No abstract

The relation of soil class, minimum-temperature differences and topography to the growing of apricot, cherry, peach, apple and pear was studied in an area 7 miles by 4 miles, varying in elevation from 1122 to 1800 feet above m.s.l. The use of an automobile-mounted thermistor thermometer was found useful in establishing minimum-temperature differences. Temperature differences bore a relationship to topography and kinds of fruit being grown satisfactorily. Soil class, except in extreme cases where land was non-arable, bore no relation to the kinds of fruit being grown satisfactorily.

No abstract

42.9 per cent Fe,OB, and the content of the whole soil from 6.5 to 9.8 per cenr SO, and 5.9 to 9.3 per

The relationship of organic phosphorus content to a number of chemical Properties was stud^ied in ii're surlace-horizons of 38 soils of six different soil orders in British Columbia.The concentration of orsanic P ransed from 1.8 to77.7"/. of the total P with amounts varying from 21 io SOZ p.p.m. The forested soils of the Podzolic and Brunisolic Ordels contained the -leist organic P. Howevet, the rvide range in orEanic P content within some soil orderi indicated that its distribution was not eniirely characteristic of the soil order.Simple correlation studies between organic P and nitrogen, carbon, pH, per cent base saturation, total P, and free ir5n in all soils bef6re assigning them to groups indicated that only nitrogen and carbon were significantly related to 6rg"ni. P. Significant relationshfrs between the other vaiiables and organic P w&e restricted'to soeciEc soil orders. The oreanic P content has been found to be primarily dependent on nitrogen and pH,"since the inclusion of the other independent variables in the multipie regression did not significantly change the coefficicnt of derermination.The range of C/organic P and N/organic P ratios for the 38 samples.was between 46 and 6+g and 5.5 to 57.6 respeCtively. Soil pH was the only variable studied which could account for the wide variation of these ratios.