significant trends associated with experimental treatments (Table 5-12).

The gravel content showed differences between depths, but not between

fertilizer schedules (Table 5-13 and 5-14).

 The split fertilizer applications were for the most part

applications of N and K, because most of the P and Ca applied were in

the triple superphosphate which had been applied preplant in all

application schedules (Table 5-15). Analysis of variance for the

effects of the experimental factors on Mehlich I-extractable P, K, and

Ca indicated that planting date and fertilizer schedule had an

insignificant effect on overall nutrient concentrations averaged over

all depths (Table 5-16). The effects of sampling depth on nutrient

concentrations were significant. Since depth was nested within

fertilizer treatment and our experimental interest was in the location

of nutrients as affected by fertilizer schedule, mean separations were

made to distinguish differences among fertilizer-application schedules

within each depth, instead of differences between depths among

fertilizer schedules. Clear patterns are difficult to discern. The

concentration of K from 5 to 25 cm in all of the fertilized plots was

less than for the unfertilized control (Table 5-17). This would suggest

that fertilizer application enhanced K uptake to an even greater extent

than the amount applied. Limiting of this effect to the top 25 cm is

most likely related to the large increase in gravel concentration at the

top of the Btc horizon at about 22 cm, and to the subsequent effect of

the gravel on root growth (Table 5-18).

 The concentrations of Ca at the various depths showed no

 discernable pattern for the fertilized treatments or the control (Table