Assessing the impact of irrigating with saline water on physical properties of a sandy loam soil.

2021 ◽  
Author(s):  
Tinashe Mawodza ◽  
Manoj Menon ◽  
Masoud Babaei ◽  
Genoveva Burca ◽  
Oxana V. Magdysyuk
Keyword(s):  
Physical Properties ◽  
Sandy Loam ◽  
Saline Water ◽  
Aggregate Stability ◽  
Ct Scanning ◽  
Sandy Loam Soil ◽  
Irrigation Period ◽  
The World ◽  
Loam Soil ◽  
The Impact

<p>Soil salinisation is one of the most potent forms of land degradation that affects soils of arid and semi-arid regions of the world. Management of soils with potential for salinisation is key to ensuring the sustainability of marginal soils in predominantly dry regions of the world. In this research, to assess the potential impact of irrigation with saline water on the physical properties of a marginal soil. We subjected a sandy loam soil to flood irrigation with water of variable salinity levels (namely 0, 2,  5 and 10 g/L NaCl) for up to 40 days. After every irrigation cycle, each of the soil samples was subjected hydraulic conductivity measurements for the duration of the experiment. At the end of the 40 day experimental irrigation period, soil cores were non-invasively scanned using X-Ray CT scanning to assess for changes in pore distribution as a result of the different irrigation quality water. Furthermore, measurement of other physio-chemical soil properties such as aggregate stability, EC and pH of each soil were also done to get a more complete idea of the changes that occurred during the experiment. </p>

Surface physical properties of a sandy loam soil under different tillage practices

Soil Research ◽  
1988 ◽  
Vol 26 (3) ◽  
pp. 549 ◽  
Author(s):  
KY Chan ◽  
JA Mead
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Organic Carbon Content ◽  
Moisture Profile ◽  
Tillage Practices ◽  
Pasture Soil ◽  
Cultivated Soil ◽  
Loam Soil

The infiltration behaviour and physical properties of a hardsetting sandy loam soil at Cowra, N.S.W., following 2 years of different tillage treatments are reported. Soil that had not been cultivated for 25 years was also investigated at an adjacent pasture site. Infiltration of simulated rainfall at the end of the wheat-growing season gave moisture profiles that were quite different for cultivated, direct drilled and pasture soils. The moisture profile for the cultivated soil suggested the presence of an impeded layer which retarded the movement of infiltrated rain to the subsoil. Porosity measurements confirmed the presence of a layer with significantly fewer macropores (> 300 �m diameter) at the 50-100 mm depth in the cultivated soil, when compared with the direct drilled soil. The old pasture soil had significantly higher porosity (> 300 �m diameter) in the top 100 mm. Aggregate stabilities and organic carbon contents were measured in narrow increments to 150 mm depth for the three different soils, and revealed that a surface 25 mm layer of high organic carbon and highly stable macro-aggregates was present in the pasture and direct drilled soils but absent in the cultivated soil. The unstable surface layer in the conventionally cultivated soil was a consequence of the mixing and inverting action of cultivation and was not due to a net loss of organic carbon from the profile. The organic carbon content of the pasture soil was not significantly different from the direct drilled soil below 50 mm; however, it was significantly lower than the conventionally cultivated soil between 50 and 150 mm depth. These results indicate a need to adopt tillage practices that can preserve the top 25 mm layer of such fragile soils.

Improving aggregate stability and hydraulic properties of Sandy loam soil by applying polyacrylamide polymer

2021 ◽  
Vol 206 ◽  
pp. 104821
Author(s):  
Ammar A. Albalasmeh ◽  
Enas H. Hamdan ◽  
Mamoun A. Gharaibeh ◽  
Ali El Hanandeh
Keyword(s):  
Hydraulic Properties ◽  
Sandy Loam ◽  
Aggregate Stability ◽  
Sandy Loam Soil ◽  
Loam Soil

Soil water drying and recharge rates as affected by tillage under continuous barley and barley-canola cropping systems in northwestern Canada

2001 ◽  
Vol 81 (1) ◽  
pp. 45-52 ◽  
Author(s):  
R H Azooz ◽  
M A Arshad
Keyword(s):  
Soil Moisture ◽  
Soil Water ◽  
Sandy Loam ◽  
Time Domain Reflectometry ◽  
Sandy Loam Soil ◽  
Soil Conditions ◽  
Silt Loam ◽  
Silt Loam Soil ◽  
Loam Soil ◽  
The Impact

