ontario sugar beet growers - Atrium - University of Guelph

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1. PRODUCTION BENEFITS OF IRRIGATION ACROSS VARIOUS SEED CORN INBREDS Sixteen commercial seed corn inbreds were evaluated towards their reaction to irrigation at a location on the Ridgetown campus. Seed corn was seeded using a commercial seed corn planter on May 30,2005. Each inbred was planted in 2 rows x 60m row lengths having a row spacing of O.Em arranged in a 16 inbred x 2m x 6m blocks arranged in a randomized block design replicated 6 times. Plots were designed to be irrigated at intervals when the soil moisture dried down to 50% and 65% soil water holding capacity as in previous years using the soil budget approach. This required soil sample analysis including bulk density, soil volumetric and moisture determinations. The calculations became unworkable apparently due to the gravelly loam soil type and the soil became extremely dry requiring a change in the timing approach. The irrigation events were actually applied on a weekly (50% - Irr 5 times) or twice weekly basis (65% - Irr 7 times). 65% WHC - twice weekly- Irr 7 times June 28 July 7 July 11 July 14 August 2 August 9 August 17 50% WHC - weekly - Irr 5 times June 28 July 11 Julv 14 August 9 August 17 Water Added (" per sq.ft.) 1 1 1 1 1 2 2 1 1 1 2 2 Water was added by hose, applying approximately I ," of water per sq.ft. Fig. 1. Watering p by hose.
Capacitance Probes (C-Probes) were installed on June 10,2005 by the Ontario Weather Network team in the second replicate block in each of the three irrigation regimes. Figs. 2 and 3. Fig. 2. Installation of a C-Probe showing the two top soil moisture sensor rings with probe being inserted into a PVC access tube. Fig. 3. Location of C-probe connected to Adcon telemetry device. A Capacitance Probe (C-Probe) A C-Probe is a soil moisture-monitoring device that records volumetric soil moisture. The probes (Model C-probe, Agrilink Holdings Pty Ltd., Australia) are based on frequency domain reflectometry which takes advantage of the fact that soil electrical capacitance is highly dependent on soil water content. The C-probes communicate with the logger via hi-resolution analog signals, allowing a maximum of 6 sensors, (we used 5 sensors at 10, 30,50,70 and 100 cm depths), to be attached to a probe in a single soil profile. The sensorlprobe combination (shown in Fig. 2) is inserted into a PVC tube inserted into the soil and the probe performs a measurement whenever requested by the Adcon datalogger system Fig. 3 (we recorded every 15 minutes). The Ontario Weather Network (OWN) weather stations used Adcon Telemetry, GmbH radios, which transmit data to a local base station where the sensor data is logged. The OWN calls into the station and collects the data where it is plotted and analyzed. Assessments were taken by rating the early seedling growth of each inbred on June 23 recording the degree of drought spiking, with 0 indicating the plant showed spiking symptoms, Fig. 4, while a 10 indicated the seedling was not visually effected by the drought and looked normal, Fig. 5. On the same assessment date the colour of the seedling foliage was recorded, whether it was a normal green colour, given a rating of 5 with seed corn that had turned yellow a rating of 1 and seedlings turning purple a rating
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Submitted to the ONTARIO SUGAR BEET
Page 3 and 4:
SPECIAL ACKNOWLDEGMENTS I wish to p
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REPORTS IRRIGATION STRATEGIES FOR S
Page 7 and 8:
Research Results and Milestone Stat
Page 9 and 10:
applications, severely costing the
Page 11 and 12:
Table 1. Foliar disease control rat
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CROP: Sugar beet (Beta vulgaris L.)
Page 15 and 16: Table la. Cercospora Foliar disease
Page 17: BeetCast Evaluation for the Control
Page 20 and 21: CROP: Sugar beet (Beta vulgaris L.)
Page 23 and 24: CROP: PEST: Sugar beet (Beta vulgar
Page 25 and 26: CONTROL OF RHlZOCTONlA CROWN ROT IN
Page 27 and 28: Table 1. Effect of fungicides appli
Page 29 and 30: Table 1. Foliar insect damage ratin
Page 31 and 32: CROP: Sugar beet (Beta vulgaris L.)
Page 33 and 34: effective in combating the crown ro
Page 35 and 36: Table 1. Field assessments of sugar
Page 37 and 38: Table 1. Common leaf rust ratings i
Page 39 and 40: IRRIGATION STRATEGIES FOR SUGAR BEE
Page 41 and 42: Fig. 1. Irrigation test sites, Mich
Page 43: Fig. 5. Commercial Pivot Irrigation
Page 50 and 51: Irr 1-7: dates where grower applied
Page 52 and 53: Fig. 8b. Location A Pivot Irrigatio
Page 54 and 55: COMMENTS: Location A CONTROL lOcm T
Page 56 and 57: Fig. 9a Location B Control 10cm Dep
Page 58 and 59: 1Ocm Depth Hand lrrigated (Reif) -
Page 60 and 61: SUGAR BEET MELD AND SUGAR CONTENT O
Page 62 and 63: COMMENTS The reference ETo at each
Page 64 and 65: graphs indicated that too much wate
Page 68 and 69: of 10 (Fig. 6). Plant growth charac
Page 70 and 71: Table 1: Seed corn irrigation analy
Page 72 and 73: Fig. 8. Irrigation plot layout show
Page 74 and 75: Cob Length Irrigation significantly
Page 76 and 77: Seed Corn Yields Irrigation signifi
Page 78 and 79: BENEFITS OF IRRIGATING SEED CORN IN
Page 80 and 81: C-probe Scaled Frequency Unit V I +
Page 82 and 83: CONCLUSIONS: The initial intent was
Page 84 and 85: Fig. >rip tape along side of seed c
Page 86 and 87: Table 8b: Drip Irrigation - Seed co
Page 88 and 89: Fig. 18. Drip Irrigation - Non-irri
Page 90 and 91: Fig. 20. Rainfall accumulations in
Page 92 and 93: Fig. 22. Soil moisture profile in f
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ontario sugar beet growers - Atrium - University of Guelph

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