General Input Requirements The directory is named after the field location and year of the data collection. Each directory holds the files needed to run the cotton model. 1. Field Attributes (Filename.INI). Data include the start and stop date of simulation provided by the cooperator, latitude, row spacing, plants per row foot, variety planted and emergence date. Planting dates and harvest dates are provided when available. 2. Soil Hydrology (Soilname.HYD). Data include diffusivity, bulk density and moisture retention values (potential and water content). The percent sand and percent clay content are also included for each soil horizon when available. 3. Initial Soil Fertility (Filename.INT). Data include initial ammonia and nitrate concentrations, organic matter content, and moisture content of the soil at 15-cm intervals in the upper one meter of soil. Values of 0 for residual nitrate and ammonia are reinitialized to standard values in the cotton model itself. 4. Irrigation and Fertilizer (Filename.IRR). Data include the date, amount, method and cost of each irrigation application and the date, type (ammonia, nitrate, urea), cost, method, and location of each fertilizer application. 5. Plant Growth Regulator (Filename.PGR). Data are for the amount of chemicals applied, the date and the method of applications. 6. Weather (Filename.ACT). Data include daily values for maximum and minimum temperatures, wind run, rainfall, and solar radiation. Some of the weather files may have headers that indicate their creation date and comments. Comment lines may indicate dates of probable errors in one or more sensors (measuring weather parameters). Tables 1 to 6 are representatives of each of the six preceeding data files, respectively. These input files are stored in free formatted ASCII form. The directory also contains field observations (Filename.OBS) in ASCII format with headers and units defined. Dates of occurrences of phenological events and final yield are given when available. Values of -1 denotes no observation for that date. The VanGenuchten parameters (Soilname.VGT) will be provided as they become available (Table 7 is a sample of the Van Genuchten data file). Hard copies of the soil hydrology data file will be provided to those needing to develop their own Van Genucten data file. NOTE: YieldOnly Subdirectory contains the files that only have actual yield data. If Filename.OBS file is in the directory, it contains dates of phenological events and yield. Otherwise, the yield data is stated in the comment/desription line of the Filename.INI. Table 1. Sample Field Attributes file DRK200.INI. ________________________________________________ 'DRK200.INI' 'Dan Krieg 1994 cv. HS 200' ' ' '05/24/94' ' ' '05/14/94' '09/28/94' 35 4.600 0 32 ________________________________________________ 1st line = Field attributes file name 2nd line = File description, identification of cultivar 3rd line = Field Practices Dates columns: 1 = Planting date 2 = Emergence date 3 = Harvest date 4th line = Simulation dates columns: 1 = Starting date of simulation 2 = Stop date of simulation 5th line = Blank line 6th line: Cultural input data columns: 1 = Latitude 2 = Number of plants per linear foot 3 = Width of skip row, in. 4 = Row spacing, in. Table 2. Sample soil hydrology data file. _____________________________________________________________________ 'marriet6.hyd' 'Marietta loam,PSRC-MSU,Soil Temp., Farhad, 1992' 3 5.9360e-005 1.5900e-001 5.0950e+001 4.5700e-001 2.0600e-001 1.5400e-001 2.0000e-002 1.3030e+000 5.9360e-005 1.5900e-001 5.0950e+001 4.5700e-001 2.0600e-001 1.5400e-001 2.0000e-002 1.3030e+000 4.7000e+001 4.3100e-001 0.0000e+000 1.0000e+000 -3.3300e-001 201 19 5.9360e-005 1.5900e-001 5.0950e+001 4.5700e-001 2.0600e-001 1.5400e-001 2.0000e-002 1.3030e+000 42 22 42 1.4730e-004 2.0600e-001 6.9790e+001 4.0300e-001 2.4700e-001 2.0100e-001 1.6800e-001 1.4640e+000 33 28 201 4.9210e-004 2.8500e-001 7.9160e+001 4.3100e-001 3.3700e-001 2.8000e-001 2.6000e-002 1.3800e+000 33 31 ______________________________________________________________________ 1st line = Soil hydrology data file name 2nd line = Soil file description 3rd line = Number of soil horizons i.e., 3 4th line: Data for cultivated condition columns: 1 = Hydraulic Diffusivity at -15000 cm potential, cm2 day-1 2 = Volumetric H20 content at -15,000 cm potential, cm3 H2O cm-3 soil 3 = Hydraulic conductance, cm3 soil cm-3 H2O 4 = Saturated volumetric water content, cm3 H2O cm-3 soil 5th line: Data for cultivated condition (continuation) columns: 1 = Volumetric water content at field capacity, cm3H2O cm-3soil 2 = Residual volumetric water content, cm3 H2O cm-3 soil 3 = Volumetric water content in air dry soil, cm3 H2O cm-3 soil 4 = Bulk density, g cm-3 6th line: Data for wheel traffic condition columns: 1 =Hydraulic diffusivity at -15,000 cm potential, cm2 day-1 2 = Volumetric H20 content at -15,000 cm potential, cm3 H2O cm-3 soil 3 = Hydraulic conductance, cm3 soil cm-3 H2O 4 = Saturated volumetric water content, cm3 H2O cm-3 soil 7th line: Data for wheel traffic condition (continuation) columns: 1 = Volumetric water content at field capacity, cm3 H2O cm-3 soil 2 = Residual volumetric water content, cm3 H2O cm-3 soil 3 = Volumetric water content in air dry soil, cm3 H2O cm-3 