The Green Revolution (GR) made a major contribution to increasing the rice yield in the Philippines from 1.3 t ha −1 in 1966 to 4.0 t ha −1 in 2018, but the changes in paddy soil f
Characteristics of soil samples in monocropping and intercropping systems with different fertilization treatments. CK, plots without fertilizer added; CF_I, plots with 60 kg N ha-1 of urea; CF_II, plo
The availability of soil phosphorus (P) norms for various plant available P tests is limited due to the cost of establishing these norms. Consequently a need exists for a means of converting between t
