Experimental dissolution of biopolymer-coated phosphorus fertilizers applied to a soil surface: Impact on soil pH and P dynamics

Phosphorus Availability to Barley from Manures and Fertilizers on a Calcareous Soil

High concentrations of animal production in the United States have increased the concern about the environmental fate of phosphorus (P) in manures. We conducted a growth chamber study to develop phosphorus source coefficients (PSCs) for manures and fertilizers typically land applied and incorporated into calcareous soils of the western United States as well as to determine the potential plant P...

Central Composite experimental design applied to removal of phenanthrene and acenaphthene from soil samples

Abstract In this work, removal of phenanthrene and acenaphthene, as a representative of polycyclic aromatic hydrocarbons, was investigated from soil samples by the soil washing remediation method combined with Central Composite Design. Response surface methodology was utilized to investigate the individual and interactive effects of three variables of removal process including surfactant solut...

Soil pH Effects on Nitrification of Fall-Applied Anhydrous Ammonia

November or before April because soils either are frozen or too wet. Soil temperature at the time of application has been the primary It has been recommended that fall applications of N factor used to predict rates of nitrification and assess the risks associbe delayed until soil temperature has decreased to 10 C ated with losses of N applied in the fall as anhydrous ammonia in the at a depth o...

Managing Fertilizers to Enhance Soil Health

Effects of Sulfur Application on Soil pH and Uptake of Phosphorus, Iron and Zinc in Apple Trees

The main reasons for the fixation of some elements and consequently nutrient deficiencies, especially phosphorus, iron and zinc, are high levels of calcium (calcareous soils) and soil pH. Two sulfur fertilizers (sulfur alone and sulfur + organic material + Thiobacillus spp.) with two rates (2 and 4 kg sulfur/tree) were used to decrease soil pH and availability of P, Fe and Zn in apple trees dur...