MARICOPA MAR 3, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********** | *** 206 ** | ********** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 2 v = Heat Units accumulated from JAN 1 - FEB 23 HEAT UNITS -------------------------------- HUs are running about 9 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 24 - MAR 2 This Week : MAR 3 - MAR 9 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 71 41 32 41 ---- Normal 74 42 32 48 Recorded 69 33 20 29 0.00 2012 73 37 32 43 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 55 MAR 2 ; Min = 44.1 FEB 25 WEATHER UPDATE -------------------------------- -Expect sunny, warm & dry conditions through Thursday. Another cold storm system is projected to develop late this week, resulting in below normal temperatures & a chance for precipitation Friday/Saturday. Temperatures are expected to return to normal levels by early next week. -Growers are encouraged to measure soil temperatures prior to planting. Soils are quite cool due to the cold winter weather. Soil temperatures at 8am at seed- ing depth should approach 60F prior to planting. A good weather forecast for planting would call for sunny skies with highs above 80F & lows above 47F. Soil temperatures generally remain in the acceptable range for germination under these conditions. MARICOPA MAR 10, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************* | **** 255 **** | ************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 9 v = Heat Units accumulated from JAN 1 - MAR 2 HEAT UNITS -------------------------------- HUs are running about 8 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 3 - MAR 9 This Week : MAR 10 - MAR 16 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 74 42 32 48 ---- Normal 77 44 31 60 Recorded 73 44 37 47 0.57 2012 81 43 24 68 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 60.6 MAR 8 ; Min = 51.3 MAR 9 WEATHER UPDATE -------------------------------- -High pressure will develop over AZ this week, producing sunny & dry conditions with above normal temperatures. Temperatures should peak late in the week with highs approaching 90F in central AZ & the low 90s along the River. Some cooling is expected next weekend as a low pressure system moves across the Great Basin. The current 8-14 day forecast calls for dry weather & a return to normal temper- atures by the middle of next week. Both the 6-10 day & 8-14 day forecasts may prove useful when planning planting operations. The internet addresses are: 6-10 day forecasts: http://www.cpc.ncep.noaa.gov/products/predictions/610day/ 8-14 day forecasts: http://www.cpc.ncep.noaa.gov/products/predictions/814day/ -A good planting forecast: sunny skies with highs above 80F & lows above 48F. MARICOPA MAR 17, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ***************** | ****** 333 ****** | ***************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 16 v = Heat Units accumulated from JAN 1 - MAR 9 HEAT UNITS -------------------------------- HUs are running about 4 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 10 - MAR 16 This Week : MAR 17 - MAR 23 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 77 44 31 60 ---- Normal 79 45 32 69 Recorded 83 43 39 79 0.00 2012 86 46 29 91 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61.7 MAR 16 ; Min = 48.9 MAR 10 WEATHER UPDATE -------------------------------- --Mostly sunny & dry with mild temperatures this week. Temperatures will not be as warm as last week, but will remain above normal. A series of storms will pass through the Great Basin this week. These systems will produce periods of windy weather & some slight cooling after mid-week. The forecast for next week is less certain with one forecast model calling for more cooling while a second suggests much warmer weather. Growers should monitor forecasts if planting late this week. --A good planting forecast: sunny skies with highs above 80F & lows above 48F. --Medium term (6-10 & 8-14 day) forecasts can be obtained from the internet at: 6-10 day forecasts: http://www.cpc.ncep.noaa.gov/products/predictions/610day/ 8-14 day forecasts: http://www.cpc.ncep.noaa.gov/products/predictions/814day/ MARICOPA MAR 24, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************** | ********* 431 ******** | ********************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 23 v = Heat Units accumulated from JAN 1 - MAR 16 HEAT UNITS -------------------------------- HUs are running about normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 17 - MAR 23 This Week : MAR 24 - MAR 30 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 79 45 32 69 ---- Normal 78 46 32 65 Recorded 84 54 33 98 0.00 2012 72 43 28 42 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 64 MAR 19 ; Min = 58.3 MAR 23 WEATHER UPDATE -------------------------------- --High pressure will develop over AZ this week resulting in sunny, warm & dry conditions through Saturday. Temperatures should average about 5 degrees above normal. Medium term forecasts indicate a storm system will develop off the coast of CA late this week & move inland early next week. This system is expected to produce windy & cooler weather with a chance for precipitation. Growers should monitor the development of this storm if planning to plant late in the week. --Planting