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Task ID:  2026  create a plant_status = dead for ozcot    
Created by ver078 on 2015-01-22 5:38 PM, 1485 days ago
Project:  Module Code
Category:  Minor
Priority:  [no priority]
Assigned to:  joh491  
Status:  closed
Apsim Version:7.7
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 comment 40316 posted by joh491 on 2016-03-23 2:00 PM, 1060 days ago 

Included in patches for 7.8 release.

 comment 40283 posted by joh491 on 2016-03-17 11:56 AM, 1066 days ago 

plant_status = dead added  as well as event kill_crop

 comment 40187 posted by joh491 on 2016-03-10 2:27 PM, 1073 days ago 

Issues exist with defining when a crop is truely 'dead'.  Cotton can regrow after very dry conditions.  Reviewing with Mike Bange.

 comment 35756 posted by ver078 on 2015-01-22 5:47 PM, 1485 days ago 

There does not seem to be a way to detect when a cotton crop has died.

Even when the cotton crop has clearly died due to water stress, smi at 0.1 and lost all its leaves, and the biomass has stopped increasing etc. but the roots will still keep on growing and the plant_status still remains alive. 

It looks like ozcot only has two states for plant_status (alive and out).

This tends to cause problems with all your manager rules that use plant_status = 'alive' in their if statements. 

Perry mentioned that you have to manually write your own rules to kill the crop. I think there is also a defoliant manager command.

Ozcot does not die of its own natual causes due to water stress.It would be good to come up with some sort of natural death of cotton.