In areas of the northwestern Canadian Prairies, barley and canola are grown in a short growing season with high rainfall variability. Excessively dry soil in conventional tillage (CT) in dry periods and excessively wet soil in no-tillage (NT) in wet periods could cause a significant decrease in crop production by influencing the availability of soil water. The effects of CT, NT and NT with a 7.5-cm residue-free strip on the planting rows (NTR) on soil water drying (–dW/dt) and recharge (dW/dt) rates were studied in 1992 and 1993 during wet and dry periods to evaluate the impact of NTR, NT and CT systems on soil moisture condition. The soils, Donnelly silt loam and Donnelly sandy loam (both Gray Luvisol) were selected and soil water content by depth was measured by time domain reflectometry. Water retained at 6 matric potentials from –5 to –160 kPa were observed. In the field study, –dW/dt was significantly greater in CT than in NT in the silt loam for the 0- to 30-cm layer during the first 34 d after planting in 1992. The 0- to 30-cm soil layer in CT and NTR dried faster than in NT during a period immediately following heavy rainfall in the silt loam in 1993. The drying coefficient (–Kd ) was significantly greater in CT and NTR than in NT in the silt loam soil in 1993 and in the sandy loam soil in 1992 in the top 30-cm depth. The recharge coefficient (Kr) was significantly greater in NT and NTR than in CT for the silt loam soil. The NTR system increased the –dW/dt by 1.2 × 10-2 to 12.1 × 10-2 cm d-1 in 1992 and 1993 in the silt loam soil and by 10.2 × 10-2 cm d-1 in 1993 in the sandy loam soil as compared with NT. The dW/dt was 8.1 × 10-2 cm d-1 greater in NTR in 1992 and 1993 in the silt loam soil and was 1.9 × 10-2 greater in NTR in 1992 than in CT in the sandy loam soil. The laboratory study indicated that NT soils retained more water than the CT soils. The NTR practice maintained better soil moisture conditions for crop growth than CT in dry periods than NT in wet periods. Compared with NT, the NTR avoided prolonged near-saturated soil conditions with increased soil drying rate under extremely wet soil. Key words: Water drying, water recharge, water depletion, wet and drying periods, hydraulic properties, soil capacity to retain water

Effect of tillage and fertilization on inorganic and organic soil phosphorus

1993 ◽  
Vol 73 (3) ◽  
pp. 359-369 ◽  
Author(s):  
I. P. O'Halloran
Keyword(s):  
Surface Layer ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Fertilizer Treatment ◽  
Soil Organic C ◽  
P Fractionation ◽  
Organic C ◽  
No Till ◽  
Loam Soil ◽  
The Impact

This study was conducted to evaluate the impact of tillage and fertilization practices on soil organic carbon (organic-C) and the distribution of phosphorus between inorganic (Pi) and organic (Po) pools in a clay and sandy loam soil under a continuous corn (Zea mays L.) production system. Tillage treatments were established in the fall of 1981. The soils for this study were sampled (0- to 10-cm and 10- to 20-cm) in June 1988. Treatments consisted of three types of tillage: (i) conventional (CT): fall moldboard ploughing with two spring diskings; (ii) reduced (RT): with either fall chisel ploughing (1981–1986) or no fall tillage (1987) followed by one spring disking, and (iii) no-till (NT); and two types of fertilization (i) inorganic (I): 170 kg N ha−1. 80 kg P2O5, ha−1, 75 kg K2O ha−1, and (ii) organic fertilizer (O): dairy manure applied to give 170 kg N ha−1 plus 80 kg P2O5, ha−1 from inorganic P fertilizer. Even though a lime application was made in the fall of 1985, soil pH was significantly lower in the I fertilizer treatments. Reduction of tillage intensity resulted in a lower pH in the surface layer of the sandy loam soil. Tillage did not affect soil organic-C, or total soil Po (soil-Po) in either soil. Compared with the I fertilizer treatment, the O fertilizer treatment resulted in increased levels of soil organic-C and soil-Po only in the sandy loam soil. Labile levels of Po in the soil were not affected by treatments. Increased soil-Po levels possibly resulted from an increase in stable Po complexes. Moderately labile Po levels were not affected by treatments in the clay soil. In the sandy loam soil, O fertilization decreased moderately labile Po levels in the surface layer of the NT treatment, and increased this P fraction in the 10- to 20-cm soil layer of the RT and CT treatments. In the surface layer of both soils, labile levels of Pi were greater for the O fertilization treatment (approximately 40 and 47% higher for the clay and sandy loam, respectively), and were lower under CT. Increased labile Pi levels were associated with the O fertilizer treatment in the 10- to 20-cm depth increment in the sandy loam soil only, suggesting a greater downward movement of P with manure applications. Key words: Conventional tillage, zero-tilled, no-till, reduced tillage, manure, P fractionation

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