Nitrogen fixation (15N dilution) with soybeans under Thai field conditions

1988 ◽  
Vol 108 (1) ◽  
pp. 33-41 ◽  
Author(s):  
R. M. N. Kucey ◽  
P. Snitwongse ◽  
P. Chaiwanakupt ◽  
P. Wadisirisuk ◽  
C. Siripaibool ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Field Conditions ◽  
15N Dilution

Nitrogen fixation (15N dilution) with soybeans under Thai field conditions

1988 ◽  
Vol 108 (1) ◽  
pp. 87-92 ◽  
Author(s):  
R. M. N. Kucey ◽  
P. Chaiwanakupt ◽  
T. Arayangkool ◽  
P. Snitwongse ◽  
C. Siripaibool ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Field Conditions ◽  
15N Dilution

scholarly journals Growth and nitrogen fixation in Azolla pinnata under field conditions

1982 ◽  
Vol 10 (2) ◽  
pp. 205 ◽  
Author(s):  
S. A. Kulasooriya ◽  
W. K. Hirimburegama ◽  
S. W. Abeysekara
Keyword(s):  
Nitrogen Fixation ◽  
Field Conditions ◽  
Azolla Pinnata

scholarly journals Effect of Soil Textural Classes on the Biological Nitrogen Fixation by Bradyrhizobium Measured by 15N Dilution Analysis

2016 ◽  
Vol 13 (4) ◽  
pp. 734-744
Author(s):  
Baghdad Science Journal
Keyword(s):  
Nitrogen Fixation ◽  
Statistical Analysis ◽  
Soil Texture ◽  
Biological Nitrogen Fixation ◽  
Significant Variation ◽  
Accurate Determination ◽  
Dry Weight ◽  
Clay Loam ◽  
15N Dilution ◽  
Biological Nitrogen

The current study was conductedas a pot experiment to determine the effect of soil texture on biological nitrogen fixation (BNF) of six most efficient local isolates, specified, of Bradyrhizobium. Cowpea (Vignaunguiculata L.), as a legume host crop, was used as a host crop and 15N dilution analysis was used for accurate determination of the amount of N biologically fixed under experimental parameters specified. Soils used are clay loam, sandy clay loam and sandy loam. Biological Nitrogen Fixation (BNF), in different soil textural classes, was as in the following order: medium texture soil > heavy texture soil > light textured soil. Statistical analysis showed that there is a significant variation in BNF % among six Iraqi isolates in the three soil textural classes. There is a significant variation in the number of the nodules of the six Isolates in one soil texture. However, nodules number does not agree with the BNF% in the same soil for any isolates. Statistical analysis of the data showed that there were significant differences in plant dry weight among the soil textural classes all over local isolates used in this study. Data also showed that there were significant differences in dry weight under different isolates.

Assessment of Nitrogen Fixation in Terrestrial Environments in Field Conditions

Nature ◽  
1970 ◽  
Vol 227 (5256) ◽  
pp. 378-379 ◽  
Author(s):  
W. S. SILVER ◽  
TIMOTHY MAGUE
Keyword(s):  
Nitrogen Fixation ◽  
Field Conditions ◽  
Terrestrial Environments

RHIZOBIAL INOCULATION AND P FERTILIZATION RESPONSE IN COMMON BEAN (PHASEOLUS VULGARIS) UNDER GLASSHOUSE AND FIELD CONDITIONS

2007 ◽  
Vol 43 (1) ◽  
pp. 67-77 ◽  
Author(s):  
M. ZAMAN-ALLAH ◽  
B. SIFI ◽  
B. L'TAIEF ◽  
M. H. EL AOUNI ◽  
J. J. DREVON
Keyword(s):  
Nitrogen Fixation ◽  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Symbiotic Nitrogen Fixation ◽  
Field Conditions ◽  
Nutrient Deficiencies ◽  
P Fertilization ◽  
Rhizobium Tropici ◽  
Symbiotic Efficiency ◽  
Rhizobial Inoculation

Osmotic constraints, nutrient deficiencies, especially phosphorus, and the lack of efficient strains of rhizobia in Mediterranean soils are major factors limiting symbiotic nitrogen fixation and yield in common bean (Phaseolus vulgaris). In order to improve yields, we investigated responses to rhizobial inoculation and P fertilization under glasshouse and field conditions with two bean cultivars, Coco blanc and BAT477. The nodulation test, using a hydroponic system in a glasshouse, revealed strong variability among 22 rhizobium strains of various origins, in their symbiotic efficiency, compared with Rhizobium tropici CIAT899. The introduced strains proved to be more efficient although some local rhizobia revealed high potential efficiencies. Glasshouse trials showed a significant effect of inoculation and P supply on nodulation, N content and shoot dry weight that varied with rhizobial strain. Field trials substantiated the glasshouse observations and emphasized the effects of cultivar-rhizobia interactions on symbiotic parameters and yields. It is concluded that inoculation with suitable rhizobia with supply of additional P is a technology that may improve symbiotic nitrogen fixation and yield in common bean in some soils under a Mediterranean climate.

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