windows are open in central & western production areas. Full season varieties should be planted before the annual accumulation of heat units exceeds 700 (see graph above). --Soil temperatures are considered acceptable for germination when minimum (8am) soil temperatures at planting depth remain at 60F or higher. MARICOPA MAR 31, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************** | *********** 523 ********** | ************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAR 30 v = Heat Units accumulated from JAN 1 - MAR 23 HEAT UNITS -------------------------------- HUs are running about 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 24 - MAR 30 This Week : MAR 31 - APR 6 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 78 46 32 65 ---- Normal 81 48 33 76 Recorded 85 49 26 91 0.00 2012 88 50 32 100 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.7 MAR 30 ; Min = 57 MAR 24 WEATHER UPDATE -------------------------------- --A storm system located off the CA coast will move across the Great Basin on Monday, resulting in windy & slightly cooler conditions. No precipitation is expected with this storm system. The coolest day of the week will be Tuesday when temperatures should average near normal. High pressure will return on Wednesday, resulting in clear skies & very warm conditions through the weekend. --The planting windows are open for all production areas except Graham & Cochise Counties. Full season varieties should be planted before the annual accumulation of heat units exceeds 700 (see graph above). --Soil temperatures are considered acceptable for germination when minimum (8am) temperatures at planting depth remain at 60F or higher. Soils typically reach this acceptable thermal range when minimum air temperatures remain 48F or higher. MARICOPA APR 7, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************************* | ************** 629 ************ | ******************************* | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 6 v = Heat Units accumulated from JAN 1 - MAR 30 HEAT UNITS -------------------------------- HUs are running about 4 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 31 - APR 6 This Week : APR 7 - APR 13 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 81 48 33 76 ---- Normal 83 49 31 87 Recorded 86 53 31 105 0.00 2012 79 52 31 83 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.6 APR 5 ; Min = 60.6 APR 6 WEATHER UPDATE -------------------------------- --A strong storm will move across the Great Basin Monday & Tuesday, resulting in very windy conditions & much cooler temperatures. This is a relative dry storm, but light & scattered precipitation is possible Monday & Tuesday, especially in & adjacent to higher elevation areas (mountains). Temperatures will cool to below normal levels by Tuesday, then rebound to above normal levels by the weekend. --Soil temperatures are considered acceptable for germination when minimum (8am) temperatures at planting depth remain at 60F or higher. Soils typically reach this acceptable thermal range when minimum air temperatures remain 48F or higher. The cool temperatures expected early this week may push soil temperatures below this acceptable level for a few days. Growers in central & southeast AZ may want to delay planting until later in the week. A three-day delay in planting at this time of year delays peak bloom, cut-out and maturity by about one day. --Full season varieties should be planted before the annual accumulation of heat units (HU) exceeds 700. The 700 HU level will be reached in western AZ this week. MARICOPA APR 14, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************************ | **************** 714 *************** | ************************************ | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 13 v = Heat Units accumulated from JAN 1 - APR 6 HEAT UNITS -------------------------------- HUs are running about 4 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 7 - APR 13 This Week : APR 14 - APR 20 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 83 49 31 87 ---- Normal 85 50 30 95 Recorded 83 49 32 85 0.09 2012 82 46 31 79 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.4 APR 8 ; Min = 61 APR 10 WEATHER UPDATE -------------------------------- --A strong storm system will pass through the West early in week, resulting in windy & cooler conditions through Thursday. This is expected to be a dry storm with little chance for precipitation. Below normal temperatures are expected by mid-week with the passage of this system. High pressure will redevelop over AZ late in the week & bring a return to above normal temperatures by the weekend. --Plant population should range from 25,000-50,000 plants/a. To assess, count the number of plants in 1/1000a & multiply by 1000. The row length equal to to 1/1000a: 40"row = 13'1", 38"row = 13'9", 36"row = 14'6", 30"row = 17'5". --Full season varieties should be planted before the annual accumulation of heat units (HU) exceeds 700. Most central AZ production areas will reach 700 HUs this week. Short & medium maturity varieties are recommended after 700 HUs. MARICOPA APR 28, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************************************** | ********************* 924 ******************** | ********************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - APR 27 v = Heat Units accumulated from JAN 1 - APR 20 HEAT UNITS -------------------------------- HUs are running about 4 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 21 - APR 27 This Week : APR 28 - MAY 4 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 87 53 32 103 ---- Normal 90 55 30 116 Recorded 92 54 29 121 0.00 2012 86 59 28 120 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 71.6 APR 25 ; Min = 66.6 APR 21 WEATHER UPDATE -------------------------------- --Expect sunny & dry conditions through midweek with hot days & mild nights. A storm system will move through the Great Basin Thursday, producing cooler temp- eratures & windy conditions. The cooling trend will be limited with temperatures expected to remain slightly above normal. No precipitation is expected with this system. The longer term forecast for May shows a moderate bias for above normal temperatures & no bias relative to precipitation. --The transition from vegetative growth to early reproductive development occurs with the formation of the first fruiting branches at nodes 5-7. This transition, known as pinhead square (PHS), usually occurs at ~700 heat units after planting. MARICOPA MAY 5, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ***************************************************** | *********************** 1067 ************************ | ***************************************************** | | ^ normal | | PLANTING WINDOWS | | | Short Season ---------------| | | | Medium Season ----| | | | Full Season | | +---------+---------+---------+---------+---------+---------+---------+---+ 0 200 400 600 800 1000 1200 1400 HEAT UNITS (HU) ACCUMULATED FROM JAN 1 - MAY 4 v = Heat Units accumulated from JAN 1 - APR 27 HEAT UNITS -------------------------------- HUs are running about 5 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 28 - MAY 4 This Week : MAY 5 - MAY 11 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 90 55 30 116 ---- Normal 92 58 32 129 Recorded 96 60 24 143 0.00 2012 91 54 16 116 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 73.2 MAY 2 ; Min = 64.8 APR 28 WEATHER UPDATE -------------------------------- --Cooler & less settled weather is expected this week due to the presence of a trough of low pressure. This trough, currently off the coast of CA, wll send a series of waves & impulses across the region, resulting in cooler temperatures & a slight chance for showers Tuesday & Wednesday, especially near the mountains. This system moves inland & across AZ late in the week & & may produce another period of showers in eastern production areas. High pressure & much warmer temp- eratures are expected by the weekend. --The transition from vegetative growth to early reproductive development occurs with the formation of the first fruiting branches at nodes 5-7. This transition, known as pinhead square (PHS), usually occurs at ~700 HUs after planting (HUAP). N fertilizer should be applied in split applications between PHS & early bloom which occurs at ~1200 HUAP (see publication AZ1200 on ACIS website for details). MARICOPA COTTON DEVELOPMENT ADVISORY MAY 12, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | |v | | | | | | | 3/15****************** 878 +7 days | v | | | | | | | | 4/1 ************* 643 +3 days | v | | | | | | | | 4/15********* 446 +2 days | | | | | | | | | 5/1 **** 191 +1 day | | | | | | | | | | 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 11 v = Heat Units on MAY 4; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1197; Last year = 1075; Normal = 1107 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 129 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 5 - MAY 11 This Week : MAY 12 - MAY 18 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 92 58 32 129 ---- Normal 95 60 33 142 Recorded 88 60 37 129 0.00 2012 88 57 29 117 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .65" .44" .44" .44" WEATHER UPDATE -------------------------------- --The low pressure system responsible for the recent stretch of windy weather is expected to move out of Mexico Tuesday, opening the door for a return to hot & dry weather. There is a slight chance for thunderstorms in eastern AZ on Tuesday as this system moves out. Expect sunny & dry conditions late this week with temp- eratures exceeding 100F in lower desert areas. A slight cooling trend is expected this weekend as another dry storm system passes north of AZ. --The transition from vegetative growth to early reproductive development occurs with the formation of the first fruiting branches at nodes 5-7. This transition, known as pinhead square (PHS), usually occurs at ~700 HUs after planting (HUAP). N fertilizer should be applied in split applications between PHS & early bloom which occurs at ~1200 HUAP (see publication AZ1200 on ACIS website for details). MARICOPA COTTON DEVELOPMENT ADVISORY MAY 19, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | v | | | | | | 3/15********************* 1043 +7 days | v| | | | | | | | 4/1 **************** 808 +4 days | v | | | | | | | | 4/15************ 611 +3 days | v | | | | | | | | 5/1 ******* 356 +2 days | | | | | | | | | 5/15* 70 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 = 1362; Last year = 1192; Normal = 1249 HUs since Jan 1 are