soil 4 = Bulk density, g cm-3 8th line: Data for handling water table presence in the profile columns: 1 = 'Time days' factor for calculating movement of water table 2 = Volumetric water content at field capacity, cm3 H2O cm-3 soil 3 = Boundary theta slope for calculating movement of water table 4 = Boundary ratio for calculating movement of water table 5 = Water potential at field capacity, cm3 H2O cm-3 soil 6 = Depth to water table from soil surface, cm 9th line: Data for first soil horizon columns: 1 = Depth of the layer, cm 2 = Hydraulic diffusivity at -15,000 cm potential, cm2 day-1 3 = Volumetric H20 content at -15,000 cm potential, cm3 H2O cm-3 soil 4 = Hydraulic conductance, cm3 soil cm-3 H2O 5 = Saturated volumetric water content, cm3 H2O cm-3 soil 10th line: Data for first soil horizon (continuation) columns: 1 = Volumetric water content at field capacity, cm3H2O cm-3soil 2 = Residual volumetric water content, cm3 H2O cm-3 soil 3 = Volumetric water content in air dry soil, cm3 H2O cm-3 soil 4 = Bulk density, g cm-3 5 = Percent sand 6 = Percent clay 11th and 12th line: Data for second soil horizon (same as 9th and 10th line) 13th and 14th line: Data for third soil horizon (same as 9th and 10th line) Table 3. Sample initial soil fertility data file. __________________________________________________ 'DUNDEE1.INT' ' ' 5 5 1.390000 100 3 7 1.110000 100 3 12 0.840000 100 2 18 0.630000 100 7 16 0.580000 100 8 20 0.580000 100 0 0 0.00E+00 100 0 0 0.00E+00 100 0 0 0.00E+00 100 0 0 0.00E+00 100 0 0 0.00E+00 100 0 0 0.00E+00 100 ___________________________________________________ 1st line = Initial soil fertility data file name 2nd line = Comment or description 3rd to 14th line: Initial soil ferility and moisture status Columns: 1 = Residual ammonium content, lbs N acre-1 2 = Residual nitrate content, lbs N acre-1 3 = Percent organic matter content 4 = Water content % field capacity Table 4. Sample Irrigation and Fertilizer data file. _________________________________________________________ 'COLE90.IRR' 'Inputs for Coleman 1990 4th cultivation' '07/02/90' 0.000 0.000 0 2 0.750 0 0.000 30.000 0.000 0.000 1 8 6 _________________________________________________________ 1st line = Agricultural inputs data file name 2nd line = Description 3rd line = Calendar date 4th line: Irrigation application and cultivation data Columns: 1 = Amount of irrigation water applied, in. 2 = Cost of irrigation water applied, $ 3 = Method of irrigation application used Code: 0 = Sprinkler 1 = Furrow 2 = Drip 3 = Alternate Furrow 4 = Alternate Drip 4 = Depth of cultivation, in. 5 = Cost of cultivation, $ 6 = Tire width, in. 5th line: Fertilizer applications data Columns: 1 = Amount of NH4 fertilizer applied, lbs N acre-1 2 = Amount of NO3 fertilizer applied, lbs N acre-1 3 = Amount of urea fertilizer applied, lbs N acre-1 4 = Total cost of fertilizer applied, $ 5 = Method of fertilizer application Code: 0 = Broadcast 1 = Sidedress 2 = Foliar 3 = Broadcast not incorporated 4 = Fertigation 6 = Horizontal placement of side-dressed fertilizer, in. 7 = Vertical placement of side-dressed fertilizer, in. Table 5. Sample Plant Growth Regulator data file. ___________________________________________________ 'kranch97.pgr' 'King Ranch 1997 Precision Farming Project' '08/15/97' 'PREP' 2 0 0.000 2.000 3 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ' ' 2 0 0.000 0.000 1 ___________________________________________________ 1st line = Plant growth regulators data file name 2nd line = Description 3rd line = Calendar date 4th to 13th line: Plant growth regulator applications data Columns: 1 = Chemical applied, string 2 = Method of plant growth regulator application used Code: 0 = Banded 1 = Sprinkler 2 = Broadcast 3 = Band width of application, in. 4 = Cost of plant growth regulator, $ 5 = Rate of plant growth regulator application 6 = Units of applied plant growth regulator Code: 0 = pts/ac 1 = gal/ac 2 = oz/ac 3 = lb/ac 4 = a/lb 5 = ac/gal Table 6. Sample weather data file. ___________________________________________________________________ Julian Calendar Solar Temperature Daily Wind day day Radiation Max Min Rainfall Run ly oF in miles d-1 ___________________________________________________________________ 187 '07/06' 513 90 73 0.00 72.30 188 '07/07' 313 83 73 0.02 58.66 189 '07/08' 580 94 73 0.00 58.47 190 '07/09' 642 97 76 0.00 95.90 191 '07/10' 665 97 77 0.00 113.30 ___________________________________________________________________ Table 7. Sample Van Genuchten data file. ________________________________________________________ 'MARRIETA6.VGT' 'Marietta loam, MSU Plant Science Research Center ' 3 19 0.536 0.153 0.206 3.740 0.097 1.536 49 0.465 0.202 0.247 1.190 1.127 1.446 200 0.490 0.259 0.337 0.220 0.313 1.237 ________________________________________________________ 1st line = Van Genucten data file name 2nd line = Comment or description 3rd line = Number of soil horizons i.e., 3 4th to 6th line: Data for each layer Columns: 1 = Depth of the layer, cm 2 = Saturated volumetric water content, cm3 H2O cm-3 soil 3 = Residual volumetric water content, cm3 H2O cm-3 soil 4 = Volumetric water content at field capacity, cm3 H2O cm-3 soil 5 = Saturated hydraulic conductivity, cm day-1 6 = Van Genucten parameter alpha 7 = Van Genucten parameter n