i have a wheat, canola, wheat, lupin roation set up.
i want to grow weeds over the summer fallow if there is a 10 mm
rainfall event.
i want to let them grow for 14 days, then kill them (to simulate a
spray)
is it possible to do this?
is it possible for it to happen more than once in a fallow?
is it possible to do this after the harvest of the previous crop or
can the code only be written in before the sowing of the next crop
from january?
Use some management logic like
if (SummerFallowIn = 'yes' AND weed.plant_status = 'out' AND rain >
10) then
weed sow ...
endif
...
if (weed.das = 14) then
weed end_crop
endif
You may have to fiddle a bit with the definition of a fallow - that
depends on how you've done the rotations.
Also, you will want to stop shortly before (2 weeks?) the crop sowing
window opens.
Yours,
pdev
On Oct 28, 8:07 am, Jan Edwards <jan.edwa...@industry.nsw.gov.au>
wrote:
> i have a wheat, canola, wheat, lupin roation set up.
> i want to grow weeds over the summer fallow if there is a 10 mm
> rainfall event.
> i want to let them grow for 14 days, then kill them (to simulate a
> spray)
> is it possible to do this?
> is it possible for it to happen more than once in a fallow?
> is it possible to do this after the harvest of the previous crop or
> can the code only be written in before the sowing of the next crop
> from january?
peter
i have had a go with the management logic below.
it looks from the output file that i am growing weeds but they are not
being killed.
if next_crop = wht_id then
!********weed growth in January
if weed.plant_status = 'out' and day >= 1 and day <= 89 and rain
[1] >= 10 then
weed sow plants = 5, sowing_depth =10, cultivar =
bsmillet, row_spacing = 25, crop_class = summer_grass
endif
if (weed.das = 14) then
weed end_crop
endif
!********sowing date 1st May to 15 May
if wheat.plant_status = 'out' and day >= 121 and day <= 135 and
rain[3] >= 25 then
wheat sow plants = 100, sowing_depth = 30, cultivar =
sunstate, row_spacing = 25, crop_class = plant
fertiliser apply amount = wsowing_applic (kg/ha), depth =
50 (mm), type = urea_N
wN_at_sowing = wsowing_applic
endif
if wheat.plant_status = 'out' and day = 135 then
wheat sow plants = 100, sowing_depth = 30, cultivar =
sunstate, row_spacing 25, crop_class = plant
fertiliser apply amount = wsowing_applic (kg/ha), depth = 50
(mm), type = urea_N
wN_at_sowing = wsowing_applic
endif
endif
> peter
> i have had a go with the management logic below.
> it looks from the output file that i am growing weeds but they are not
> being killed.
> if next_crop = wht_id then
> !********weed growth in January
> if weed.plant_status = 'out' and day >= 1 and day <= 89 and rain
> [1] >= 10 then
> weed sow plants = 5, sowing_depth =10, cultivar =
> bsmillet, row_spacing = 25, crop_class = summer_grass
> endif
> if (weed.das = 14) then
> weed end_crop
> endif
> !********sowing date 1st May to 15 May
> if wheat.plant_status = 'out' and day >= 121 and day <= 135 and
> rain[3] >= 25 then
> wheat sow plants = 100, sowing_depth = 30, cultivar =
> sunstate, row_spacing = 25, crop_class = plant
> fertiliser apply amount = wsowing_applic (kg/ha), depth =
> 50 (mm), type = urea_N
> wN_at_sowing = wsowing_applic
> endif
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