ROLL  COTTON DEVELOPMENT ADVISORY
                                    MAY 19, 2013 
PLANTING                                                               +/- normal
DATE+-------------------------------------------------------------------------+
    |            |   |     |      |         |           |           |         |
    |            |   |   v |      |         |           |           |         |
2/1 ************************ 1215                                         +1 day
    |            |   | v   |      |         |           |           |         |
2/15*********************** 1138                                          +1 day
    |            |   |v    |      |         |           |           |         |
3/1 ********************* 1069                                            +2 days
    |            | v |     |      |         |           |           |         |
3/15******************* 936                                               +2 days
    |         v  |   |     |      |         |           |           |         |
4/1 ************** 711                                                     0 days
    |            |   |     |      |         |           |           |         |
    |           Pin Sus   1st     1"    Pk. Bloom    Cut-Out    Terminate     |
    |          head  Sq. Flowr   Boll   +---+---+   +---+---+   +---+---+     |
    |                                   S   M   F   S   M   F   S   M   F     |
    +-------+-------+-------+-------+-------+-------+-------+-------+-------+-+
    0      400     800     1200    1600    2000    2400    2800    3200    3600
               HEAT UNITS ACCUMULATED FROM  PLANTING to MAY 18
     v = Heat Units on MAY 11;  S,M,F = Short, Medium, and Full Season Varieties

  HEAT UNITS 
--------------------------------
Heat Unit (HU) accumulation since Jan 1 = 1332;  Last year = 1268
HUs since Jan 1 are running about 1 day behind normal.
HU last week = 137

HISTORICAL STATISTICS 
--------------------------------
  Last Week : MAY 12 - MAY 18             This Week : MAY 19 - MAY 25
           HIGH  LOW DEWPT HUs  RAIN               HIGH  LOW DEWPT HUs
  Normal     97   58   40  137  ----       Normal    97   59   43  140
  Recorded   97   58   48  137  0.00         2012    86   50   40   95

ESTIMATED WATER USE 
--------------------------------
      Planting date :     2/1    2/15      3/1    3/15     4/1
Water Use (last week):    1.05"    .95"     .86"    .68"    .42"

WEATHER UPDATE 
--------------------------------
--The mild weekend weather will end early in the week as high pressure settles
over AZ. Much warmer temperatures are expected by mid-week. Another storm system
is expected to pass north of AZ late in the week, producing breezy conditions &
slightly cooler temperatures. No precipitation is expected from this system.

--Revised long range forecasts were issued by the CPC last week. The forecast
for June shows a weak (SW AZ) to moderate (rest of AZ) bias for above normal
June temperatures. The long range forecast for the monsoon (Jul-Sep) is similar.
There is no bias in the precipitation forecasts for June & the monsoon season,
suggesting near normal precipitation in the coming months. Note that long range
forecast models rarely show a precipitation bias during the monsoon.

-N fertilizer should be applied in split applications between pinhead square &
early bloom (700-1200 HU after planting). See pub. AZ1200 on ACIS website.