Long term effect of liming and P fertilizer application on yield and P uptake of spring wheat determined in 2015

"In a long term field experiment, started in 1978 and located in the Bavarian tertiary hill land near Freising, three levels of liming and three levels of P fertilizer applications had been established.
Liming treatments are: (1) no liming corresponding to a soil pH (CaCl2) of about 5 (2) liming to a target pH of 6.0-6.4 (3) liming to a target pH of 6.5-6.8.
P application levels are: (1) no P application (2) 22 kg P ha-1 year-1 (3) 44 kg P ha-1 year-1.
In 2015, when spring wheat was grown, soil pH ranged from 5.1 to 6.6 and calcium lactate/calciumacetate soluble soil P ranged from 1.8 to 4.2 mg P 100g soil-1. Grain yield of spring wheat was increased by liming but statistically significant differences were only observed between pH 5.1-5.6 and lime level treatment 2 with pH 5.9-6.1. P fertilizer application had no effect on the grain yield, ranging from 3.6-4.8 t DM ha-1 on single plot level, but significantly increased grain P uptake from 13 to 26 kg P ha-1."