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Performance of 5 perennial forage grasses as influenced by gypsum levels in a highly sodic soil



Performance of 5 perennial forage grasses as influenced by gypsum levels in a highly sodic soil



Indian Journal of Agricultural Sciences 49(6): 473-477



A field experiment conducted during 1973 and 1974 in a highly sodic soil indicated that an increase in the level of gypsum increased the yield of green forage of 5 spp. of perennial grasses. Application of gypsum decreased the soil pH and exchangeable Na percentage (ESP) and increased the infiltration rate. In 1973, when only 1 cut was taken from all the grasses, para-grass [Brachiaria mutica (Forsk.) Stapf] outyielded all other grasses, but in 1974 it yielded less than Bermuda grass [Cynodon dactylon (Linn.) Pers.] with a gypsum level of up to 6.25 tonnes/ha but more with higher gypsum levels. There was no reduction in yield up to an ESP of 53 in Bermuda grass and only 30% reduction at ESP 50 in para-grass, which were rated as tolerant to sodicity. Setaria grass [Setaria sphacelata (Schum.) Stapf and Hubb.] and #B 21' hybrid Napier [Pennisetum purpureum Schum. .times. P. typhoides (Burm. f.) Stapf and C. E. Hubb.] were medium-tolerant as their yields reduced by more than 60% even at ESP 40, at which the sensitive guinea-grass [Panicum maximum] showed nearly 90% yield reduction.

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Accession: 006082848

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