Assessment of the phosphorus status of oilseed rape by plant analysis
1989
Pinkerton, A. | Spencer, K. | Govaars, A.G. (Commonwealth Scientific and Industrial Research Organization, Canberra (Australia). Div. of Plant Industry)
In field tests, the lowest P concentration in young shoots associated with a P supply that was adequate for plant growth was approximately 0.31 percent. The youngest fully-expanded leaf was a reliable plant part to sample, its P concentration being about 0.05 percent lower than the concentration of the whole shoot. Critical P concentrations in young plants for sustaining 90 percent of maximum seed and oil yields were higher, namely 0.33 and 0.28 percent for whole shoots and youngest fully-expanded leaves respectively. The critical P concentration in seeds was about 0.35 percent.
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