The rainfall carries lime and other bases downwards beyond the reach of plant roots. ... Saline and alkali soils are generally noticed in arid and semi arid regions where there is low rainfall and high temperature causing intense evaporation. ... Gypsum is applied on the soil surface and mixed by harrowing tow to four weeks before sowing @ 2.5 ...
Methods: Seven transects and 136 quadrats were established in a semi-arid gypsum system. Seed bank samples were collected in each quadrat in September. The community was sampled the following April. For each quadrat we measured slope, microslope, landform, elevation, perennial cover and crust cover. Seed bank was estimated using the direct ...
This paper determines the influence of lime and gypsum on the rehabilitation of a degraded sodic soil in a semi-arid environment 12 years after application. The aim was to assess rehabilitation strategies for sodic soils as alternatives to the application of gypsum alone.
Spatial coherence between seasonal seed banks in a semi-arid gypsum community: density changes but structure does not I. Caballero1, J.M. Olano2*, A.L. Luzuriaga3 and A. Escudero3 1Laboratorio de Bota ´nica, Departamento de Biologı´a Vegetal y Ecologıa, Facultad de Ciencias, Universidad del Paı´s Vasco, Apdo. 644, Bilbao E-48080, Spain; 2A´rea de Biologı´a Vegetal, Departamento de ...
These findings provide information for evaluating land use practices for increased soil carbon sequestration under semi-arid region biofuel crop production. This study investigated a new strategy for increasing carbon retention in slightly alkaline soils through addition of fuel gas desulfurization gypsum (FGDG, CaSO4∙2H2O).
environmental climates, especially in arid and semi-arid environments. Jafari et al. (2004) suggested that the distribution pattern of vegetation in the Poshtkouh rangelands of Yazd was mainly related to soil characteristics such as salinity, texture, and soluble potassium, gypsum, and lime contents. Zhang et …
This paper determines the influence of lime and gypsum on the rehabilitation of a degraded sodic soil in a semi-arid environment 12 years after application.
The gypsovag shrub Cistus clusii is locally dominant in semi-arid gypsum plant communities of North-Eastern Spain. This species commonly grows in species-poor patches even though it has nurse potential, suggesting interference on neighbouring species. Other Cistus species exert a chemically mediated interference on plant communities, suggesting that it might be a common …
A particular type of semi-arid environment is found in gypsum outcrops. Gypsum environments are characterized by a hard physical crust limiting plant establishment, chemical stress, principally due to an excess of calcium, and water stress ( Escudero et al., 2015 ).
Gypsum is a relatively common mineral that is widely available in agricultural areas and has a number of specialized agronomic uses, principally as a Ca source on legumes and as a soil conditioner on sodic soils. Recent research has suggest that the utility of gypsum may extend to a greater range of soils and crops than previously acknowledged.
In arid and semi-arid areas gypsum is dissolved in the wet season and tends to be precipitated when the soil is dry. Whatever the source of calcium and sulphate ions, the precipitation of gypsum in soils is a function of the nature and the composition of the soil solution, as …
A soil which has ESP value greater than 15 is scarce even in semi-arid and arid condition while low ESP soil (ranging 1-5) is widespread in arid and semi-arid conditions and even humid regions (Shainberget al., 1989). As a result, the dispersive and unstable soils where gypsum potentially can be used are much more significant. The leaching
Because of the beneficial influence of lime on soil structure, there has been much research on the use of lime and other acid-neutralizing materials for improving degraded soils, especially in arid and semi-arid countries, for example Kirkham et al. . Bennett et al.
