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Technology for direct drilling into rice and other heavy stubbles in Pakistan and Australia
Project ID
LWR/2004/035
Project Country
Commissioned Organisation
CSIRO Land and Water, Australia
Project Leader
Dr Chris Smith
chris.j.smith@csiro.au
Phone:
+61-2-6246 5960
Fax:
+61-2-6246 5965
Project Budget
$399,998.00
Start Date
01/10/2005
Finish Date
30/09/2008
Extension Start Date
01/10/2008
Extension Finish Date
28/02/2009
ACIAR Research Program Manager
Dr Mirko Stauffacher
Overview Objectives
Objective 1.
To evaluate and refine the FMI seeder in Pakistan, and the Twynam Happy Seeder in Australia, for direct drilling into rice and other heavy stubbles
Objective 2.
To enable the manufacture of FMI Seeders in Pakistan, and to extend the uptake of the new direct drilling technology by farmers in Pakistan and Australia
Project Background and Objectives
Burning is the normal method of rice stubble management in the 2 Mha of rice-wheat (RW) systems of Pakistan, and in the 0.15 Mha of rice-based cropping systems of southern Australia. In southern Australia most irrigated wheat and 50% of maize stubbles are also burnt. Stubble burning causes air pollution (particulates, greenhouse gases), nutrient loss (especially N and C, also P, K and S) and soil organic matter decline. In Pakistan, air pollution from stubble burning is particularly bad, impacting on human health.
Until recently there has been no machinery capable of direct drilling into rice stubble and achieving consistently good results, due to problems of clogging of tool bars with the loose residues and hair pinning. These problems were recently overcome with the development of the Happy Seeder concept, which involves cutting and picking up the stubble, sowing into bare soil, and mulching with the stubble in a single operation. In 2002 the Happy Seeder was conceived, designed, built and tested by John Blackwell (CSIRO Land and Water) at Punjab Agricultural University, India through ACIAR project SMCN/2000/89. The first Happy Seeder consisted of a seed drill attached to the rear of a forage harvester, which cuts the stubble and deposits it behind the seed drill. In 2003 Shabbir Khan and team (Pakistan Agricultural Research Council) designed and built the FMI seeder which combines the flail chopping, sowing and mulching operations into a single compact machine. In 2004, a 4 m wide version of the Happy Seeder suited to broadacre conditions in Australia was designed and built by John Blackwell, with funding from Twynam Pastoral Co. Pty Ltd.
While the problem of sowing into heavy residues has almost been solved mechanically, our experience to date in India shows that there are some design parameters and agronomic management practices that need to be refined to achieve good establishment and crop performance with the Happy Seeder approach. These include evenness of spreading of the mulch, amount of mulch that a crop can establish through, sowing depth, soil moisture at sowing, soil type and irrigation and nitrogen (N) management. There is clearly a need to evaluate and refine the technology for a range of stubble, soil and seasonal conditions, and to develop guidelines for achieving reliably good establishment, efficient use of N fertilizer and high yields in RW and alternative cropping systems.
Progress Reports (Year 1, 2, 3 etc)
Year 1:
The project activities started on time (October 2005) in Pakistan and Australia, although there was a delay in release of funds in Pakistan. Despite these difficulties, the project has made some good achievements, due to the determination and dedication of key project staff. Major achievements include:
1. construction of Mark III of the FMI seeder, in time for sowing in mid-November 2005; however some modifications were needed, and consequently most of the experimental sites were sown with Mark II. The main improvement in Mark III are reduced weight (~550 kg) and improved operator visibility and straw spreading.
2. installation of 3 unreplicated large plot ( mostly 0.5 acre) trial sites in farmers' fields in Pakistan, comparing establishment methods, and a replicated experiment with establishment method as the main plots, and N rate sub-plots. Establishment methods included sowing into rice residues (~8 t/ha) and partially burnt plots with the FMI seeder. These were compared with conventional practice (partial burning then disc harrowing then broadcast seeding) and sowing into fields with the zero till drill after manual removal of all the rice straw.
