Boron requirement and deficiency symptoms of fenugreek (Trigonella foenum–graecum) as shown in a water culture experiment with inoculation of Rhizobium

1980 ◽  
Vol 94 (2) ◽  
pp. 455-460 ◽  
Author(s):  
P. Mølgaard ◽  
R. Hardman
Keyword(s):  
Rhizobium Meliloti ◽  
Early Stage ◽  
Field Trials ◽  
Boron Deficiency ◽  
Trigonella Foenum Graecum ◽  
Deficiency Symptoms ◽  
High Calcium ◽  
High Boron ◽  
Whole Plants ◽  
Low Nitrogen

SummaryThis experiment was made to determine the possible reason for deficiency symptoms seen on fenugreek (Trigonella foenum-graecum) in field trials during the dry summer of 1976. Using rockwool cubes for root support, it was shown that symptoms seen in the field plants resulted from boron deficiency.The symptoms of boron deficiency in fenugreek are described and illustrated. The main symptoms were failure offloweringor fertilization, decreased apical growth, small crisped leaves in a terminal rosette and a gradual yellowing of the lower leaves. In combination with low nitrogen, the boron-deficient plants had yellow, succulent leaves at a very early stage. High calcium and high nitrogen increased the demand for boron.Inoculation with Rhizobium meliloti of plants with a low nitrogen supply was performed with success. The bacteria formed healthy, pink nodules on the roots inside the rockwool cubes.The lowest content of boron in whole plants showing boron deficiency symptoms (no pods formed) was 13 μg/g and in this respect fenugreek is very similar to lucerne (Medicago sativa), a plant known to have a high boron requirement. Fenugreek has a high tolerance of excess boron.

Expression Profiles of 10,422 Genes at Early Stage of Low Nitrogen Stress in Rice Assayed using a cDNA Microarray

2006 ◽  
Vol 60 (5) ◽  
pp. 617-631 ◽  
Author(s):  
Xingming Lian ◽  
Shiping Wang ◽  
Jianwei Zhang ◽  
Qi Feng ◽  
Lida Zhang ◽  
...  
Keyword(s):  
Cdna Microarray ◽  
Early Stage ◽  
Expression Profiles ◽  
Nitrogen Stress ◽  
Low Nitrogen Stress ◽  
Low Nitrogen

PENGEMBANGAN MEDIA BELAJAR PJOK PADA MATERI SENAM LANTAI (ARTISTIK)

2020 ◽  
Vol 8 (2) ◽  
pp. 86
Author(s):  
Zulbahri Zulbahri ◽  
Yuni Astuti ◽  
Erianti . ◽  
Pitnawati . ◽  
Damrah .
Keyword(s):  
Research And Development ◽  
Small Group ◽  
Quantitative Data ◽  
Early Stage ◽  
Field Trials ◽  
Development Research ◽  
Initial Product ◽  
Initial Stage ◽  
Stage 4 ◽  
The Media

This research is motivated by the limited development of learning media for the subjects of Physical Education, Sports and Health on floor exercise (artistic) material, especially for schools in the regions. This study aims to produce a learning media product for students and students in learning gymnastics. The subjects or samples of this research were FIK UNP students who attended basic and advanced / learning gymnastics courses with a total of 12 people for small group subject trials and 15 people for field trials. The data used in this research are qualitative and quantitative data. Qualitative data in this study is data obtained through validation from material experts, media experts, while quantitative data in this study were obtained through assessment questionnaires which were analyzed with descriptive statistics.This research was conducted using "Research and Development" (Research and Development), namely the research method used to produce certain products. The model used as a reference is the Borg & Gall development research model with 10 developments, in this study the researcher adopted the following stages: 1) Preliminary Study (research and data collection). 2) Prepare a plan and analyze the media to be made. 3) Initial product development by producing learning media with validation by media experts and material experts. 4) Conduct small group trials. 5) Product Revisions. 6) Conduct field trials. 7) Revise the final product. For this early stage research, it has only arrived at the fourth stage (4), namely the initial stage validation by media experts and material experts. Research results in the form of learning media products for practical material with a score of 3.67 with good criteria and for media with a score of 3.3 with a fairly good category.

Boron Deficiency in a Southern Pine Nursery

1982 ◽  
Vol 6 (2) ◽  
pp. 108-112 ◽  
Author(s):  
E. L. Stone ◽  
C. A. Hollis ◽  
E. L. Barnard
Keyword(s):  
Pinus Taeda ◽  
Soil Management ◽  
Late Summer ◽  
Dry Weight ◽  
Height Growth ◽  
Boron Deficiency ◽  
First Year ◽  
Normal Height ◽  
High Calcium ◽  
Pinus Taeda L

Abstract Boron deficiency in seedling loblolly (Pinus taeda L.) and slash pine (Pinus elliotti Engelm.) in a northern Florida nursery was diagnosed by: (1) characteristic damage to shoot tips and buds, including necrosis of only part of the terminal; and (2) boron concentrations as low as only 1.9 ppm (dry weight) in affected tissues. Soil and soil-management features associated with deficiency include extremely low silt and clay contents, organic matter levels of 1 percent or less, lack of boron addition, and high calcium irrigation water leading to soil reactions above pH 6 by late summer. Consequences of deficiency were not limited to the nursery. Damaged seedlings that survived outplanting developed into bushy plants incapable of normal height growth in the first year or two.

scholarly journals Bio-chemical characterization of rhizobia isolated from root nodules of Velvet bean (Mucuna pruriens L.)

