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Question 1. This statement is FALSE

4 main variables need to be present to promote denitrification. Severe losses generally only occur when there is an abundance of all four and are influenced by the duration of anaerobic conditions.

What strategies could be employed to minimise the impact of waterlogging? e.g. Split N, inhibitor, irrigation management, irrigation type, field layout, soil structure and stability

Question 2. This statement is FALSE

• The range of P % measured in Australian cotton seed is from 0.4 – 0.85 % P.
• Removal is also affected by the proportion of seed on raw cotton i.e. gin turnout %, higher GTO, lower removal
• The potential range of removal is therefore 1.2 – 2.7 kg P/bale
• For more info, search Pro Cotton Nutrition e-library at The Back Paddock display

If you are using standard P removal figures to calculate your application rate, how does this knowledge affect your understanding of the likely soil P status in the future?

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