Observations of Cracking in Somali Vertisols

Virgo, K.J.

doi:10.1097/00010694-198101000-00011

Cited by 9 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vertosols are well known for their shrink-swell behaviour and to some extent have the ability to repair themselves over time as the soil undergoes a series of wetting and drying cycles (Yule and Ritchie, 1980a-b;Chinn and Pillai, 2008;Dinka et al, 2013). Crop growth facilitates this process via 'biological tillage' as the extraction o f water by the crop accelerates soil shrinkage, cracking and opening-up o f previously compacted soil (Virgo, 1981;Pillai and McGarry, 1999). Shrinkage is not necessarily affected by severe compaction; however, formation o f cracks occurs at increasingly lower rate with increasing soil compaction, which is due to reduced root growth and function under such condition (Batey and McKenzie, 2006;Andersen et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

The Effects of Coal Seam Gas Infrastructure Development on Arable Land in Southern Queensland, Australia: Field Investigations and Modeling

2016

Trans. ASABE

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

The Effects of Coal Seam Gas Infrastructure Development on Arable Land in Southern Queensland, Australia: Field Investigations and Modeling

2016

Trans. ASABE

View full text Add to dashboard Cite

show abstract

“…Leaching from Vertisols may, however, be confined to the onset of the rainy season when the soils percolate readily (KRANTZ andKAMPEN 1978, KRANTZ et al 1978). Once saturated, they are virtually impermeable to water (VIRGO 1981).…”

Section: Introductionmentioning

confidence: 99%

Losses and Utilization of Nitrogen by Sorghum as Affected by the Depth of a Swelling Clay Soil

Hong

Katyal

Vlek

1992

J Agronomy Crop Science

View full text Add to dashboard Cite

Chromusterts and Pellusterts located in India represent 20 % of the 257 million ha of Vertisols found worldwide. These soils are commonly associated with soils that exhibit vertic characteristics, such as Ustochrepts and Ustropepts, but that are too shallow (< 50 cm) to be classified as Vertisols; India has 20 million ha of such soils. Nitrogen is generally deficient in these soils, irrespective of their depth. N response of sorghum on the Vertisols is good even under rainfed conditions. Over a period of 5 years (1982, 83, 84, 85, and S7) the responses of sorghum to applied N on a deep Pellustert and a shallow vertic Ustochrept were compared and, with the use of labelled fertilizer, the fate of N was traced through the soil-plant system. It is clear from the results that, when weather conditions were favorable, response to applied N was excellent and losses were low, irrespective of soil depth. However, when periods of excessive rainfall occurred, the loss of native and applied N apparently increased rapidly, particularly in the shallow Ustochrept where rooting is largely limited to the top 50 cm. Losses of N from applied urea were up to threefold higher in the shallow Ustochrept than in the deep Pellustert; these losses, together with the rapid loss of applied NO3, suggest that leaching is the predominant cause of N loss. Nitrogen application rates should be adjusted on the basis of rainfall during the early part of the growing season. Due to the unpredictabiUty of the rainfall pattern following fertilizer application, NO3 sources should be avoided and nitrogen split as frequently as possible on the shallow vertic Ustochrepts of the Indian semi-arid tropics.

show abstract

Finite Element Analysis of Soil Moisture Flow and Moisture Stress in a Dessicating Soil

Nieber

1982

Finite Elements in Water Resources

View full text Add to dashboard Cite

Observations of Cracking in Somali Vertisols

Cited by 9 publications

References 0 publications

The Effects of Coal Seam Gas Infrastructure Development on Arable Land in Southern Queensland, Australia: Field Investigations and Modeling

The Effects of Coal Seam Gas Infrastructure Development on Arable Land in Southern Queensland, Australia: Field Investigations and Modeling

Losses and Utilization of Nitrogen by Sorghum as Affected by the Depth of a Swelling Clay Soil

Finite Element Analysis of Soil Moisture Flow and Moisture Stress in a Dessicating Soil

Contact Info

Product

Resources

About