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Anand Agricultural University, Anand (1992)

FERTILISER MANAGEMENT OF MARGINAL SALT AFFECTED SOIL AT DEVATAJ. GUJARAT

Patel, Motibhai S.

Titre : FERTILISER MANAGEMENT OF MARGINAL SALT AFFECTED SOIL AT DEVATAJ. GUJARAT

Auteur : Patel, Motibhai S.

Université de soutenance : Anand Agricultural University, Anand

Grade : Ph.D (Agricultural Chemistry and Soil Science) 1992

Résumé partiel
In order to study the physico-chemical properties of soil as well as accumulation of salts at various depths, ten villages of Kheda districts were selected. A soil profile from each of these villages was studied. The soil was found to be marginally saline-alkali, still fit for cultivation further deterioration could be stopped by proper management and reclamation strategy on this soil. A series of field experiments were conducted at the agricultural university during Kharif and Rabi seasons of 1987-88 and 1988-89 using paddy and wheat as indicator crops in rotation. The fields were first treated with gypsum or FYM or gypsum + FYM and super imposed with.four levels of fertilizers N and three levels of phosphours (1) The overall results showed that application of gypsum or FYM have significantly reduced the pH over control during all the crops and both the depths of the soil. (2) The effectiveness in lowering the soil pH and EC was gypsum + FYM > Gypsum > FYM. (3) Fertilizer-N and P2O5 did not change the soil pH or EC significantly. (4) Water soluble Ca2+ generally remained unaffected except when FYM was applied, where also the water soluble Ca2+ was marginal. (5) Water soluble Mg was significantly increased with gypsum or FYM application. (6) Water soluble Na+ was significantly decreased with gypsum, FYM or both applied together during all the four cropping seasons. (7) Water soluble CO3— and HCO3- remained more or less unchanged. (8) As the soil is marginally saline-alkali, the mobile Cl- and SO4 2- ions had possibly leached down with irrigation water. (9) The exchangeable sodium and sodium percentage were reduced and exchangeable calcium was increased by gypsum application after both the crop

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