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<br />---i <br />to <br />":J'l <br />.-l <br />.::' Table 1. <br />(~~ <br /> <br />Hardiness (T50) of shoots and flower buds collected from l2-year-old Elberta <br />peach trees growing under 3 different irrigation praetices (Hatch, 1974). <br /> <br /> Irrigation Date (Month/lill) (0 F) Y <br />Tissue <br /> TreatmentZ *** / 11/11 1l/18 11/25 12/2 Mean FX <br /> 11/12/75 11 4 <br /> * <br />Bud Mid-September -8.1 -7.4 -6.9 -7.9 -8.2 -7.7 5.45 <br /> Mid-October -8.4 -7.0 -7.1 -7.8 -8.9 -7.8 <br /> Trickle -13.1 -8.4 -8.3 -9.9 -8.9 -10.4 -9.2 <br />wF block 0.23 1.43 1. 03 0.19 2.37 <br />w treatment 0.10 6.08* 2.93 3.78 0.72 <br />Cambium Mid-September -7.4 -9.0 -8.9 -9.7 -8.3 -8.7 6.28* <br /> 14id-October -6.9 -8.8 -9.2 -9.5 -9.7 -8.8 <br /> Trickle _240 -6.7 -5.7 -7.5 -7.4 -7.4 -6.9 <br />wF block 9.75* 1. 76 1.10 0.46 3.42 <br />wF treatment 19.75** 33.00** 3.75 3.27 3.59 <br /> <br />Z Mid-September = last irrigation applied in mid-September, mid-October = no irrigation <br />applied in September with the final irrigation made in mid-October, and trickle = <br />daily irrigation using a trickle system until September 1, at which time each tree <br />was limited to 60 gal. per week. '" lb. of urea per tree was inj ected into the <br />trickle irrigation system on October 23, the last irrigation of the year. <br /> <br />Y Each value is the T50 calculated from the mean of three observations for each deep- <br />freeze temperature treatment. Only temperatures with means between 10 and 90% tissue <br />survival were used in T50 calculations since the response curves are linear between <br />these 2 points. <br /> <br />x F values of a I-way analysis of variance. <br /> <br />w F values of a 2-way analysis of variance of data from a complete randomized block <br />design. <br /> <br />* Means significantly different at the 5% level. <br /> <br />** Means significantly different at the l% level. <br /> <br />*** New data obtained in 1975 <br /> <br />- 5 - <br />