Leaf and root nutrient concentrations and stoichiometry along aridity and soil fertility gradients

2019 ◽  
Vol 30 (2) ◽  
pp. 291-300 ◽  
Author(s):  
Guofang Liu ◽  
Xuehua Ye ◽  
Zhenying Huang ◽  
Ming Dong ◽  
Johannes H. C. Cornelissen
Keyword(s):  
Soil Fertility ◽  
Nutrient Concentrations ◽  
Soil Fertility Gradients

scholarly journals Inter‐community and on‐farm asymmetric organic matter allocation patterns drive soil fertility gradients in a rural Andean landscape

2020 ◽  
Vol 31 (18) ◽  
pp. 2973-2985
Author(s):  
Mark E. Caulfield ◽  
Steven J. Fonte ◽  
Pablo Tittonell ◽  
Steven J. Vanek ◽  
Stephen Sherwood ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Soil Fertility Gradients ◽  
Allocation Patterns ◽  
On Farm

Assessment of Household Waste, Poultry Manure and Cowdung in Rice Cultivation

1970 ◽  
Vol 8 (2) ◽  
pp. 117-125 ◽  
Author(s):  
Md Mizanur Rahman
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Poultry Manure ◽  
Maximum Sustainable Yield ◽  
Organic Wastes ◽  
Household Waste ◽  
Nutrient Concentrations ◽  
Cow Dung ◽  
Rice Grain ◽  
Randomized Design

The pot experiment was carried out to quantify the effect of different organic wastes in rice yield and to determine the effect on soil fertility. The experiment was laid down in a complete randomized design taking 11 treatments with three replicates. The applied treatments were; (1) Control, (2) Recommended doses of NPK, (3) HW 10%, (4) HW 20%, (5) HW 30%, (6) PM 10%, (7) PM 20%, (8) PM: 30%, (9) CD 10%, (10) CD 20% and (11) CD 30%. Application of 30% household waste produced the significantly higher grain yield (58.94 g pot-1) even over the recommended doses of N, P and K (p≤0.05). The maximum sustainable yield index (SYI) was found 0.91 when 10% poultry manure and 30% cow dung were applied. But the SYI was 0.67 when 30% HW was applied. However, before approaching to a conclusion on SYI, it demands a long time field experiment using these organic wastes. Nutrient concentrations in rice crop/grains were not affected by the application of organic wastes, except P content in grain. The concentrations of N, P and K in rice grain varied 1.79 - 2.12, 0.14 - 0.21, and 1.44-1.99%, respectively. A significant nonlinear relationship was found between grain yield and N, P and K uptake individually. Post harvest chemical analysis of pot soil indicated that OM, N and P contents in soils significantly increased over the control which indicated the enhancement of soil fertility with the application of different organic wastes. The highest application rates of organic wastes attributed to maximum accumulation of organic matter and nitrogen in soil. Keywords: Household waste; poultry manure; cowdung; rice; nutrient uptake DOI: 10.3329/agric.v8i2.7585 The Agriculturists 8(2): 117-125 (2010)  

Nutrient fluxes in litterfall and decomposition in four forests along a gradient of soil fertility in southern Ohio

1984 ◽  
Vol 14 (6) ◽  
pp. 794-802 ◽  
Author(s):  
Ralph E. J. Boerner
Keyword(s):  
Soil Fertility ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Nutrient Concentrations ◽  
Strongly Correlated ◽  
Nitrogen And Phosphorus ◽  
Soil Nutrient Availability ◽  
Nutrient Mineralization ◽  
Nutrient Levels ◽  
Fertility Gradient

To determine how soil nutrient availability influences nutrient cycling, fluxes of nutrients through litterfall and decomposition were determined for four forest stands similar in all respects except soil nutrient availability and microclimate, within Neotoma Valley, a small watershed in southern Ohio, U.S.A. Litterfall varied from 10 to 60% among sites while nutrient concentrations and masses in new leaf litter varied as a function of extractable soil nutrient levels. Mass loss from litterbags was significantly higher in more fertile sites. Stepwise regression indicated that initial litter nitrogen and phosphorus concentrations were strongly correlated with relative decomposition rate while lignin concentration and microclimate variables were only correlated weakly. Thus, both litterfall nutrient transfers and decomposition rates were under the control of soil nutrient levels. Nitrogen was immobilized in litter at all sites during the 1st year of decay; litter from more fertile sites mineralized nitrogen during the 2nd year, while that from less fertile sites continued to immobilize nitrogen. Phosphorus and calcium mineralization rates were strongly correlated with the availability of these elements in the soil. Magnesium and potassium were leached rapidly from litter; amounts mineralized were correlated with amounts in litterfall. Interrelations among soil fertility, litterfall, and nutrient mineralization, as well as litter redistribution, are discussed as processes important in the development and maintenance of the soil fertility gradient in this watershed.

Comparative effects of Acacia albida and Kigelia africana trees on soil characteristics in Zambezi riverine woodlands

1991 ◽  
Vol 7 (2) ◽  
pp. 215-220 ◽  
Author(s):  
Kevin M. Dunham
Keyword(s):  
Soil Fertility ◽  
Soil Nutrient ◽  
Soil Characteristics ◽  
Nutrient Concentrations ◽  
Soil P ◽  
P Concentration ◽  
Tree Canopies ◽  
Acacia Albida

ABSTRACTSoil nutrient concentrations under Acacia albida and Kigelia africana trees growing in Zambezi riverine woodlands were compared with soils in the open, beyond tree canopies. Concentrations of N, C, P and K were higher under tree canopies. Concentrations of Ca and Mg were unchanged. Soils were slightly more acid under A. albida trees relative to open soil, but were less acid under K. africana. Soil P concentration was higher under K. africana than under A. albida. Otherwise, the two species had similar effects on soil fertility. Despite previous claims, A. albida is probably no more efficient at increasing soil fertility than other savanna trees.

Soil fertility gradients shape the agrobiodiversity of Amazonian homegardens

2016 ◽  
Vol 221 ◽  
pp. 270-281 ◽  
Author(s):  
A.B. Junqueira ◽  
N.B. Souza ◽  
T.J. Stomph ◽  
C.J.M. Almekinders ◽  
C.R. Clement ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Soil Fertility Gradients
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