scholarly journals Urbanization Leads to Increases in pH, Carbonate, and Soil Organic Matter Stocks of Arable Soils of Kumasi, Ghana (West Africa)

Author(s):  
Stephen Boahen Asabere ◽  
Thorsten Zeppenfeld ◽  
Kwabena Abrefa Nketia ◽  
Daniela Sauer
2011 ◽  
Vol 174 (4) ◽  
pp. 576-586 ◽  
Author(s):  
Sabine Heumann ◽  
André Schlichting ◽  
Jürgen Böttcher ◽  
Peter Leinweber

2018 ◽  
Vol 2 (95) ◽  
pp. 55-62
Author(s):  
V.M. Polovyi ◽  
Т.М. Kolesnyk

The peculiarities of agricultural production organization in Ukraine, which are found of the land fund and agricultural lands non-balanced structure is halping to soil erosion losses an increasing by 2,3 times and soil dehumidification at the level of 0,203 t / ha. Transformation of Ukrainian crop areas structure for the period 1990-2016 was helped to an increasing of the arable land erosion hazard coefficient from 0,44 to 0,56, which provokes loss of soil organic matter by 27,3%. The transformation of Ukrainian crop areas structure by decreasing the share of cutting-edge crops has reduced the soil organic matter ballance deficit in arable soils by 72 % (+ 0,28 t / ha), the effect of which decreased by 2,14 times due to a decreasing of arable land with organic fertilization. The unbalanced supply of nutrient-fertilizing elements to the arable land of Ukraine, the limiting factor of which is the narrow C: N ratio, which is lower than the optimal by 2,48 times, is an additional important factor of accelerating arable soils dehumidification.


2007 ◽  
Vol 94 (1) ◽  
pp. 64-74 ◽  
Author(s):  
Elisée Ouédraogo ◽  
Abdoulaye Mando ◽  
Lijbert Brussaard ◽  
Leo Stroosnijder

1930 ◽  
Vol 20 (3) ◽  
pp. 348-354 ◽  
Author(s):  
W. McLean

1. The average carbon-nitrogen ratio for fifty British soils from widely distributed areas approximates to the figure 10: 1 given by other investigators. The range of variation is from 6·5 to 13·5: 1. Sixteen foreign samples gave C/N ratios varying from 2·0 to 23·0: 1.2. Soils from limited areas, whether high or low in organic carbon, give approximately constant ratios, but these ratios vary from place to place according to soil, climate, etc. It is suggested that the C/N ratios may be specific.3. The C/N ratios of arable soils do not differ appreciably from those of grassland soils. The percentages of carbon and nitrogen are somewhat higher in the grassland samples than in the arable samples.


2008 ◽  
Vol 54 (4) ◽  
pp. 343-351 ◽  
Author(s):  
Jaromir Kubát ◽  
Jitka Novakova ◽  
Michaela Friedlova ◽  
Barbora Frydova ◽  
Dana Cerhanova ◽  
...  

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