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CRT Catalogue Pull-out Feature : Crop Feature - Winter 2013
There’s always better value at CRT. www.crt.com.au There’s always better value at CRT. Crop Protection TechUpdate–Winter2013 Issue 5 Winter 2013 Tech Update eNtrenchTM nitrogen stabiliser eNtrench is a nitrification inhibitor for use with nitrogen based fertilisers. Nitrification inhibitors reduce the bacterial conversion of ammonium nitrogen to nitrate nitrogen. This will retain more soil stable and usable nitrogen (ammonium) in the root zone of crops for use at key crop yield determining growth stages. To be effective eNtrench must be applied at a use rate of 2.5L/ha with the nitrogen fertiliser. The easiest application method is to mix eNtrench directly with a liquid nitrogen product, such as UAN, and apply the mix in the same manner as UAN would normally be applied by the grower. For example, in-furrow injection at seeding, soil applied through streaming nozzles, side dressed or applied through a boom sprayer. For use with granular nitrogen fertilisers, eNtrench must be applied into the same soil zone as the granular fertiliser. Trial results show that the best method to do this is as an in-furrow application of eNtrench and banded into the same soil zone as the granular fertiliser during the seeding operation. It is not advised to mix/coat granular fertilisers with eNtrench as the resulting mix may be too wet to accurately spread. Post-emergent applications are limited to use with liquid nitrogen products applied early post-emergent. The active ingredient in eNtrench (Nitrapyrin) works by inhibiting the activity of the soil bacteria Nitrosomonas. To be effective as a soil surface applied application, eNtrench must be incorporated into the soil by at least 12.5mm of rain (or irrigation) within 10 days of application. In season visual responses to eNtrench are often subtle and hard to detect with the naked eye. eNtrench will show the biggest responses in seasons that have enough rainfall to create significant leaching events and/or soil saturation events. The biggest benefit of applying eNtrench will be seen in seasons with wet winters and/or wet springs where nitrate losses due to leaching and/or denitrification will be highest. In seasons that do not see these conditions it is possible that growers will not see any benefit from eNtrench. Yield responses in trial work carried out so far around Australia in the 2011 and 2012 seasons have ranged from 0-33%, with median increases of 3-8% and protein levels have improved by greater than 1% point. 2011 and 2012 seasons were not big years for nitrogen loss, however, these median gains contributed to a significant gross margin per hectare improvement. Contact your local CRT agronomist to find out how eNtrench can potentially increase your gross margin per hectare. We know Agronomy We know Seed Treatment We know Broadacre Cropping We know Productivity Confidence in a drum
Crop Feature - Autumn 2013
CRT Spring 2013 - Tech Update