@article{PAR00007499,
  title = {{S}ome observations with respect to sodicity hazard of irrigation waters ? : {R}eply to {J}.{W}. {V}an {H}oorn},
  author = {{B}arbi{\'e}ro, {L}aurent and {V}all{\`e}s, {V}. and {C}heverry, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the comments "{S}ome observations with respect to sodicity hazard of irrigation waters", {D}r. {V}an {H}oorn opened a constructive discussion about the assessment of sodicity hazard of soils subjected to irrigation in arid or semi arid areas. {T}he following are three concepts usually used for the afore mentioned assessment, which are reminded in his comment on our article: · {T}he {S}odium {A}dsorption {R}atio, {SAR} = {N}a/(({C}a+{M}g)/2)1/2 in eq.{L}-1, ({R}ichards, 1954). · {T}he adjusted {SAR}, {SAR}adj = {SAR} (1 + (8.4 ? p{H}c)), ({S}uarez, 1981; {A}yers and {W}estcot, 1985) · {T}he {R}esidual {S}odium {C}arbonate, {RSC} = {A}lk. ? {C}a ? {M}g in eq.{L}-1 ({E}aton, 1950; {R}ichards, 1954) {W}e identified two major points in {D}r's {V}an {H}oorn comments. {T}he first one deals with the assessment of the chemical quality of the water used in {N}iger with respect to soil sodization hazard ({B}arbi{\'e}ro et al., 2001). {I}ndeed, the sodicity hazard is low, low-moderate, or very high according to the {SAR}, the {SAR}adj, or the {RSC} respectively. {T}herefore, the donors face with a difficult choice in developing new irrigation schemes in {N}iger valley. {D}r. {V}an {H}oorn concludes that the {RSC} is the most suitable indicator for the assessment of sodicity hazard of {N}iger irrigation water. {W}ith the second point {D}r. {V}an {H}oorn is considering if the process of magnesium precipitation should be taken into account for the assessment of sodicity hazard. {B}oth questions will be answered successively.},
  keywords = {sodicity ; alkalinity ; irrigation water ; degradation hazard},
  booktitle = {},
  journal = {{A}gricultural {W}ater {M}anagement},
  volume = {68},
  numero = {},
  pages = {177--184},
  year = {2004},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007499},
}