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Risk Assessment of Unsuitable Winter Conditions for Manure and Nutrient Application across Ontario

Dep. of Land Resource Science, Univ. of Guelph, Guelph, ON, Canada, N1G 2W1

View larger version (13K): [in this window] [in a new window]   Fig. 1. Location of the seven Ontario study sites.

View larger version (23K): [in this window] [in a new window]   Fig. 2. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Emo. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (21K): [in this window] [in a new window]   Fig. 3. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Guelph. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (22K): [in this window] [in a new window]   Fig. 4. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Harrow. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (23K): [in this window] [in a new window]   Fig. 5. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Kapuskasing. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (21K): [in this window] [in a new window]   Fig. 6. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Mount Forest. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (22K): [in this window] [in a new window]   Fig. 7. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Ottawa. One in 500 yr (0.002) probability spring start and fall end dates are indicated.

View larger version (20K): [in this window] [in a new window]   Fig. 8. Probability of exceeding the three criteria [(i) a frost depth greater than 0.05 m; (ii) a snow accumulation of greater than 0.05 m; and (iii) a soil volumetric water content greater or equal to that of the plastic limit for the soil] in Smithfield. One in 500 yr (0.002) probability spring start and fall end dates are indicated.