The Effect of Irrigation on Soil Salts at the Gezira Research Farm, Wad Medani, Sudan

Greene, H.; Peto, R. H. K.

doi:10.1017/s0021859600012430

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…With change in climate the salt distribution pattern reaches steady state conditions with mean effective rainfall rather rapidly, even though other soil profile properties may still show signs of previous climatic regimes [Yaalon, 1965]. Greene [1934] inverted a normal soil profile, replacing low-salt strata near the surface with high-salt soil from below, and 3 years and 30 wettings later the profile had reverted to the original pattern.…”

Section: Sionsmentioning

confidence: 99%

Assessment of available water storage capacity of soils with restricted subsoil permeability

McCown¹,

Murtha²,

Smith³

1976

Water Resources Research

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The pasture production of most of the tropics is largely a function of the water regime. One of the few options for control of the water regime in these environments is choice of site. A site parameter of great importance is the available water storage capacity (AWSC) in the root zone. Although estimation of the AWSC is straightforward on freely drained soils, it is complicated on poorly drained soils by the inapplicability of the concept of field capacity. The latter soils, however, commonly have a buildup of salts at depth in the profile, presumably due to prevailing leaching conditions. The study reported herein was conducted to test the hypothesis that this salt profile can be used to indicate the depth of wetting under conditions similar to those producing maximum subsoil water recharge in this climate. Twenty sites on mainly texture contrast soils, most with poorly drained subsoils, were examined in detail. A close relationship between the observed depth of wetting and the depth to the salt bulge was found. This relationship, together with the total porosity of the top (wettest) stratum of the B horizon, provides a means of estimating the AWSC of the subsoil.

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Section: Sionsmentioning

confidence: 99%

Assessment of available water storage capacity of soils with restricted subsoil permeability

McCown¹,

Murtha²,

Smith³

1976

Water Resources Research

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“…The subject of this paper was investigated by Greene & Peto (1934), using conductimetric methods of salt determination. They showed that during a normal irrigation cycle there was substantially no change in salt distribution in the upper 6 ft. of soil, and that certain small apparent changes were largely due to swelling and shrinkage of the soil surface caused by changes in soil moisture content and by cultivation.…”

mentioning

confidence: 99%

Changes in Sudan Gezira soil under irrigation

Jewitt¹,

Middleton²

1955

J. Agric. Sci.

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Work on improvement of saline-alkali land on the University Farm, Khartoum, 1956–59

Worrall

1961

J. Agric. Sci.

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Over the 3 years of the experiment the salt in the top 2 ft. of the soil was reduced by almost a half of the original amount, and nearly all this was removed in the first season. The movement was downwards, and there was little evidence of any upward movement; flushing was not very effective in removing salt from the soil. The type of cultivation affected the amount of salt removed, deep subsoiling being most successful with over 50% removal, but irrigation without any cultivation removed 29%. The penetration of irrigation water was very restricted in the first waterings, but became increasingly deeper as the experiment continued.Crop yields showed a steady improvement from season to season, the final average of about 1500 lb. per feddan being above the average for the district. The various treatments did not appear to have much effect on the yields, and the general improvement in yields is attributed to the reduction of salt content and to the deeper water penetration, chiefly the latter. The detrimental effect of the dry north winds was more apparent than the effects of the different treatments.

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The Effect of Irrigation on Soil Salts at the Gezira Research Farm, Wad Medani, Sudan

Cited by 4 publications

References 5 publications

Assessment of available water storage capacity of soils with restricted subsoil permeability

Assessment of available water storage capacity of soils with restricted subsoil permeability

Changes in Sudan Gezira soil under irrigation

Work on improvement of saline-alkali land on the University Farm, Khartoum, 1956–59

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