Amycolatopsis minnesotensis sp. nov., isolated from a prairie soil

Populations of two Rhizobium strains (NGR8 and CB81) in the rhizosphere of Leucaena leucocephala were estimated in field experiments with varying levels of antibiotically marked strains as seed inoculation treatments. The population level varied with soil type and strain of Rhizobium. Multiplication in the rhizosphere was very slow in a prairie soil but was more rapid in a sandy podzolic soil and nodulation was three weeks earlier in the sandy soil than in the prairie soil. Survival of these two strains in soil stored in the laboratory also suggested that they (especially NGR8) were not well suited to the prairie soil. Nodule representation of strain CB81 on the prairie soil decreased from 100% three months after sowing to between 12% and 16% two years after sowing. The results suggest that on this soil indigenous rhizobia form effective nitrogen fixing associations with Leucaena leucocephala and that any improvement in nitrogen fixation will require strains of Rhizobium that are more effective than the indigenous strains and better competitors for nodule formation.

Download Full-text

Pipeline Impacts and Recovery of Dry Mixed-Grass Prairie Soil and Plant Communities

Rangeland Ecology & Management ◽

10.1016/j.rama.2020.06.003 ◽

2020 ◽

Vol 73 (5) ◽

pp. 619-628

Author(s):

M. Anne Naeth ◽

David A. Locky ◽

Sarah R. Wilkinson ◽

Meghan R. Nannt ◽

Candace L. Bryks ◽

...

Keyword(s):

Plant Communities ◽

Mixed Grass Prairie ◽

Prairie Soil ◽

Mixed Grass

Download Full-text

Tallgrass prairie soil fungal communities are resilient to climate change

Fungal Ecology ◽

10.1016/j.funeco.2013.11.003 ◽

2014 ◽

Vol 10 ◽

pp. 44-57 ◽

Cited By ~ 24

Author(s):

Ari Jumpponen ◽

Kenneth L. Jones

Keyword(s):

Climate Change ◽

Tallgrass Prairie ◽

Fungal Communities ◽

Prairie Soil

Download Full-text

Pseudogley in Gundaroo Subsola, Southern Tablelands, New South Wales

Soil Research ◽

10.1071/sr9690143 ◽

1969 ◽

Vol 7 (2) ◽

pp. 143 ◽

Cited By ~ 8

Author(s):

Dijk DC Van

Keyword(s):

New South ◽

New South Wales ◽

Soil Layer ◽

South Wales ◽

Prairie Soil ◽

Red Earth

The genesis is discussed of a range of pedological differentiations which occur unusually deep in the soil and characterize low, but not the lowest, catenary segments of the Gundaroo pedomorpholith. This soil layer forms a large part of the soil mantle on the Southern Tablelands and is of considerable age. The deep-seated differentiations have developed as separate 'accessory' features below red-yellow and meadow podzolic, prairie soil, and red-earth sola of normal depth (2-4 ft). The zone in which they occur is termed the 'subsolum'. The features are dominated by vertical patterns related to planar and tubular voids. They include, besides a range of sesquioxidic forms, conspicuous clay differentiations comprising pronounced cutans and up to 1-1 1/2 in. wide vertical clay veins and well-developed pedality with thick colloid coatings. These features are believed to represent 'descendant' pseudogley and to be related to an unusually dynamic palaeoclimatic regime.

Download Full-text

Studies in tropical soils: IV. Organic transformations in soils, composts and peat

The Journal of Agricultural Science ◽

10.1017/s0021859600051121 ◽

1937 ◽

Vol 27 (2) ◽

pp. 162-177 ◽

Cited By ~ 4

Author(s):

D. W. Duthie

Keyword(s):

Clay Soil ◽

Tropical Soils ◽

Tropical Soil ◽

Soil Samples ◽

Organic Transformations ◽

Surface Layers ◽

Prairie Soil ◽

Nitrogenous Substances ◽

Chemical Characters ◽

Organic Decomposition

1. Waksman's simplified scheme of fractionation was used in attempts to trace the organic transformations occurring in some tropical samples of composts, soils and peats.2. It was found that a useful partition of the nitrogenous substances into hydrolysable and resistant fractions could be effected by boiling with 5 per cent sulphuric acid for 6 hours.3. Two profile layers of a black calcareous Trinidadian clay soil were compared with two horizons of a prairie soil examined by Waksman & Stevens. The surface layers of both soils were found to be similar in chemical characters, but the lower subsoil layers of the Trinidadian soil gave evidence of a more advanced and profound degree of organic decomposition.4. Serial soil samples, taken from eight undisturbed natural profiles representative of humid tropical soil types occurring in Jamaica and Trinidad, were similarly examined.

Download Full-text