Effect of Sodium Bicarbonate on the Solubility of Phosphorus in Calcareous Soils

The influence of halophytic compost, farmyard manure and phosphobacteria on soil microflora and enzyme activities

“…By the end of the third month, the compost was ready for use. The soil-available nutrients such as nitrogen (Subbaiah and Asija 1959), phosphorus (Olsen et al 1954) and potassium (Jackson 1973) were analysed before the beginning of the experiment. The physical-chemical characteristics of the experimental soil presented in Tables 1 and 2 show the nutrient contents of the selected halophytic compost.…”

Tef Yield Response to NPS Fertilizer and Methods of Sowing in East Shewa, Ethiopia

“…According to Hazelton and Murphy (2007) CEC rating, 25-40 is high. According to Olsen et al, (1954) P rating (mgkg -1 ), P content of < 3 is very low, 4 to 7 is low, 8 to 11 is medium, and > 11 is high. Thus the experimental site of available P content is low.…”

The Effect of Bicarbonate on the Uptake of Iron in Four Related Grasses

“…Against this, however, it has been argued that the effect of bicarbonate upon chlorosis is indirect (Brown,i960); Brown has provided evidence that iron inactivation is due to the presence of high phosphate concentrations in the tissues brought about by the action of bicarbonate in increasing both the solubility of phosphate in calcareous soils (Olsen,Watanabe and Cole,i960) and the uptake of phosphate into the plant (Brown,i960;Goss,i960). The development of chlorosis curable by the application of iron sprays, in the presence of high concentrations of phosphorus is a well-known phenomenon (Olsen, 1935;Bell, Bogorad and Mcllwrath, 1959). The experiment reported here extends the comparative study of the four related grasses to the influence of bicarbonate on the uptake of iron, the effect of phosphate uptake will be the subject of a subsequent paper.…”