scholarly journals Determination of the effects of tillage on the productivity of a sandy loam soil using soil productivity models

2021 ◽  
Vol 67 (No. 3) ◽  
pp. 108-115
Author(s):  
Tanko Bako ◽  
Ezekiel Ambo Mamai ◽  
Istifanus Akila Bardey
Keyword(s):  
Organic Matter ◽  
Iron Oxide ◽  
Bulk Density ◽  
Aluminium Oxide ◽  
Available Phosphorus ◽  
Soil Productivity ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity ◽  
Tillage Methods

Based on the hypothesis that soil properties and productivity components should be affected by different tillage methods, field and laboratory experiments were conducted to study the effects of zero tillage (ZT), one pass of disc plough tillage (P), one pass of disc plough plus one pass of disc harrow tillage (PH) and one pass of disc plough plus two passes of disc harrow tillage (PHH) on the distribution of the bulk density, available water capacity, pH, organic matter, available phosphorus, iron oxide and aluminium oxide at different soil depths, and their effects on the soil productivity. The available water capacity, pH, organic matter and available phosphorus were found to increase with the degree of tillage, while the bulk density, iron oxide and aluminium oxide were found to decrease with the degree of tillage. The results show that the soil productivity index was significantly (P ≤ 0.05) affected by the tillage methods and found to increase with the degree of tillage.

Impact of Land Management on Available Water Capacity of Peat Soil

2021 ◽  
Author(s):  
Haojie Liu ◽  
Franziska Tanneberger ◽  
Bernd Lennartz
Keyword(s):  
Bulk Density ◽  
Soil Degradation ◽  
Soil Depth ◽  
Peat Soil ◽  
Regional Scale ◽  
Organic Matter Content ◽  
Matter Content ◽  
Water Capacity ◽  
Available Water ◽  
Available Water Capacity

<p>In Central Europe, about 90% of fen peatlands have been drained for agriculture and forestry leading to greenhouse gas emissions and soil degradation. Soil available water capacity (AWC) is one of the most important soil properties regulating the water balance at a given site and plays, thus, a pivotal role in plant growth. Compared with that of mineral substrates, our understanding of the AWC of peat is limited. In this study, we aimed to deduce possible alterations of the AWC of peat following soil degradation. We analysed a comprehensive database (674 measurements from boreal and temperate peatlands) to seek relations between bulk density (BD) and total porosity, field capacity, wilting point, and AWC. Bulk density was used as a proxy for peat degradation as it is closely correlated with the soil organic matter content. The AWC increases gradually with BD up to a value of 0.2 g cm<sup>−3</sup>; a further increase in BD leads to a considerable decrease in AWC. The increase in AWC occurs within the first 15 to 30 years of land drainage, depending on the initial soil BD before drainage. The function between BD and AWC enables us to upscale the AWC to a regional scale. The average AWC of agricultural peatlands in Germany is estimated to be 37 ± 11 vol% (mean ± standard deviation). In Germany, the AWC decreases with increasing soil depth for highly degraded peatlands, which are characterised by BD values of 0.4 g cm<sup>−3</sup> > BD > 0.2 g cm<sup>−3</sup>. However, for extremely degraded peatlands (BD > 0.4 g cm<sup>−3</sup>), the AWC increases with increasing soil depth. For those highly and extremely degraded peatlands, we estimated that 1 wt% organic carbon loss causes a drop of 1.25 vol% in AWC. Peatland rewetting may increase soil AWC, however, plants may still suffer from a water deficit under extreme dry weather conditions.</p>

scholarly journals Influence of prolonged disposal of municipal solid waste on soil productivity factors

2019 ◽  
Vol 11 (4) ◽  
pp. 816-822
Author(s):  
Sandeep Gupta
Keyword(s):  
Organic Matter ◽  
Solid Waste ◽  
Bulk Density ◽  
Control Site ◽  
Municipal Waste ◽  
Raw Material ◽  
Available Phosphorus ◽  
Soil Productivity ◽  
Mountain Range ◽  
Productivity Factors

The prolonged disposal of municipal waste influences the soil productivity factors. Therefore, the present study was carried out at dumping site near Chandi bridge Hardwar (Uttarakhand) to determine the effect of physico-chemical parameters of the solid waste on soil productivity factors of soil at different sites-  Site-A: It was near to slump area. Site-B (500 meter far from site-A: It was used for dumping and partially submerged with water and had a swampy condition, Site-C (500 meter far from site-B): It was near to Chandi devi ropeway and contained fresh as well as partially decomposed waste. Site- D and Site-E (500 meter far from site-C): It was used for dumping and had putrefied odour due to decomposition of fresh waste. The control site- X (Bilkeshwar mountain region): 10 Km far from experimental sites in N-W direction of Chandi bridge municipal waste dumping area at Hardwar (Uttarakhand), India during the year 2006-2009 at present these sites have been closed for dumping of waste. The soil productivity factors viz. available nitrogen (0.32 ppm), organic matter (0.89%) were found maximum at site-A, temperature (24.610C) at site-C and electrical conductivity (1.05 dSM-1) available phosphorus (33.16ppm), available potash (260.17ppm) at site-E of dumping area in comparison to the soil of control site-X (Bilkeshwar mountain range). At control site, bulk density (1.37 g/cc) and pH (7.65) were maximum while the bulk density (1.08 ± 0.22) g/cc at site-D and pH (7.02) at site-E were observed minimum. The results were statistically analyzed to indicate that the dumping of municipal waste influenced the pH and bulk density of soil and increased the acidity and porosity of soil through which pollutants leach to ground water. But higher amount of organic matter, N, P, K makes it fit for the raw material that may be used in fertilizing industries by using appropriate technologies. The study would be helpful for utilization of  municipal wastes   in compost formation and to indicate the influence of municipal waste on soil quality of the dumping sites of other places. 

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