scholarly journals Pedotransfer functions for Irish soils – estimation of bulk density (ρ<sub>b</sub>) per horizon type

2015 ◽  
Vol 2 (2) ◽  
pp. 1039-1074
Author(s):  
B. Reidy ◽  
I. Simo ◽  
P. Sills ◽  
R. E. Creamer
Keyword(s):  
Bulk Density ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Soil Profiles ◽  
Gap Filling ◽  
Soil Carbon Stock ◽  
Packing Structure ◽  
The Core ◽  
Core Method ◽  
Density Map

Abstract. Soil bulk density is a key property in defining soil characteristics. It describes the packing structure of the soil and is also essential for the measurement of soil carbon stock and nutrient assessment. In many older surveys this property was neglected and in many modern surveys this property is omitted due to cost both in laboratory and labour and in cases where the core method cannot be applied. To overcome these oversights pedotransfer functions are applied using other known soil properties to estimate bulk density. Pedotransfer functions have been derived from large international datasets across many studies, with their own inherent biases, many ignoring horizonation and depth variances. Initially pedotransfer functions from the literature were used to predict different horizon types using local known bulk density datasets. Then the best performing of the pedotransfer functions, were selected to recalibrate and then were validated again using the known data. The predicted co-efficient of determination was 0.5 or greater in 12 of the 17 horizon types studied. These new equations allowed gap filling where bulk density data was missing in part or whole soil profiles. This then allowed the development of an indicative soil bulk density map for Ireland at 0–30 and 30–50 cm horizon depths. In general the horizons with the largest known datasets had the best predictions, using the recalibrated and validated pedotransfer functions.

scholarly journals Pedotransfer functions for Irish soils – estimation of bulk density (<i>ρ</i><sub>b</sub>) per horizon type

SOIL ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 25-39 ◽  
Author(s):  
B. Reidy ◽  
I. Simo ◽  
P. Sills ◽  
R. E. Creamer
Keyword(s):  
Bulk Density ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Data Sets ◽  
Density Data ◽  
Soil Carbon Stock ◽  
Packing Structure ◽  
Core Method ◽  
International Data ◽  
Density Map

Abstract. Soil bulk density is a key property in defining soil characteristics. It describes the packing structure of the soil and is also essential for the measurement of soil carbon stock and nutrient assessment. In many older surveys this property was neglected and in many modern surveys this property is omitted due to cost both in laboratory and labour and in cases where the core method cannot be applied. To overcome these oversights pedotransfer functions are applied using other known soil properties to estimate bulk density. Pedotransfer functions have been derived from large international data sets across many studies, with their own inherent biases, many ignoring horizonation and depth variances. Initially pedotransfer functions from the literature were used to predict different horizon type bulk densities using local known bulk density data sets. Then the best performing of the pedotransfer functions were selected to recalibrate and then were validated again using the known data. The predicted co-efficient of determination was 0.5 or greater in 12 of the 17 horizon types studied. These new equations allowed gap filling where bulk density data were missing in part or whole soil profiles. This then allowed the development of an indicative soil bulk density map for Ireland at 0–30 and 30–50 cm horizon depths. In general the horizons with the largest known data sets had the best predictions, using the recalibrated and validated pedotransfer functions.

scholarly journals Quantifying Soil Compaction in Persimmon Orchards Using ISUM (Improved Stock Unearthing Method) and Core Sampling Methods

Agriculture ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 266 ◽  
Author(s):  
Ehsan Moradi ◽  
Jesús Rodrigo-Comino ◽  
Enric Terol ◽  
Gaspar Mora-Navarro ◽  
Alexandre Marco da Silva ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Soil Erosion ◽  
Bulk Density ◽  
Soil Compaction ◽  
Structural Changes ◽  
Low Cost ◽  
Positive Contribution ◽  
The Core ◽  
Core Sampling ◽  
Core Method

