Supporting Images II - Chapter 12.

Figure 7.
Seed-placed nitrogen fertilizer can reduce the winter-hardiness of wheat plants. Placement of 60 lb ammonium nitrate nitrogen/acre (67 kg/ha) in the seed row caused severe winter damage in the trial pictured above.

Figure 8.
Spring regrowth of winter wheat. The plant on the left initiated some new leaf growth but failed to produce new roots in the spring. It will die as soon as the crown reserves are exhausted. The plant on the right has produced both new leaves and roots. It will survive.

Figure 9.
A closer look at the crown of a viable winter wheat plant showing new white roots produced in the spring.

Figure 10.
Fall tilled or conventional summerfallow fields have poor snowtrapping capabilities. Snow either drifts into small dunes or off the field completely. This results in variable snowcover and abrupt changes in crop winter stress levels.

Figure 11.
An example of the variation in minimum FSI required to produce an undamaged winter cereal stand in a field with poor snowtrapping capabilities, such as most summerfallow fields. An estimate of the snowcover depth on this area can be obtained utilizing the values given in Table 4.

Figure 12.
Patchy survival pattern that often occurs when winter wheat is seeded on summerfallow in Saskatchewan. Areas that are green survived under snow banks (dunes) during the coldest part of the winter.