Our Nature ◽  
2017 ◽  
Vol 15 (1-2) ◽  
pp. 7-12 ◽  
Author(s):  
Som Prasad Paudyal ◽  
Vimal NP Gupta
Keyword(s):  
Rhizobium Meliloti ◽  
Root Nodules ◽  
Chemical Characterization ◽  
High Sensitivity ◽  
Mucuna Pruriens ◽  
Velvet Bean ◽  
Trigonella Foenum Graecum ◽  
Antibiotics Sensitivity ◽  
The Himalaya

Rhizobia are the symbiotic bacteria found in the soil which have potential ability to convert atmospheric di-nitrogen into usable form. A total of ten rhizobial strains were isolated from the root nodules of a medicinal legume Mucuna pruriens (L.) that commonly grow in the foothills of the Himalaya. All the ten   strains isolated from different locations of same area were morphologically, biochemically and physiologically characterized based on the Bergey’s Manual of systematic Bacteriology. They were tested for the antibiotics sensitivity. The isolates showed high sensitivity to amoxicillin and least to erythromycin. Authentication test was done in eleven legumes but shown nodulations only in Trigonella foenum-graecum, Mucuna pruriens and Medicago sativa. The morphology, physiology, biochemical and infection test studies carried out justifies that the bacteria isolated belonged to the species of Rhizobium meliloti.

Impact toughness of a 10% Cr steel with high boron and low nitrogen contents

2018 ◽  
Vol 730 ◽  
pp. 1-9 ◽  
Author(s):  
R. Mishnev ◽  
N. Dudova ◽  
V. Dudko ◽  
R. Kaibyshev
Keyword(s):  
Impact Toughness ◽  
High Boron ◽  
Nitrogen Contents ◽  
Low Nitrogen

Calcium nutrition of the tomato as influenced by total salts and ammonium nutrition

1971 ◽  
Vol 11 (52) ◽  
pp. 562 ◽  
Author(s):  
RE Barke ◽  
RC Menary
Keyword(s):  
Ammonium Sulphate ◽  
Soil Nutrient ◽  
Calcium Content ◽  
Field Trials ◽  
Calcium Deficiency ◽  
Ammonia Nitrogen ◽  
Physiological Disorder ◽  
Factors Affecting ◽  
Blossom End Rot ◽  
Whole Plants

Calcium deficiency in tomatoes was induced by adding ammonia nitrogen to the rooting medium. Ammonia was found to inhibit the absorption of calcium by the plant. When total soil nutrient concentration was varied, but the ratio of calcium to other ions held constant, blossom-end rot incidence was inversely related to the calcium level in fruits but was not necessarily associated with low calcium levels in leaves or whole plants. In the presence of high total salts, the incidence of the disorder could not be explained by a reduction in calcium content of whole plants and factors affecting distribution of the calcium within the plant were involved. The physiological disorder pith rot is described and evidence presented suggesting it is caused by a deficiency of calcium. Ammonia increased the incidence of the disorder but was not essential for its occurrence. In field trials on a red loam soil, ammonium sulphate reduced the pH values from 6.0 to 4.7, which prevented nitrification and induced pith rot and blossom-end rot through an accumulation of ammonia nitrogen. Calcium foliar sprays were able to offset yield reductions that were induced by moderate fertilizing with ammonium sulphate even where blossom-end rot did not occur. High total plant calcium was associated with reduced fruit yields.

Effect of Nitrogen Implants on Boron Transient Enhanced Diffusion

2000 ◽  
Vol 610 ◽  
Author(s):  
Omer Dokumaci ◽  
Paul Ronsheim ◽  
Suri Hegde ◽  
Dureseti Chidambarrao ◽  
Lahir Shaik-Adam ◽  
...  
Keyword(s):  
Low Temperature ◽  
Boron Diffusion ◽  
High Nitrogen ◽  
Enhanced Diffusion ◽  
Transient Enhanced Diffusion ◽  
High Boron ◽  
Buried Layer ◽  
Higher Doses ◽  
Low Nitrogen ◽  
Temperature Furnace

AbstractThe effect of nitrogen implants on boron transient enhanced diffusion was studied for nitrogen-only, boron-only, and boron plus nitrogen implants. A boron buried layer was used as a detector for interstitial supersaturation in the samples. Boron dose ranged from 1×1014 to 1×1015 cm−2 and N2+ dose from 5×1013 and 5×1014 cm−2. The energies were chosen such that the location of the nitrogen and boron peaks matched. After the implants, RTA and low temperature furnace anneals were carried out. The diffusivity enhancements were extracted from the buried layer profiles by simulation. Nitrogen-only implants were found to cause significant enhanced diffusion on the buried boron layer. For lower doses, the enhancement of the nitrogen implant is about half as that of boron whereas the enhancements are equal at higher doses. Nitrogen coimplant with boron increases the transient enhanced diffusion of boron at low boron doses, which implies that nitrogen does not act as a strong sink for excess interstitials unlike carbon. At high boron doses, nitrogen co-implant does not significantly change boron diffusion. Sheet resistance measurements indicate that low nitrogen doses do not affect the activation of boron whereas high nitrogen doses either reduce the activation of boron or the mobility of the holes.

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