Modeling Nitrogen Fixation and Its Relationship to Nitrogen Uptake in the CROPGRO Model

2008 ◽  
pp. 13-46
Author(s):  
Kenneth J. Boote ◽  
Gerrit Hoogenboom ◽  
James W. Jones ◽  
Keith T. Ingram
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake

Quantifying biological nitrogen fixation of different catch crops, and residual effects of roots and tops on nitrogen uptake in barley using in-situ 15N labelling

2015 ◽  
Vol 395 (1-2) ◽  
pp. 273-287 ◽  
Author(s):  
Xiaoxi Li ◽  
Peter Sørensen ◽  
Fucui Li ◽  
Søren O. Petersen ◽  
Jørgen E. Olesen
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Biological Nitrogen Fixation ◽  
Residual Effects ◽  
Catch Crops ◽  
15N Labelling ◽  
Biological Nitrogen

scholarly journals Yield, Soil Nitrogen Uptake, and Nitrogen Fixation by Soybean from Four Maturity Groups Grown at Three Elevations

1988 ◽  
Vol 80 (4) ◽  
pp. 563-567 ◽  
Author(s):  
Thomas George ◽  
Paul W. Singleton ◽  
B. Ben Bohlool
Keyword(s):  
Nitrogen Fixation ◽  
Soil Nitrogen ◽  
Nitrogen Uptake ◽  
Maturity Groups

Modeling Nitrogen Fixation and Its Relationship to Nitrogen Uptake in the CROPGRO Model

2008 ◽  
pp. 13-46 ◽  
Author(s):  
Kenneth Boote ◽  
Gerrit Hoogenboom ◽  
Keith Ingram ◽  
James Jones
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake

scholarly journals Nodulation, nitrogen fixation and nitrogen uptake in pigeonpea (Cajanus cajan (L.) Millsp) of different maturity groups

1987 ◽  
Vol 99 (2-3) ◽  
pp. 255-266 ◽  
Author(s):  
J. V. D. K. Kumar Rao ◽  
P. J. Dart
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Cajanus Cajan ◽  
Maturity Groups

scholarly journals Estimation of Nitrogen Fixation by the Natural15N-abundance Technique and Nitrogen Uptake by Pigeonpea Genotypes of Different Maturity Groups grown in an Inceptisol

1996 ◽  
Vol 177 (2) ◽  
pp. 129-138 ◽  
Author(s):  
J. V. D. K. Kumar Rao ◽  
C. Johansen ◽  
T. Yoneyama ◽  
S. Tobita ◽  
O. Ito
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Maturity Groups ◽  
Natural15n Abundance

YIELD AND NITROGEN UPTAKE OF FORAGE SEEDINGS AS AFFECTED BY NITROGEN FERTILIZATION

1961 ◽  
Vol 41 (1) ◽  
pp. 176-187 ◽  
Author(s):  
E. A. Grant ◽  
C. S. Brown
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Content ◽  
Nitrogen Uptake ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Total Yield ◽  
Yield Increase ◽  
Significant Yield ◽  
Second Year ◽  
Nitrogen Treatment

Over 2 tons of dry matter per acre were obtained from pure seedings of timothy and of brome in the seeding year with an application of 100 pounds of nitrogen per acre. Nitrogen at 200 and 400 pounds per acre produced no further significant yield increase. In the second year, yields were significantly increased by each increment of nitrogen applied in the seeding year up to and including 400 pounds per acre with brome and 200 pounds per acre with timothy. Nitrogen content of grasses increased with each increment of nitrogen in the seeding year but this effect was not consistent in the second year. Over the 2-year period grasses recovered approximately 65 per cent of the applied nitrogen at the 100- and 200-pound levels and about 40 per cent at the 400-pound level.Red clover and alfalfa seeded in mixture with timothy and with brome were about equal in yield to grass alone plus 100 pounds of nitrogen in the seeding year and were much superior in the second year. Application of 100 pounds of nitrogen to grass-legume mixtures increased both yield and nitrogen content in the first cutting. In subsequent cuttings, total yield and legume fraction of the yield were often depressed by nitrogen treatment; exceptions were noted where legume stands were weak.Apparent nitrogen fixation by the legumes was consistently reduced by nitrogen treatment. Vigorous legume stands had an apparent nitrogen fixation of 60 pounds per acre in the seeding year and up to 200 pounds in the second year.