Establishment was generally good in all plots/treatments, except in some low lying areas affected by waterlogging. Yields were around 3 t/ha, and there were no significant differences between establishment method, suggesting that there is no disadvantage of sowing into full rice residues with the FMI seeder. This is a good result in the first year.
3. successful establishment of soybeans in 4.5 t/ha of barley residues and barley in 10 t/ha of maize residues in Australia using the Combo Happy Seeder imported from India.
4. several field days and presentations to farmers in both Pakistan and India, piggy-backing on activities largely organised by other groups in both countries e.g. the ADB/IRRI Rice-wheat project in Pakistan, and NSW DPI activities in Australia. Key policy makers and influencers in Pakistan (the Prime Minister, the DGs of PARC, NARC and Punjab OFWM) have already been familiarised with the technology and most have visited some of the field sites.
Year 2:
Progress in Pakistan
Evaluation and refinement of FMI seeder for direct drilling into rice and other heavy stubbles in Pakistan
Two main modifications were made to the Mark-III model of FMI Combo Seeder at Sayyed Machinery Ltd (SML) Lahore on the basis of last year's test results. The new machine was fabricated by SML technicians with the proposed modifications. In a further development, the Combo Seeder has been replaced by the "FMI Rocket Seeder", which was developed for a lighter and more vigorous straw cutting. The new idea is based on the straw chopper kit of New Holland combine harvesters. In the new machine flails were replaced with knife blades on the rotor. This new machine was first tested on the farms of Mr. Ch. Mushtaq and Mr Shahbaz; the preliminary results were encouraging.
A simple straw spreading kit was also developed for all common models of combine harvesters; this has always been seen as a prerequisite for the adoption of the seeding technique. The first prototype kit designed and developed at FMI has generated much interest from many combine rental companies due to its low cost, low power requirement and simple construction.
Field experiments continued in the second year at three selected farm sites near Lahore. Six half-acre demonstration plots comparing establishment methods were established on the farms of Shahbaz Ali (SA) and Chaudhary Mushtaq (CM), as well as on a site adjacent to the controlled, randomised plot trial at the Rice Research Station Kala Shah Kaku (KSK).
At both farmers' field sites (CM, SA) the rice crop was harvested by combine harvesters, while at KSK it was harvested manually. All plots at the three sites were established using the FMI Seeder (Mark III model), while mungbeans were sown with the new Rocket Seeder.
There were significant differences in yield between treatments, with mean yields ranging from 2.1 t/ha (14% grain moisture) with the FMI Combo Seeder after partial burning, to 2.9 t/ha with the FMI seeder sown into full residues at the SA farm. At the CM farm the treatment with the Combo Seeder sowing into standing stubble only yielded 2.19 t/ha, compared to 2.89 t/ha with the same seeder sowing into full residues. Yields in the plots with farmer practice ranged from 2.59 to 2.68 t/ha.
Extension in Pakistan
Extension activities in Pakistan were not possible due to the extremely wet rabi season in 2006/2007.
During the PARC Silver Jubilee celebrations from12-14th December 2006, an open house was organized to showcase PARC achievements during the last twenty five years. Attendees from all over from Pakistan participated, including high level government officials from all provinces, federal government, high level policy makers and progressive farmer. The President of Pakistan attended as the chief guest on last day. A big agri-machinery display was arranged, including the FMI Combo Seeder.
Progress in Australia
Due the loss of all project staff in CSIRO and low water allocations in the Riverina due to prevailing drought, filed activities had to be deferred and no data was generated. Further efforts conducting field trials with the Happy Seeder into rice stubbles were unsuccessful due to heavy rain just before wheat sowing in May 2007.
Project Outcomes
Major benefits of direct drilling with mulching in comparison with direct drilling with stubble burning in Pakistan will include higher yields from reduced turnaround time between rice harvest and wheat sowing and from conservation of soil water, and improved air quality. In both regions there will be immediate benefits of reduced costs (irrigation water, herbicides) and reduced greenhouse gas emissions, and medium to long term benefits of improved soil structure and nutrient status which will translate into reduced fertilizer costs. In Australia application of the technology will also increase the opportunity for double cropping.
Location
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