Effect of ethephon and phosphorus levels on plant growth parameters,total phenolic content and plant dry matter of sweet corn (Zea mays l. saccharata) grown on Rasau soil series

absorbance application rates bulk density (soil) chemical composition chlorophylls dry matter content ethephon experiments growth rate height leaves nitrogen content phenolic compounds phosphorus phosphorus fertilizers plant porosity roots seedlings soil organic matter soil physical properties soil water content sweet corn transplanting zea mays