Agricultural activities induce micro-topographical changes, soil compaction and structural changes due to soil cultivation, which directly affect ecosystem services. However, little is known about how these soil structural changes occur during and after the planting of orchards, and which key factors and processes play a major role in soil compaction due to cultivation works. This study evaluates the improved stock unearthing method (ISUM) as a low-cost and precise alternative to the tedious and costly traditional core sampling method, to characterize the changes in soil compaction in a representative persimmon orchard in Eastern Spain. To achieve this goal, firstly, in the field, undisturbed soil samples using metallic core rings (in January 2016 and 2019) were collected at different soil depths between 45 paired-trees, and topographic variations were determined following the protocol established by ISUM (January 2019). Our results show that soil bulk density (Bd) increases with depth and in the inter-row area, due to the effect of tractor passes and human trampling. The bulk density values of the top surface layers (0–12 cm) showed the lowest soil accumulation, but the highest temporal and spatial variability. Soil consolidation within three years after planting as calculated using the core samples was 12 mm, whereas when calculated with ISUM, it was 14 mm. The quality of the results with ISUM was better than with the traditional core method, due to the higher amount of sampling points. The ISUM is a promising method to measure soil compaction, but it is restricted to the land where soil erosion does not take place, or where soil erosion is measured to establish a balance of soil redistribution. Another positive contribution of ISUM is that it requires 24 h of technician work to acquire the data, whereas the core method requires 272 h. Our research is the first approach to use ISUM to quantify soil compaction and will contribute to applying innovative and low-cost monitoring methods to agricultural land and conserving ecosystem services.

Pedotransfer Functions for Estimating Soil Bulk Density in China

Soil Science ◽  
2012 ◽  
Vol 177 (3) ◽  
pp. 158-164 ◽  
Author(s):  
Guang-Zhong Han ◽  
Gan-Lin Zhang ◽  
Zi-Tong Gong ◽  
Gai-Fen Wang
Keyword(s):  
Bulk Density ◽  
Soil Bulk Density ◽  
Pedotransfer Functions

scholarly journals Comparison of different models for predicting soil bulk density. Case study – Slovakian agricultural soils

2017 ◽  
Vol 31 (4) ◽  
pp. 491-498 ◽  
Author(s):  
Jarmila Makovníková ◽  
Miloš Širáň ◽  
Beata Houšková ◽  
Boris Pálka ◽  
Arwyn Jones
Keyword(s):  
Organic Carbon ◽  
Bulk Density ◽  
Monitoring System ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Research Centre ◽  
Organic Carbon Content ◽  
Joint Research ◽  
Data Set ◽  
Sustainable Resources

Abstract Soil bulk density is one of the main direct indicators of soil health, and is an important aspect of models for determining agroecosystem services potential. By way of applying multi-regression methods, we have created a distributed prediction of soil bulk density used subsequently for topsoil carbon stock estimation. The soil data used for this study were from the Slovakian partial monitoring system-soil database. In our work, two models of soil bulk density in an equilibrium state, with different combinations of input parameters (soil particle size distribution and soil organic carbon content in %), have been created, and subsequently validated using a data set from 15 principal sampling sites of Slovakian partial monitoring system-soil, that were different from those used to generate the bulk density equations. We have made a comparison of measured bulk density data and data calculated by the pedotransfer equations against soil bulk density calculated according to equations recommended by Joint Research Centre Sustainable Resources for Europe. The differences between measured soil bulk density and the model values vary from −0.144 to 0.135 g cm−3 in the verification data set. Furthermore, all models based on pedotransfer functions give moderately lower values. The soil bulk density model was then applied to generate a first approximation of soil bulk density map for Slovakia using texture information from 17 523 sampling sites, and was subsequently utilised for topsoil organic carbon estimation.