running about 5 days ahead of normal. HU last week = 165 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 12 - MAY 18 This Week : MAY 19 - MAY 25 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 95 60 33 142 ---- Normal 95 61 35 144 Recorded 98 66 34 165 0.00 2012 84 57 33 112 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.01" .62" .52" .52" .52" 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. MARICOPA COTTON DEVELOPMENT ADVISORY MAY 26, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | | 3/15************************ 1199 +8 days | | v | | | | | | | 4/1 ******************* 964 +5 days | v | | | | | | | | 4/15*************** 767 +3 days | v | | | | | | | | 5/1 ********** 512 +2 days | | | | | | | | | 5/15***** 226 +1 day | | | | | | | | | | 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 25 v = Heat Units on MAY 18; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1518; Last year = 1304; Normal = 1393 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 157 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 19 - MAY 25 This Week : MAY 26 - JUN 1 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 95 61 35 144 ---- Normal 97 63 35 152 Recorded 98 63 27 157 0.00 2012 95 61 27 147 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.35" .94" .59" .55" .55" WEATHER UPDATE -------------------------------- --Breezy & cooler weather is expected early in the week as a trough of low pres- sure moves across the Great Basin. High pressure will develop with the passage of this system & is expected to produce the hottest temperatures of the season. No precipitation is expected this week. --Growers should closely monitor soil moisture & avoid water stress. Evaporative demand is running above normal due to the windy & dry spring weather. Water stress reduces plant stature & can produce square abortion. -N fertilizer should be applied in split applications between pinhead square & early bloom (700-1200 HU after planting). See pub. AZ1200 on ACIS website. MARICOPA COTTON DEVELOPMENT ADVISORY JUN 2, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | v | | | | | 3/15*************************** 1366 +8 days | | |v | | | | | | 4/1 *********************** 1131 +5 days | |v | | | | | | | 4/15******************* 934 +4 days | v | | | | | | | | 5/1 ************** 679 +3 days | v | | | | | | | | 5/15******** 393 +2 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 JUN 1 v = Heat Units on MAY 25; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1685; Last year = 1451; Normal = 1545 HUs since Jan 1 are running about 6 days ahead of normal. HU last week = 167 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 26 - JUN 1 This Week : JUN 2 - JUN 8 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 97 63 35 152 ---- Normal 100 64 34 161 Recorded 99 66 27 167 0.00 2012 93 57 27 133 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 1.46" 1.09" .78" .49" .49" WEATHER UPDATE -------------------------------- --Sunny, hot & dry conditions will continue across AZ this week. Expect a few degrees of cooling early in the week followed by a return to very hot conditions late in the week. No precipitation is expected this week. --Last week produced the hottest temperatures of the growing season & more heat is expected this week. June is an important month for crop development & fruit set. Water stress at this time of year can reduce plant stature & lead to square abortion. Growers are encouraged to monitor soil moisture closely & avoid water stress through timely irrigations. MARICOPA COTTON DEVELOPMENT ADVISORY JUN 9, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | | | | v | | | | | 3/15******************************* 1557 +9 days | | | v| | | | | | 4/1 ************************** 1322 +6 days | | |v | | | | | | 4/15********************** 1125 +5 days | v | | | | | | | 5/1 ***************** 870 +4 days | v | | | | | | | | 5/15************ 584 +3 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 JUN 8 v = Heat Units on JUN 1; S,M,F = Short, Medium, and Full Season Varieties HEAT UNITS -------------------------------- Heat Unit (HU) accumulation since Jan 1 = 1876; Last year = 1584; Normal = 1706 HUs since Jan 1 are running about 7 days ahead of normal. HU last week = 191 HISTORICAL STATISTICS -------------------------------- Last Week : JUN 2 - JUN 8 This Week : JUN 9 - JUN 15 HIGH LOW DEWPT HUs RAIN HIGH LOW DEWPT HUs Normal 100 64 34 161 ---- Normal 101 65 35 166 Recorded 106 73 33 191 0.00 2012 99 64 25 160 ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 5/15 Water Use (last week): 2.12" 1.68" 1.3" .82" .59" WEATHER UPDATE -------------------------------- --Sunny, hot & dry conditions will continue across AZ this week. Daytime Temp- eratures will approach 110F in low elevation production areas. Nights will remain on the mild side due the very low humidity. --Long range forecasts for June & the monsoon (July-September) indicate a mod- erate bias for above normal temperatures & no bias relative to precipitation. --June is an important month for crop development & fruit set. The hot & dry forecast will ensure high rates of water use in the coming weeks. Water stress at this time of year can reduce plant stature & lead to square abortion. Monitor soil moisture closely & avoid water stress through timely irrigations.