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4. Contents
Module page
1 Getting started 5
2 Crop nutrition 9
3 Land preparation 13
4 Planting 19
5 Seed treatment 23
6 Weed management 25
7 Green or grain decision, stubble management
and grain gross margins 29
8 Pest management and irrigation 31
9 Harvesting and marketing 41
Appendix
I Industry contacts 55
II Grower declaration form 57
5. About this manual
This manual was originally compiled in 2005 by the authors as a reference tool
for Queensland coastal sugarcane growers keen to diversify into complimentary
fallow legume grain crops, in this case soybeans. Increasing demand and interest
in grain legumes as a rotational crop saw the need to revise the manual for an
additional series of soybean growing courses held in 2008.
The manual consists of course notes separated into nine modules, for both ease
of information transfer and ability to insert future information updates.
Use this manual in conjunction with these additional reference materials:
‘Mungbean and Soybean Disorders: The Ute Guide’ (GRDC, 2003). Available
from The Queensland Government Bookshop website www.bookshop.qld.
gov.au or phone 13 13 04.
‘What soybean insect is that?’ DPIF (Brier et al., 2004). Available from
QPIF Business Information Centre 13 25 23
www.dpi.qld.gov.au look for plantsfield cropssoybean
The authors would like to acknowledge that the course notes have been collated
from an extensive range of industry sources, including DPIF Crop Notes, NSW
DPI Agfacts, Australian Oilseeds Federation (AOF) and Cargill Australia.
The authors would also like to thank the following individuals for their
assistance in providing valuable information for this manual: Mike Lucy, Mike
Bell, Jim Barnes, Greg Mills, Prue Tatt, Andrew McCarrol (QPIF); Alan Garside
(BSES); Andrew James (CSIRO); and Pat McKey (Bettacrop). The authors would
particularly like to thank Hugh Brier for the generous use of the updated IPM
section.
This manual has been compiled by:
John Hughes Mike Hanks
Senior Agronomist (FutureCane) Senior Agronomist (FutureCane)
QPIF, Mackay Q 4740 QPIF, Townsville Q 4810
Ph. 07 4967 0657 Ph. 07 4760 1530
Last revised and updated: August 2009
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Please note
Reference to any proprietary products, persons or organisations in this manual
does not imply that Queensland Primary Industries and Fisheries (QPIF) endorses
any particular product or service, or that QPIF has any affiliation with persons
or organisations therein, unless expressly stated otherwise.
With respect to the reference material, readers should refer to the individual
document legal statements by the respective authors and organisations.
6. Soybean module 1
This module includes information on:
benefits of soybean fallow cropping
pre-season checklist
activity planning calendar
Why grow soybeans in the cane fallow?
There are a number of real benefits including:
to break soil borne disease cycles from continuous cane monoculture. There
is a consequent improvement in soil health and increases in root extension
and the efficiency of nutrient and water uptake.
the legume crop’s ability to fix atmospheric nitrogen and supply this
nutrient to the following crop. With recent large increases in fertiliser prices,
legume nitrogen can be a cost effective way of supplying nitrogen.
a general increase of 15-30% in the following plant cane crop yield.
providing a source of valuable organic matter (OM). Oganic matter:
is an important driver of biological diversity
improves the cation exchange capacity (CEC) of the soil and improves
the ability of the soil to hold nutrients
enhances the water holding capacity of the soil
reduces surface crusting
improves water infiltration and earthworm populations.
an opportunity to control specific weeds prevalent in cane monoculture.
an opportunity to improve cash flow with grain production.
environmental benefits from reduced inorganic fertiliser inputs and a
reduction in soil erosion.
Breaking the cane monoculture with legume fallow cropping is one of three
fundamental principles of an ‘integrated farming system’ promoted by the
research findings of the Sugar Yield Decline Joint Venture (SYDJV). The other
two philosophies involve the implementation of:
controlled traffic systems (matching row spacing to machinery wheel
centres)
reduced/zero tillage (to conserve organic matter and maintain soil
structure)
Please note: This course manual was produced for both the central coastal
and Burdekin districts. As such, not all sections of this course will be
relevant for both districts due to differences in the production systems (such
as irrigation).
