Geostatistical Analysis and Risk Assessment on Soil Total Nitrogen and Total Soil Phosphorus in the Dongting Lake Plain Area, China

2007 ◽  
Vol 36 (4) ◽  
pp. 935-942 ◽  
Author(s):  
Peng Lu ◽  
Yirong Su ◽  
Zheng Niu ◽  
Jinshui Wu
Keyword(s):  
Risk Assessment ◽  
Total Nitrogen ◽  
Soil Phosphorus ◽  
Dongting Lake ◽  
Geostatistical Analysis ◽  
Soil Total Nitrogen ◽  
Plain Area ◽  
Total Soil ◽  
Total Soil Phosphorus

Prediction of yield responses to phosphorus by established Greenleaf desmodium/grass pastures in south-east Queensland using chemical tests

1980 ◽  
Vol 20 (105) ◽  
pp. 477
Author(s):  
GE Rayment ◽  
RC Bruce ◽  
BG Cook
Keyword(s):  
Soil Phosphorus ◽  
Residual Variance ◽  
Total Soil ◽  
Plant Chemical ◽  
Diagnostic Samples ◽  
Total Soil Phosphorus ◽  
Independent Variable ◽  
Phosphorus Status ◽  
Yield Responses ◽  
Phosphorus Levels

Phosphorus topdressing experiments (rates to 60 kg P ha-1) on 18 commercial Desmodium intortum cv. Greenleaf/grass pastures were conducted over a 4-year period in south-east Queensland. The aim was to determine whether yield responses, which occurred only in the Greenleaf component at six sites, could be predicted using soil or plant chemical tests. Acid-(0.005 M H2SO4) and bicarbonate-(0.5 M NaHCO3) extractable tests of phosphorus status in 0-10 cm soil samples each explained about 60% of the variance in Greenleaf relative yields. The residual variance was not significantly reduced by the inclusion of terms for total soil nitrogen, total soil phosphorus, exchangeable calcium and pH into the independent variable. These empirical soil phosphorus tests had higher predictive value than plant tests based on phosphorus concentrations in tops and diagnostic samples of Greenleaf. With both acid- and bicarbonate-extractable phosphorus, yield responses are likely in the Greenleaf component when phosphorus levels in most soils are below 22 ppm. Above 29 ppm, no response would be expected

scholarly journals Impact of Plant Invasion and Increasing Floods on Total Soil Phosphorus and its Fractions in the Minjiang River Estuarine Wetlands, China

Wetlands ◽  
2015 ◽  
Vol 36 (1) ◽  
pp. 21-36 ◽  
Author(s):  
Wei-Qi Wang ◽  
Jordi Sardans ◽  
Cong-Sheng Zeng ◽  
Chuan Tong ◽  
Chun Wang ◽  
...  
Keyword(s):  
Plant Invasion ◽  
Soil Phosphorus ◽  
Estuarine Wetlands ◽  
Minjiang River ◽  
Total Soil ◽  
Total Soil Phosphorus ◽  
River Estuarine

Geostatistical Analysis of Soil Total Nitrogen in Natural and Secondary Forests of Changbai Mountain, China

2012 ◽  
Vol 11 (1) ◽  
pp. 106-109
Author(s):  
Y. L. Wang ◽  
M. Zhang ◽  
X. K. Zhang ◽  
X. G. Wang ◽  
W. J. Liang
Keyword(s):  
Total Nitrogen ◽  
Geostatistical Analysis ◽  
Changbai Mountain ◽  
Secondary Forests ◽  
Soil Total Nitrogen

Laboratory Validation of Soil Phosphorus Storage Capacity Predictions for Use in Risk Assessment

2007 ◽  
Vol 71 (5) ◽  
pp. 1564-1569 ◽  
Author(s):  
M. Chrysostome ◽  
V. D. Nair ◽  
W. G. Harris ◽  
R. D. Rhue
Keyword(s):  
Risk Assessment ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Storage
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