Soil bulk density pedotransfer functions of the humus horizon in arable soils

Geoderma ◽  
2011 ◽  
Vol 163 (1-2) ◽  
pp. 74-82 ◽  
Author(s):  
Elsa Suuster ◽  
Christian Ritz ◽  
Hugo Roostalu ◽  
Endla Reintam ◽  
Raimo Kõlli ◽  
...  
Keyword(s):  
Bulk Density ◽  
Humus Horizon ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Arable Soils

scholarly journals Assessment of soil carbon stock of some selected agroecological zones of Bangladesh

2014 ◽  
Vol 38 (4) ◽  
pp. 625-635 ◽  
Author(s):  
PK Saha ◽  
MS Rahman ◽  
M Khatun ◽  
ATMS Hossain ◽  
MA Saleque
Keyword(s):  
Bulk Density ◽  
Soil Depth ◽  
Soil Bulk Density ◽  
Piedmont Plain ◽  
Soil Carbon Stock ◽  
Agroecological Zones ◽  
Soc Stock ◽  
Land Types ◽  
Brahmaputra Floodplain ◽  
Soc Stocks

The present investigation assessed the soil organic carbon (SOC) stocks of four AEZs in Bangladesh which included AEZ 1 (Old Himalayan Piedmont Plain), AEZ 3 (Tista Meander Floodplain), AEZ 4 (Karatoya-Bangali Floodplain), and AEZ 9 (Old Brahmaputra Floodplain). Three land types – high land (HL), medium high and (MHL) and low and (LL) – were considered in the SOC assessment. The SOC stock was estimated by multiplying SOC (%) with bulk density (g/cc) and soil depth (cm). Across the AEZs and land types, the SOC (%) decreased with the increase in soil depth. The SOC (%) was the highest in the low land and the lowest in the high land over the AEZs. The soil bulk density in every AEZ increased with soil depth. Bulk density of soil for medium high and varied from 1.26 g/cc to 1.67 g/cc, for high and from 1.33 g/cc to 1.55 g/cc, and for low land it was 1.13 g/cc to 1.44 g/cc. The SOC stock at 0-20 cm depth was higher (14.19-4.67 t/ha) in low land followed by medium high land (8.25-4.58 t/ha) and high land (6.46-3.39 t/ha) for all AEZs. Among the four AEZs, the highest SOC stock was found in AEZ 1 irrespective of land types. DOI: http://dx.doi.org/10.3329/bjar.v38i4.18947 Bangladesh J. Agril. Res. 38(4): 625-635, December 2013

scholarly journals Influence of ryegrass managements on the physical properties of a Haplohumox

2018 ◽  
Vol 53 (8) ◽  
pp. 952-960 ◽  
Author(s):  
Bruno Vizioli ◽  
Karina Maria Vieira Cavalieri-Polizeli ◽  
Gabriel Barth
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Total Organic Carbon ◽  
Bulk Density ◽  
Block Design ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Root Penetration ◽  
Organic Carbon Content ◽  
No Tillage

Abstract: The objective of this work was to evaluate the influence of ryegrass (Lolium multiflorum) managements on the physical properties of a Haplohumox, and on the yields of corn and of ryegrass cultivated in succession to corn. The experiment was carried out in a randomized complete block design, with three treatments and three replicates, in which treatments were the different managements of ryegrass under no-tillage for silage, soil cover, and grazing. After nine years of management, samples were collected at 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30-m soil depths, to determine the following soil properties: texture, total organic carbon, soil bulk density, macroporosity, microporosity, total porosity, and resistance to root penetration. The index of structural stability was estimated from texture and total organic carbon data. Maximum soil bulk density and permanent wilting point were also estimated from pedotransfer functions. Corn and ryegrass dry matter yields were determined from plants harvested inside the plot area. Total organic carbon content increased as depth increased. The ryegrass managements in no-tillage system, in succession to corn, does not influence the soil physical properties of a Haplohumox, and maintains high corn and ryegrass yields.

Sign in / Sign up

Export Citation Format

Share Document