semi-arid moist), the majority of the black soils is grouped as Typic Haplusterts. The Gypsic and Calcic Haplusterts are confined only in the semi-arid dry system with a MAR of 800–550 mm. The Sodic Haplusterts occur in semi-arid (dry) bioclimatic system and gradually these soils dominate the entire arid …
Thus, it seems evident that both strategies, slow and fast germinators, can be found in the semi-arid gypsum environments of central Spain. Although there are no phenological data to support these differences, it is suggested that faster germinators could germinate with late spring rains (Freas & …
Five trials over the 850 m to 1300 m altitudinal range in the semi-arid zone of North ... obtain well nodulated clovers in a situation where using lime is probably impractical. 900 and 1100 m altitude in the inland South ... (0 and 56 kg/ha S as If3 gypsum,
This paper determines the influence of lime and gypsum on the rehabilitation of a degraded sodic soil in a semi-arid environment 12 years after application. The aim was to assess rehabilitation strategies for sodic soils as alternatives to the application of gypsum alone. An experimental site was used where lime and gypsum combinations (L0G0, lime 0 t ha–1 and gypsum …
The vegetation is a semi-arid gypsum steppe mainly dominated by Stipa tenacissima, a tussock-forming grass, scattered in a matrix of biological soil crust dominated by crustose lichens and a very rich annual plant community (Luzuriaga et al., Reference Luzuriaga, Sánchez, Maestre and Escudero 2012), in which the selected species are quite ...
•Occurs in arid and semi-arid climates. •Poor structure (low infiltration, water holding capacity, crusting, etc.) and chemical properties. Sodic Soil Remediation Dept. of Agriculture and Food, Government of Western Australia ... lime lime + gypsum (Adapted from Farina and Channon, 1988)
Dunes of both coarse crystalline and fine floury gypsum and lunettes of sand, silt, or clay size material are common near to the leeward margin of salt lakes. Further removed, materials, blown out from the lake areas as aggregates of clay, silt, and sand, are deposited as sheets which are medium‐textured and have a high lime content.
Semi-arid regions with a precipitation sum of 250 to 500 mm per annum and a steppe savannah/prairie/pampa vegetation. ... calcium chloride in the soil. Where lime or gypsum occur at shallow depth in the soil body, deep ploughing (mixing the carbonate or gypsum containing subsoil with the surface soil) may make expensive amendments superfluous ...
Background: Saline-sodic soils are widely distributed in arid and semi-arid regions around the world. High levels of salt and sodium inhibit the growth and development of crops. However, there has been limited reports on both osmotic potential in soil solutions (OP ss) and characteristics of Na + and K + absorption in rice in saline-sodic soils under various amendments application.
In the arid and semi-arid regions of the United States, the successful manage- ... most often used form of calcium is gypsum (calcium sulfate). According to on-site cir ... between the free lime in the soil and the added elemental sulfur or sulfuric acid which produces gypsum in the soil. The slowest
They are generally noticed in arid and semi-arid regions where there is low rainfall and high temperature causing intense evaporation. ... CaO readily dissolves in water to form slaked lime– Ca ...
The application of gypsum did not affect the tested agro-energy variables. GCV ranged around 17 MJ kg-1, confirming the suitability of the varieties for bioenergy use in semi-arid regions, but there were no significant differences between sugarcane varieties. Key words: Bioenergy, Saccharum spp, gross calorific value, oxisoils; soil amendments.
This paper determines the influence of lime and gypsum on the rehabilitation of a degraded sodic soil in a semi-arid environment 12 years after application. The aim was to assess rehabilitation strategies for sodic soils as alternatives to the application of gypsum alone. An experimental site was used where lime and gypsum combinations (L0G0, lime 0tha1 and gypsum …
Gypsum is commonly used to reclaim sodic and saline soils in arid and semi-arid regions, for example, especially where salty water is used for irrigation. Gypsum has also been shown to increase aggregation, reduce surface crusting, improve crop rooting, and boost yields in soils of the Southeast's Piedmont and Coastal Plain regions.
Because gypsum is more soluble, and leaches more easily than lime, surface applications of gypsum can be useful for improving conditions for plant growth in subsoil Channon 1988a, 1988b;McLay et ...
Salinity generally occurs in arid and semi-arid regions, where leaching of the profile is restricted (Bernstein 1975). Within Australia salinity affects 5.3% (386,300 ... through continued application of gypsum and/or lime, resulting also in increased soil salinity. The low solubility of gypsum (approximately 2.6 g/L) however, means
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