PINAL COUNTY MAR 3, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********** | *** 202 ** | ********** | | ^ 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 10 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : FEB 24 - MAR 2 This Week : MAR 3 - MAR 9 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 72 40 32 40 Normal 74 42 32 47 Recorded 69 31 35 27 2012 73 37 33 43 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 55 MAR 2 ; Min = 44.1 FEB 25 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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. PINAL COUNTY MAR 10, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************ | **** 247 *** | ************ | | ^ 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 9 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 3 - MAR 9 This Week : MAR 10 - MAR 16 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 74 42 32 47 Normal 76 43 32 58 Recorded 73 43 33 45 2012 81 41 26 67 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 60.6 MAR 8 ; Min = 51.3 MAR 9 Last Week's Rain : Maricopa = .57 " Coolidge = .84 " 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. PINAL COUNTY MAR 17, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | **************** | ****** 323 ***** | **************** | | ^ 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 5 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 10 - MAR 16 This Week : MAR 17 - MAR 23 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 76 43 32 58 Normal 79 44 32 68 Recorded 83 42 26 76 2012 86 44 32 88 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 61.7 MAR 16 ; Min = 48.9 MAR 10 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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/ PINAL COUNTY MAR 24, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************** | ******** 410 ******* | ******************** | | ^ 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 2 days behind normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 17 - MAR 23 This Week : MAR 24 - MAR 30 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 79 44 32 68 Normal 78 45 32 63 Recorded 83 51 32 88 2012 72 41 30 42 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 64 MAR 19 ; Min = 58.3 MAR 23 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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. PINAL COUNTY MAR 31, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************* | ********** 499 ********** | ************************* | | ^ 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 normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 24 - MAR 30 This Week : MAR 31 - APR 6 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 78 45 32 63 Normal 80 46 34 74 Recorded 85 47 30 88 2012 88 48 34 96 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.7 MAR 30 ; Min = 57 MAR 24 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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. PINAL COUNTY APR 7, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ****************************** | ************* 595 ************ | ****************************** | | ^ 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 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : MAR 31 - APR 6 This Week : APR 7 - APR 13 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 80 46 34 74 Normal 83 48 32 84 Recorded 86 50 34 97 2012 78 51 34 78 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.6 APR 5 ; Min = 60.6 APR 6 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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. PINAL COUNTY APR 14, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ********************************** | *************** 671 ************** | ********************************** | | ^ 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 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 7 - APR 13 This Week : APR 14 - APR 20 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 83 48 32 84 Normal 85 48 32 92 Recorded 81 48 34 76 2012 82 44 33 72 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 66.4 APR 8 ; Min = 61 APR 10 Last Week's Rain : Maricopa = .09 " Coolidge = .17 " 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. PINAL COUNTY APR 28, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ******************************************* | ******************** 861 ****************** | ******************************************* | | ^ 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 1 day ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 21 - APR 27 This Week : APR 28 - MAY 4 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 86 52 33 99 Normal 90 53 31 111 Recorded 91 52 36 112 2012 86 54 30 110 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 71.6 APR 25 ; Min = 66.6 APR 21 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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. PINAL COUNTY MAY 5, 2013 COTTON PLANTING DATE ADVISORY +-------------------------------------------------------------------------+ | v | ************************************************** | *********************** 994 ********************** | ************************************************** | | ^ 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 2 days ahead of normal. HISTORICAL STATISTICS -------------------------------- Last Week : APR 28 - MAY 4 This Week : MAY 5 - MAY 11 HIGH LOW DEWPT HUs HIGH LOW DEWPT HUs Normal 90 53 31 111 Normal 92 56 33 123 Recorded 95 57 30 134 2012 92 51 18 110 SOIL TEMPERATURES -------------------------------- Last Week's 8am Soil Temp: Max = 73.2 MAY 2 ; Min = 64.8 APR 28 Last Week's Rain : Maricopa = 0 " Coolidge = 0 " 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). PINAL COUNTY COTTON DEVELOPMENT ADVISORY MAY 12, 2013 PLANTING +/- normal DATE+-------------------------------------------------------------------------+ | | | | | | | | | | v | | | | | | | 3/15**************** 804 +5 days | v | | | | | | | | 4/1 ************ 586 +1 day | v | | | | | | | | 4/15******** 410 +1 day | | | | | | | | | 5/1 **** 177 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 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 = 1112; Last year = 1032; Normal = 1063 HUs since Jan 1 are running about 2 days ahead of normal. HU last week = 117 HISTORICAL STATISTICS -------------------------------- Last Week : MAY 5 - MAY 11 This Week : MAY 12 - MAY 18 HIGH LOW HUs DEWPT HIGH LOW DEWPT HUs Recorded 88 57 117 38 2012 88 54 31 108 RAIN : Maricopa = 0 " Coolidge = 0 " ESTIMATED WATER USE -------------------------------- Planting date : 3/15 4/1 4/15 5/1 Water Use (last week): .53" .43" .43" .43" 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).