Response of Azolla Caroliniana and Rice to Phosphorus Enrichment of the Azolla Inoculum and Phosphorus Fertilization During Intercropping

1995 ◽  
Vol 31 (1) ◽  
pp. 21-26 ◽  
Author(s):  
D. P. Singh ◽  
P. K. Singh
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Phosphorus Content ◽  
Dry Weight ◽  
Phosphorus Fertilization ◽  
Higher Plant ◽  
Phosphorus Enrichment ◽  
Straw Yield ◽  
Azolla Caroliniana ◽  
Nitrogen Yield

SummaryThe effects of phosphorus enrichment of Azolla inoculum and phosphorus fertilization during intercropping on the growth, nitrogen fixation and phosphorus content of Azolla caroliniana and the grain yield, straw yield and nitrogen uptake of rice were studied for four consecutive seasons. The phosphorus-enriched Azolla maintained a higher plant phosphorus content and produced a greater biomass and nitrogen yield than the unenriched Azolla. Application of phosphorus during intercropping significantly increased the dry weight, nitrogen yield and phosphorus content of both unenriched and phosphorus-enriched Azolla. The differences between the enriched and unenriched Azolla declined as increasing levels of phosphorus were applied during intercropping. The grain and straw yields and nitrogen uptake of rice were increased both by phosphorus-enrichment of Azolla inoculum and by phosphorus fertilization during intercropping.La gestión de fósforos para la siembra simultánea del Azolla y el arroz

Effect of improved management of legumes in a legume-cereal rotation on field estimates of crop nitrogen uptake and symbiotic nitrogen fixation in northern Syria

1988 ◽  
Vol 110 (3) ◽  
pp. 651-659 ◽  
Author(s):  
J. D. H. Keatinge ◽  
N. Chapanian ◽  
M. C. Saxena
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Symbiotic Nitrogen Fixation ◽  
N Uptake ◽  
Phosphate Fertilizer ◽  
Residual Effects ◽  
Substantial Contribution ◽  
Field Bean ◽  
N Nutrition ◽  
Legume Crop

SummaryImproved management compared with traditional practices common in northern Syria for growing field bean (Vicia faba L.), chickpea (Cicer arietinum), lentil (Lens culinaris), peas (Pisum sativum) and vetch (Vicia sativa) was shown to increase significantly (P < 0·001) the crop nitrogen (N) uptake and subsequent protein yields in either hay, grain or straw. This intervention more than doubled N uptake in 1982–3 when averaged over crops and locations increasing from 31·8 kg N/ha under traditional management to 68·7 kg N/ha under improved management. Improved management also increased the proportion of nitrogen uptake that was derived from symbiotic nitrogen fixation by the crop from 55 to 69%. The treatments which gave improved crop N uptake were application of phosphate fertilizer, reduced row spacing and control of weeds. Seed inoculation with rhizobia had little or no effect on N uptake or on the proportion of N that was fixed biologically by the crop. Environmental effects on productivity, as expressed by seasonal and locational differences, were as, or more, important than management-imposed effects.Differences in N uptake by barley, following either a legume crop or barley, indicated that the residual effects of the legume crop amounted to approximately 10 kg N/ha. This represents a substantial contribution to the N nutrition of a barley crop in the dry areas of northern Syria.

Effect of low static nitrate concentrations on mineral nitrogen uptake, nodulation, and nitrogen fixation in field pea

1993 ◽  
Vol 16 (9) ◽  
pp. 1775-1789 ◽  
Author(s):  
John G. Waterer ◽  
J. Kevin Vessey
Keyword(s):  
Nitrogen Fixation ◽  
Nitrogen Uptake ◽  
Mineral Nitrogen ◽  
Field Pea ◽  
Nitrate Concentrations
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