The aim of this course manual and associated reference material is to
provide committed growers with sufficient information to enable them to
grow a good crop of soybeans.
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1.
2.
7. Pre-season checklist
Select ploughout blocks destined for fallowing prior to commencement of
cane harvest. Consider previous usage of residual herbicides like atrazine,
and Velpar K4 which may have very long plant back periods for legume
crops like soybeans.
Consider the possibility of amalgamating smaller blocks into bigger
entities to facilitate efficient harvesting if the decision is made to harvest
soybeans for grain.
Preferably harvest cane on light/sandy soil types early to allow root knot
nematode (RKN) numbers to decline in a controlled bare fallow prior to
the planting of the fallow soybeans. RKN can reduce soybean and cane
yields.
Harvest cane from blocks with a history of vine, perennial grasses and
nutgrass problems early to allow weed control, so reducing the weed seed
bank prior to soybean planting.
The early removal of cane from ploughout blocks will permit laser
levelling operations, soil testing based on soil type and application of
ameliorants such as ash and mill mud prior to the planting of the soybean
crop.
Ensure you have access to the necessary machinery required for soybean
production (bed-formers, planters, fertiliser applicators, sprayers,
harvesters etc).
Determine which soybean variety you require and order seed and
inoculant early. As a guide, assume 60 kg/ha planting rate then determine
the final sowing rate using seed size and germination % information for
the seed you purchase.
Determine likely crop protection products (herbicides, insecticides and
desiccants) needed for the season and order in advance.
Know where you will sell your grain crop. Consider making marketing
arrangements before planting.
Consider which crop you intend to plant after your soybeans.
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8. Soybean activity planning calendar for a summer planted crop
Month Activity
June/July select ploughout blocks for fallowing•
determine suitability of block size for grain production and ease of
harvesting
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consider amalgamation of blocks for improved grain harvesting logistics•
cut cane from light, sandy soil types early to reduce root knot nematode
numbers
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soil test blocks according to soil type after cane harvest•
determine soybean seed variety, quality and availability with supplier•
control weeds (perennial grasses, vines and nutgrass)•
Aug/Sep laser level blocks if required•
ensure tabulation of all input and seedbed preparation costs•
apply ameliorants, fertiliser and mill mud as per soil test•
prepare ground – rip, offset as required•
determine desired row spacing•
bed forming operation (1.8 - 2m) preferably on controlled traffic
configuration
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pre-irrigate if necessary to stimulate germination of weeds•
spray with knockdown herbicide to control weeds, repeat if necessary•
organise planters, contractors and harvesting equipment as required•
Oct/Nov (early
Dec)
pre-irrigate if necessary to stimulate germination of weeds•
spray with knockdown herbicide to control weeds, repeat if necessary•
assess market opportunities and identify potential buyers of the crop•
check status of seed order•
Dec obtain germination certificate for your particular line of seed•
calibrate planter to achieve desired planting density and depth•
adhere to seed inoculation (rhizobium) procedures•
apply pre-emergent herbicide as required•
ensure availability of crop protection products•
Jan/Feb monitor for weeds and assess the requirement for post emergence weed
control
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monitor crops for disease and insects once a week until flowering•
make the ‘green or grain’ decision based on market outlook, water
availability, weather predictions and input costs relative to potential
returns
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March/April monitor twice a week for disease and insects during flowering, pod
formation and seed development
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initiate integrated pest management (IPM) program if required•
check status of harvesting and transport contractors•
irrigate as required•
April/May monitor once a week after pods have filled until harvest maturity•
monitor crop for physiological maturity•
apply final irrigation if required•
desiccate crop if required•
harvest•