Effect of phosphorus on the yield, quality and petiolar phosphorus concentrations of potatoes (cvv. Russet Burbank and Kennebec) grown in the krasnozem and duplex soils of Victoria

摘要

Summary. The response of cvv. Russet Burbank and Kennebec potatoes to different levels of residual and applied phosphorus (P) was compared on krasnozem and duplex soils in the Central Highlands of Victoria. Field experiments were conducted at 12 sites over 3 years to examine the effects of applied P (banded at planting) at rates up to 475 kg/ha on yield, petiolar P concentrations, tuber size, number of tubers/plant and specific gravity. The relationships between yield response and fertiliser P required to optimise yields with Olsen P and P adsorption isotherms were also determined.