiency Symptoms ◽  
Hidden Hunger ◽  
Advanced Stages ◽  
Essential Nutrient ◽  
Chlorotic Leaf ◽  
The Impact

Geranium (Pelargonium ×hortorum) is considered to be one of the top-selling floriculture plants, and is highly responsive to increased macro- and micronutrient bioavailability. In spite of its economic importance, there are few nutrient disorder symptoms reported for this species. The lack of nutritional information contributes to suboptimal geranium production quality. Understanding the bioenergetic construction costs during nutrient deficiency can provide insight into the significance of that element predisposing plants to other stress. Therefore, this study was conducted to investigate the impact of nutrient deficiency on plant growth. Pelargonium plants were grown hydroponically in a glass greenhouse. The treatment consisted of a complete modified Hoagland's millimolar concentrations of macronutrients (15 NO3-N, 1.0 PO4-P, 6.0 K, 5.0 Ca, 2.0 Mg, and 2.0 SO4-S) and micromolar concentrations of micronutrients (72 Fe, 9.0 Mn, 1.5 Cu, 1.5 Zn, 45.0 B, and 0.1 Mo) and 10 additional solutions each devoid of one essential nutrient (N, P, Ca, Mg, S, Fe, Mn, Cu, Zn, or B). The plants were photographed and divided into young, maturing, and old leaves, the respective petioles, young and old stems, flowers, buds, and roots at “hidden hunger,” incipient, mid- and advanced-stages of nutrient stress. Unique visual deficiency symptoms of interveinal red pigmentation were noted on the matured leaves of P- and Mg-deficient plants, while N-deficient plants developed chlorotic leaf margins. Tissue N concentration greatly influenced bioenergetic construction costs, probably due to differences in protein content. This information will provide an additional tool in producing premium geraniums for the greenhouse industry.

scholarly journals Some Nutrient Deficiency Symptoms Displayed by Dracaena deremensis 'Warneckii' under Greenhouse Conditions and Their Subsequent Effects on Leaf Nutrient Content

1969 ◽  
Vol 61 (4) ◽  
pp. 456-464
Author(s):  
Saulo J. Rodríguez ◽  
Héctor R. Cibes ◽  
Jaime González-Ibañez
Keyword(s):  
Phosphorus Deficiency ◽  
Nutrient Deficiency ◽  
Culture Method ◽  
Nutrient Content ◽  
Solution Culture ◽  
Deficiency Symptoms ◽  
Mature Leaves ◽  
White Band ◽  
Young Leaves ◽  
Necrotic Spots

Thirty well-rooted cuttings of Dracaena deremensis 'Warneckii' Engler, were grown in 3-gal porcelain crocks using a solution culture method, with differential treatments consisting of solutions deficient in either N, P, K, Mg, Ca, S, Fe, Mn or B. An extra set of plants received a complete nutrient solution for comparison. By the end of the experiment, characteristic deficiency symptoms of only N, P, Ca, and Fe developed as follows: A lack of N induced a reduction in top growth and a pale green foliage. Younger leaves tended to be long and narrow with wavy margins. They also developed black spots along the typical white band near the margin. The root system of such plants was abundant and fibrous. New suckers were weak and few. Phosphorus deficiency was characterized by a rosettelike arrangement of the younger leaves. Necrotic spots like the ones developed under N deficiency were also present. These eventually broke down giving the leaves a ragged appearance. Margin serration occurred in the younger leaves, specially in the basal portions. On the other hand, the mature leaves developed numerous rustlike pustules. New shoots were deep green in color and few in number. Growth of plants lacking Ca was drastically reduced. Young, as well as recently mature leaves, were affected by severe marginal serration. As the deficiency became more acute, numerous brown spots appeared along the margins of older leaves. As they increased in size, they progressed either toward the tips or the mid rib, finally involving the whole lamina. Rustlike pustules similar to those exhibited by the minus-P plants also were present in some of the oldest leaves of plants lacking Ca. New shoots looked weak with blackish leaflets Fe-deficient plants manifested a severe chlorosis, which appeared early in the young leaves. Some of the chlorotic leaves developed necrotic spots along the basal portion. As they increased in size the whole leaf was invaded. The concentration of the particular missing element in the leaf tissues was lower in plants grown with the element withheld than in the controls.

