Changes in Soil Properties: Conclusions

This study indicates that soil pH, organic C and total N tended to decrease with time in the oil palm agro-ecosystem. However, the decline in soil pH was slight whereas those related to organic C and total N corresponded to the period where the oil palm biomass was burnt or partially burnt at replanting. The large increases in soil organic C with the current norm of zero burnt replanting technique were favourable in regards to sustainability and land degradation.

There were large positive changes in soil P and exchangeable K, which might be attributed to the applications of higher rates of phosphate rocks and K fertilizer especially from the 1990s following the results of fertilizer response trials. However, excessive build-up of soil nutrients on the highly weathered tropical soils of Ultisols should be avoided due to their generally low nutrient holding capacity, which may increase the risk of pollution. On the other hand, nutrient depletion should also be prevented as they commonly lead to lower production in the long-term. Thus, close monitoring of the changes in soil nutrients in the oil palm estates is essential.

This study shows explicitly that the soil fertility status of the Ultisols under oil palm in Johor was enhanced through sound fertilizer management practices and zero burnt replanting technique.

News

AAR wishes to congratulate Ms. Gan Siau Ting and their team members for being awarded the 2013 PIPOC’s Best Poster Award, for their poster paper “A High Density DArT- and SNP-based Linkage Map of ...
AAR wishes to congratulate Mr. Sim Choon Cheak for being awarded the 2012 Scholar Award, Southeast Asia region by IPNI. For further details, please visit IPNI website at http://www.ipni.net/article/I...
\r\n\r\n\r\n\r\nThe GLC Open Day, a showcase of government-linked companies in collaborations with private sectors was held from 24-26 June 2011 at Kuala Lumpur Convention Centre. Boustead Holdings Bhd. is on...
The original article in PDF format\r\n\r\nAs food prices escalate throughout the world, scientists say it is time for Malaysia to pay more attention to soil and crop research.\r\n\r\n\"The crisis of high foo...
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nDr. Kee Khan Kiang, Director of Research, AAR holding the certificate of achievement during the 5th Malaysia Power Brand 2011 Award Gala Dinner held on 27 March 2011.\r\n\r\n\r\nCongr...
\r\n\r\n\r\n\r\nNote: This article is written by Dr. Chee in mandarin and published by Agroworld, Issue No. 236, February 2011, Kuala Lumpur : 34-36. (Translated by Soon, S.H. and reviewed by Wong, C.K.)\r\n...
RM4.4b allocation for oil palm replanting (published in Business Times dated 5 January 2011)\r\n\r\nThe original article in PDF format\r\nMalaysia\'s oil palm industry will spend RM4.4 billion to replan...
From \'Dolly Parton\' bunches to smaller one, oil-laden ones (published in Business Times, 23 November 2010)\r\n\r\nClick here to enlarge image\r\n...
Congratulations to AAR on being awarded the ISO 9001:2008 Quality Management System certification for its Tissue Culture Laboratory (published in New Straits Times dated 20 November 2010)\r\n...
(The mandarin version of this article is published in Alam Pertanian, issue 8, 2010. This article is translated from mandarin to English by SSH)\r\n(The Bahasa Malaysia version of this article is a...
\"油棕品种 - 矮种,高产量,高油量特点 - 打造丰硕收成油棕园\" (published in Alam Pertanian, issue 7, 2010)\r\n\r\n\r\n...
\"Baka Kelapa Sawit Terkini Untuk Meraih Hasil Yang Tinggi\" (published in Info Pertanian, issue 7, 2010)\r\n >>Mandarin version<<\r\n\r\n\r\n...
\r\n\r\n\r\n\r\n\r\n\r\nScope of certification: Production and sales of tissue cultured clonal oil palm planting materials starting from the receiving of embryoids\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nAcknowledgeme...
Aerial Impression of AAR\'s New Complex\r\n\r\n\r\n[ngg_images source=\"albums\" container_ids=\"2\" display_type=\"photocrati-nextgen_basic_extended_album\" gallery_display_type=\"photocrati-nextgen_basic_thumbnai...
We regret to announce the sudden demise of a dear friend and colleague Madam Ho Yuk Wah recently. The International Oil Palm fraternity has lost a valuable member who had contributed so much to the in...
AAR moving into new office complex (published in The Star dated 18 January 2008)\r\n...
Strong demand boosts CPO price (published in Financial Daily dated 18 January 2008)\r\n...
Cheap oil palm replanting loans for smallholders (published in New Straits Times dated 18 January 2008)\r\n...
\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nOrder form\r\n\r\n\r\n\r\nPreface\r\n\"There has never been a cover crop like this before in our plantations\" was the common comment that we heard at the Seminar and Field Tour on \" Mucuna bract...
The Deputy Chief Minister Datuk Patinggi Tan Sri Alfred Jabu Numpang refuted allegations made by some Western non-governmental organisations (NGOs) that peat soil in Sarawak was unsuitable for plantin...
Centre for crop research (published in The Star dated 25 February 2007)\r\n...
Queen\'s Royal Visit to Goodenough College\r\n\r\nMr. Patrick Ng (second from left) was presented to the Queen of United Kingdom on 10 November 2006.\r\n\"Queen Elizabeth II, the Queen of United Kingdom would...
AA Resources optimistic of 20pc sales growth (published in New Straits Times dated 19/07/2006)\r\n\r\n\r\n\r\nEditor\'s notes\r\nErrata\r\n1) Dr. Soh Aik Chin is Head of Agricultural Resources and not chief exe...
Cloned oil palms push up AAR revenue (published in The Star dated 19/07/2006)\r\n\r\nEditor\'s notes\r\nErrata\r\n1) Dr. Soh Aik Chin is Head of Agricultural Resources and not chief executive officer....
\r\n\r\n\r\n\r\nWe are proud to announce that Dr Soh Aik Chin, the Head of Advanced Agriecological Research Sdn. Bhd., has been awarded the Fellow of Academy Science for year 2006 under the biological scien...
Clones from Ijok (published in Malaysian Business dated 16-30 June 2006)\r\n\r\n\r\n...
AAR is proud to announce that Mr. Patrick Ng (Research Officer), who joined us in 1998 has been awarded the prestigious \'British Chevening Scholarships\' for year 2006 from the British Council of Malay...
\r\n\r\n\r\nAAR wish to congratulate Madam Siti Norasikin Binti Moksen (Research Clerk) on her successful completion of the Executive Diploma in Management with Distinction from University of Malaya. It is ...
\r\nWe are proud to announce that Dr Soh Aik Chin, the Head of Advanced Agriecological Research Sdn. Bhd., was presented the prestigious Malaysian Toray Science Foundation 2005 Science & Technology ...