Mineral Nutrition Status of Valencia Orange 23


in groves with close plantings. However, the additional use of
nitrogen did not result in corresponding increase in fruit pro-
duction.

 TABLE 13.-THE RELATION OF NUMBER OF TREES PER ACRE TO
 FRUIT PRODUCTION, QUALITY AND MINERAL COMPOSITION.


Avg. trees/acre

No. groves ......


Yield
 (Boxes/tree)

N. appl.
 (lbs./tree) .....

N. appl.
 (lbs./box) .....

Yield
 (boxes/acre) .

N. appl.
 (lbs./acre) ......




Number groves.

Juice (percent
 by wt.) ...........

Brix (percent) ..

Acid (percent)

Ratio
 (Brix/acid) ....




N (percent) ......

P (percent) ........

 Statistical symbo


 Range (Trees/Acre)

45-54 55-64 65-74 75-84

49 59 71 78

17 58 41 7


 Production (Avg. 1953-1955)


 6.49 6.48 6.39


 3.72 3.49 3.39


 0.57 0.54 0.53


316 384 449


182 205 238


 Quality (1955)

 21 62 55


 53.2 52.8 52.3

 11.57 11.49 11.52

 1.04 1.07 1.09


 11.31 10.90 10.67


 Mineral Composition of

 0.84 0.89 0.92


Is:


0.091 0.100 0.100

n.s. no significant difference.


 6.28


 2.89


 0.46


490

228


 6


 54.0

 11.50

 1.13


 10.24


Fruit

 0.94

 0.106


* significant difference at 5% level.
** significant difference at 1% level.


Signifi-
cance


85-116

100

14


 4.13


 2.95


 0.71


411

295


17


50.4

11.42

1.18


9.78


0.94

0.100


I