scholarly journals (213) Establishing Minimum Critical Nutrient Standards for Herbaceous Perennials

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1084A-1084
Author(s):  
Allison L. Byrd ◽  
Velva A. Groover ◽  
Holly L. Scoggins
Keyword(s):  
Crop Production ◽  
Nutrient Deficiency ◽  
Nutrient Deficiencies ◽  
Chronological Order ◽  
Hydroponic System ◽  
Herbaceous Perennials ◽  
Deficiency Symptoms ◽  
Advanced Stages ◽  
Calcium Magnesium ◽  
Copper Zinc

Herbaceous perennials comprise one of the fastest-growing segments of floriculture crop production. Little information has been published regarding their mineral nutrition requirements, specifically nutrient foliar standards and nutrient deficiency symptoms. Our research documents visual symptoms of nutrient deficiencies in the chronological order in which they appear from incipient to advanced stages, and establishes foliar analysis standards by correlating nutrient levels with initial and advanced stages of symptoms for nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, copper, zinc, manganese, molybdenum, and boron. Rooted cuttings were grown for as many as 12 weeks in a hydroponic system with modified Hoagland's solution minus the element of interest, along with complete nutrient solution controls. Taxa selected for study were representative of commonly grown varieties and of differing families; Verbena canadensis `Homestead Purple' (clump verbena), Heliopsis helianthoides `Bressingham Doubloon' (false sunflower) and Veronica × `Goodness Grows' (speedwell). Days to incipient deficiency symptoms ranged from 5 to 60. Chronological order of appearance was consistent with Fe and Ca symptoms appearing within 10 days for all three taxa. Other deficiency symptoms varied both by taxa and in chronology. Root and shoot dry weights were closely and positively correlated with time to incipient deficiency.

scholarly journals Physiological responses of hydroponically-grown Japanese mint under nutrient deficiency

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7751 ◽  
Author(s):  
Chananchida Janpen ◽  
Naruemon Kanthawang ◽  
Chaiartid Inkham ◽  
Fui Ying Tsan ◽  
Sarana Rose Sommano
Keyword(s):  
Plant Stress ◽  
Nutrient Deficiency ◽  
Culture Technique ◽  
Growth Patterns ◽  
Deficiency Symptoms ◽  
Japanese Mint ◽  
Iron Treatment ◽  
Phosphorus And Potassium ◽  
Hydroponically Grown ◽  
Nutrient Solutions

This research aims to determine growth and deficiency patterns as well as antioxidative potentials of Japanese mint (Mentha arvensis) hydroponically grown under limited macronutrients and micronutrients. The experiment was conducted for 60 days after transplanting in an evaporative greenhouse (avg temp = 28–30 °C, 60–65 %RH), using deep water culture technique. Plants were grown in nutrient solution consisting of complete Hoagland’s solution (CTRL), and nutrient solutions lacking one of the following macronutrients and micronutrients: nitrogen (-N), phosphorus (-P), potassium (-K), iron (-Fe), manganese (-Mn), and copper (-Cu). The deficiency symptoms, growth patterns, and stress response mechanism were followed. All treatments except for the CTRL induced deficiency symptoms and physiological changes. Macronutrient deprivation reduced growth determined by the morphological parameters while micronutrient omission had no effect except for no iron treatment. The result showed that potassium and iron deficiencies had foremost adversely effect on growth of Japanese mint. Under nutrient stress conditions, plant only gave antioxidative responses to phosphorus and potassium deficiencies. However, the negative plant-stress relationship was found for no iron treatment indicating the detoxification mode of plant for lacking of micronutrient.

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