Deficiency symptoms and chemical composition of lespedeza as related to fertilization
1942
Blaser, R.E. | Volk, G.M. | Stokes, W.E.
A lespedeza test was established on a Leon fine sand, a soil typical of a large portion of the flat pine lands of peninsular Florida. The effect of certain combinations of fertilizer nutrients on mineral-deficiency symptoms, composition, and growth are given. The calcium, phosphorus, potassium, and nitrogen content of annual lespedeza, sampled during the early bloom stage, was significantly increased by fertilization. Fertilization also increased the plant size. Phosphorus-deficiency symptoms of lespedeza are described and illustrated. The deficiency symptoms vary depending on the presence of other nutrients. Plant analyses substantiate foliar symptoms of phosphorus deficiency. Potassium-deficiency symptoms, as found when a fertilizer mixture of lime and superphosphate was used, are described and illustrated. The visible symptoms are corroborated by the chemical composition of the plants. Phosphorus fertilizer increased the phosphorus content of lespedeza. The increases of phosphorus in lespedeza were accompanied by highly significant increases in nitrogen content. Soil analysis showed that the virgin Leon soil was low in readily soluble phosphorus, calcium, and potassium. The elements calcium, phosphorus, and potassium must be added to virgin soils of the Leon series to produce a satisfactory growth of lespedeza.
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