Regional hybrid geospatial modeling of soil nitrate–nitrogen in the Santa Fe River Watershed

Geoderma ◽  
2006 ◽  
Vol 135 ◽  
pp. 233-247 ◽  
Author(s):  
S. Lamsal ◽  
S. Grunwald ◽  
G.L. Bruland ◽  
C.M. Bliss ◽  
N.B. Comerford
Keyword(s):  
Nitrate Nitrogen ◽  
Soil Nitrate ◽  
Santa Fe ◽  
Geospatial Modeling ◽  
River Watershed ◽  
Santa Fe River ◽  
Santa Fe River Watershed

Fallow management, soil water, plant-available soil nitrogen and grain sorghum production in south west Queensland

1992 ◽  
Vol 32 (4) ◽  
pp. 473 ◽  
Author(s):  
G Gibson ◽  
BJ Radford ◽  
RGH Nielsen
Keyword(s):  
Soil Water ◽  
Nitrate Nitrogen ◽  
Soil Nitrate ◽  
Zero Tillage ◽  
Fallow Management ◽  
South West ◽  
Primary Tillage ◽  
Grain Nitrogen ◽  
Texture Contrast ◽  
Gypsum Application

The effects of tillage frequency (conventional, reduced and zero), primary tillage implement (disc, blade and chisel plough), stubble management (retention and removal), gypsum application, and paraplowing were examined with respect to soil water storage, soil nitrate accumulation, crop establishment, crop growth, grain yield and grain nitrogen content for 4 successive sorghum crops on a sodic, texture-contrast soil in south west Queensland. Retention of sorghum stubble (v. removal) produced an increase in mean yield of sorghum grain of 393 kg/ha, due to increased soil water extraction and increased water use efficiency by the following crop. The highest mean yield occurred after reduced blade tillage with stubble retained. Zero tillage with stubble removed gave the lowest mean grain yield. Zero tillage always had the lowest quantity of soil nitrate-nitrogen at sowing. In one fallow, increased aggressiveness of primary tillage (disc v. blade plough) increased the quantity of nitrate-nitrogen in the top 60 cm of soil at sowing. These effects on available soil nitrogen did not result in corresponding differences in grain nitrogen content. Results indicate that for optimum fallow management on this texture-contrast soil in south west Queensland, sorghum residues should be retained, tillage frequency should be reduced, but not to zero, blade ploughing should be preferred to discing, and gypsum application should not be practised.

Nodulating and Non-Nodulating Soybean Rotation Influence on Soil Nitrate-Nitrogen and Water, and Sorghum Yield

2007 ◽  
Vol 99 (3) ◽  
pp. 599-606 ◽  
Author(s):  
Nanga Mady Kaye ◽  
Stephen C. Mason ◽  
Tomie D. Galusha ◽  
Martha Mamo
Keyword(s):  
Nitrate Nitrogen ◽  
Soil Nitrate

The Effect of Human Activity on the Distribution of Soil Nitrate Nitrogen in Unsaturated Zone

2013 ◽  
Vol 790 ◽  
pp. 202-205
Author(s):  
Hui Yan Gao ◽  
Lu Hua Yang ◽  
Tian Li ◽  
Zi Peng Guo
Keyword(s):  
Soil Moisture ◽  
Nitrogen Content ◽  
Human Activity ◽  
Soil Profile ◽  
Nitrate Nitrogen ◽  
Root Zone ◽  
Deep Layer ◽  
Soil Layer ◽  
Growth Period ◽  
Soil Nitrate

Soil moisture and nitrate nitrogen were measured respectively in planting area and non-planting area in RANZHUANG experiment station from 2011 to 2012. The effect of human activity on soil moisture and nitrate nitrogen was analyzed. The results show that soil moisture content varies from 8.61% to 30.09% within 0~250cm depth and is tended to be stable below 250cm deep layer in non-planting area. The distribution of soil nitrate nitrogen is a single peak curve, the peak moves downward at a speed of 0.81cm/d in percolation of rainfall. Soil moisture varies form 21.23% to 41.67% within 0~400cm depth and is tended to be stable below 400cm deep layer in planting area. Nitrate nitrogen is mainly accumulated at 0~100cm deep soil layer in the wheat growth period. In the maize growth period, the distribution of nitrate nitrogen is double peak curve in 0~500cm soil profile. The upper peak occurs at 40~100cm soil layer, the peak of nitrate nitrogen content is between 26.7~54.6mg/kg; the lower emerges at 150~260cm soil profile, the value is between 36.7~106.36mg/kg. Deep percolation of the nitrate nitrogen is obvious due to unreasonable irrigation and fertilization. The nitrate nitrogen content accounts for 52.3% of the total nitrate nitrogen below the root zone soil, which is a potential contamination source of groundwater.

A tree-ring reconstruction of streamflow in the Santa Fe River, New Mexico

2011 ◽  
Vol 397 (1-2) ◽  
pp. 118-127 ◽  
Author(s):  
Ellis Q. Margolis ◽  
David M. Meko ◽  
Ramzi Touchan
Keyword(s):  
New Mexico ◽  
Tree Ring ◽  
Santa Fe ◽  
Santa Fe River ◽  
Tree Ring Reconstruction

scholarly journals Discovery of South American suckermouth armored catfishes (Loricariidae, Pterygoplichthys spp.) in the Santa Fe River drainage, Suwannee River basin, USA

2012 ◽  
Vol 1 (3) ◽  
pp. 179-200 ◽  
Author(s):  
Leo Nico ◽  
Peter Butt ◽  
Gerald Johnston ◽  
Howard Jelks ◽  
Matthew Kail ◽  
...  
Keyword(s):  
River Basin ◽  
South American ◽  
Santa Fe ◽  
River Drainage ◽  
Suwannee River ◽  
Santa Fe River
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