Abstract
The effect of high rates of lime and P on the field production of rice (oryza sativa L.) and clover-grass forage (Trifolium repens L.- native grass) grown in rotation and on rice grown in a rice-fallow rotation was measured on Crowley silt loam. Chemical analyses of the plant tissues were made and soil test values were determined. Lime reduced the rough rice yield while the production of clover-grass forage grown in rotation was increased with applications of up to 2 tons of lime per acre. Extractable soil Ca and soil pH increased with each increment of lime applied. Increasing rates of lime decreased the concentration of Zn and Mn in both clover and grass forage. The Ca concentration was much greater in clover than in grass at all rates of lime. Bronze-colored rice leaves, believed to be a symptom of Zn deficiency, were observed in the 3 tons per acre and 4 tons per acre lime treatments. This observation led to the initiation of other experiments which provided information to support the idea that the reduction in rough rice yield with applications of lime was associated with a lime-induced Zn deficiency. Two additional experiments were reported in which rice responded favorably to application of Zn. Crowley silt loam, sampled while flooded and while rice was growing and analyzed in a saturated condition, had a higher pH and less extractable Ca than a soil sample collected from the same site but at field capacity. High rates of P applied to Crowley silt loam increased rough rice yield and clover-glass forage yield when these two crops were grown in rotation. The application of P to each rice crop increased the yield of rough rice at each level of soil P. Clover-grass forage yield was increased at the lower levels of soil P by the residual P from the previous year when P was applied to the rice crop..
Peterson, Freddie J. (1971). Response of rice (oryza sativa L.) and clover (Trifolium repens L.) to large applications of lime and phosphorus. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -179334.