soil available phosphorus
adsorption of rapidly available phosphorus
available phosphorus AP
available phosphorus degradation
available phosphorus distribution
Available Phosphorus of Soil
available soil moisture
available soil nutrients
available soil potassium
available soil water at planting
Biological available phosphorus
Change in available phosphorus
Critical level of soil available K
fertilizing critical values of soil available K
low available phosphorus
microbial available phosphorus MAP