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Dr. P P Joy

Dr. P. P. Joy
Professor of Agronomy & Head (Retired)
Mobile Phone No: 
Address (Residence): 
Pazhampillil, Kummanode
Pattimattom PO
Ernakulam Kerala 683562
Land Phone No (Residence): 

Prof. P.P. Joy, Ph.D.
Professor of Agronomy, Kerala Agricultural University, Kerala, India

Dr. P. P. Joy is an eminent researcher and Professor of Agronomy & Head, Pineapple Research Station, Kerala Agricultural University, Vazhakulam, Kerala, India. He joined the University in 1984 as Assistant Professor (Agronomy), undertook research and development of Pulses initially, followed by Rice, Medicinal and Aromatic Plants and subsequently Fruit Crops. Presently, he is working as the Professor & Head of Pineapple Research Station, Vazhakulam, Kerala and is involved in developing agro-technologies, processing technologies and IT enabled services for pineapple, passion fruit and other economically important fruit crops of Kerala. He has put in 32 years of service in agricultural research and development, teaching and extension. His areas of expertise include agronomy, soil and water conservation; water, nutrient, weed and cropping system management; research project, database, web and ICT management. He is well conversant with latest research methodology, analyses and interpretation of research results and has ample experience in both field and laboratory experimentation.    
The team lead by him developed a variety “Sugandhini” (ODC-130) in cinnamon, 134P in Passion fruit and agrotechnologies for Rice, Pulses, Medicinal & Aromatic Plants and Fruit crops. He was the Principal Investigator of 25 university research projects and he has associated with another 32 projects of AICRPs and KAU. He was the Principal Investigator of the ICAR Ad-hoc research project “Standardisation of agro-techniques for lesser known medicinal and aromatic plants of Zingiberaceae”, “Development of lemongrass oleoresin for flavouring”, KSCSTE project “Evaluation of passion fruit types for commercial cultivation in Kerala” and KPM project “Organic versus inorganic nutrient management of pineapple varieties”. He has further associated with twelve projects funded by Indian Council of Agricultural Research, Ministry of Agriculture, Ministry of Health and Family Welfare, National Watershed Development Project for Rainfed Areas (NWDPRA), Kerala Horticulture Development Programme (KHDP), Kerala State Council for Science, Technology and Environment (KSCSTE) and Kerala Pineapple Mission (KPM).

He was instrumental in developing websites for the research centers he worked. He has good research, development and management experience and received many awards and honors. He is a member of several national bodies/societies. He has authored over 200 publications including 25 books/chapters, 70 research papers, 25 bulletins, 35 seminars/symposia/conference papers and 40 popular articles. He received his B.Sc. (Agri.) degree from Kerala Agricultural University, M.Sc. (Agri.) in Agronomy from the University of Agricultural Sciences, Bangalore and Ph.D. in Agronomy from Kerala Agricultural University, all with a first rank. 

An ardent believer in God, he thanks the Almighty for all the success in his academic and professional life.


Academic qualifications




Year of Passing


Degree date

B.Sc. (Agri.)

KAU, Thrissur        



First Rank


M.Sc. (Agri.)

UAS, Bangalore



First Rank, Gold medalist


Ph. D. (Agri.)

KAU, Thrissur        



First Rank



Awards received

1. Aspee Gold Medal for the year 1982

2. Dr. N. Kunjan Pillai Memorial Endowment price for 1981-'82

3. Dr. Abraham Thomas Memorial Endowment Gold Medal for 1981-'82

4. ICAR Junior Fellowship with first rank  1983

5. University of Agricultural sciences Gold Medal for 1984

6. Government  of Karnataka, Directorate of Youth  Services  and Sports State Award for 1984


Trainings undergone

Title of the course Institution/Agency offering the course

Start Date

End Date

Regional workshop cum training for KVKs/TTCs in Kerala (ICAR) from 31 Dec 1987 to 3 Jan 1988 at KVK, Mithranikethan, Vellanad, Trivandrum. (Extn(3)94203/87 dt.6.2.88 of DE, Kerala Agricultural University)



Summer Institute on Advances in Agronomy, 3-21 June 1993, College of Agriculture, Indira Gandhi Agricultural University, Raipur-492 012, MP. (A/548/93 dt.29.5.1993 of Assoc. Prof & Head, Aromatic and Medicinal Plants Research Station, Odakkali)



Training on Email and Internet, 12-13 March 1998 at DISC, KAU. (R7/65052/98 dt.4.3.1998 of DR, Kerala Agricultural University)



Short course on Crop Resource Management in Humid Tropics, 3-12 August 1999, Dept. of Agronomy, CoA, Vellayani, Trivandrum-695 522. (A/1095/99 dt.2.8.1999 of Assoc. Prof & Head, Aromatic and Medicinal Plants Research Station, Odakkali)



Short course on Recent advances in organic farming technologies in plantation crops at Central Plantation Crops Research Institute (ICAR), Kasaragod-671124, 18-27 Nov 2003. (A/800/2002 dt.13.11.2003 of Assoc. Prof & Head, Aromatic and Medicinal Plants Research Station, Odakkali)



Summer School on Recent Advances in Agricultural Research Project Management, NAARM, Rajendranagar, Hyderabad-500030, 27 May to 16 June 2004. (R1/67342/04 dt.6.5.2004 of DR, Kerala Agricultural University)



ICAR Summer School on Recent Advances in Agricultural Research Project Management, National Academy of Agricultural Research Management, Rajendranagar, Hyderabad-500030 (R1/67342/04 dt.6.5.2004 of DR, KAU)



Vaidyaratnam Global Summit on Ayurveda & Expo 05, 9-11 Dec.2005, Casino Hotel, Thrissur. Ashtavaidyan Thaikkattu Mooss, Vaidyaratnam Oushadhasala, Thrissur.



UGC-RCC Refresher Course on “Advances in Environmental Sciences and Technology” 4-25 January 2006, School of Environmental Studies, Cochin University of Science and Technology, Cochin University P. O., Cochin. (No.C-5075/06 K Dis dt.21-02-2006 of ADR, PTB)



UGC-RCC Refresher Course on “Advances in Environmental Sciences and Technology” School of Environmental Studies, CUSAT(No.C-5075/06KDis dt.21.02.06) of ADR, PTB)



ICAR Summer school on Advances in Agribusiness and Information technology at National Academy of Agricultural Research Management, Rajendranagar, Hyderabad-500030 (No. R1/67562/06 dt. 4.7.2006 of DR, KAU)



DST Senior Scientists Training programme of 2 weeks duration on Techno Scientific Management at National Institute of Advanced Studies (NIAS), IISC Campus, Bangalore-560 012



ICAR Winter School on GIS based watershed planning in Agriculture  at Department of Soil Science & Agricultural Chemistry, College of Horticulture, KAU, Thrissur



Methods of Information retrieval from digital library and web. University Library, MG University, Kottayam




UGC Refresher Course in Computer Science. Academic Staff College,  University of Kerala, Kariavattom Campus, Thiruvananthapuram



CAS-Training Programme on Advanced Quantitative Techniques in Agricultural Research, IASRI, Library Avenue, PUSA, New Delhi-110012


Positions held

Assistant Professor    : 17.10.1984 - 27.02.2004

Associate Professor   :  28.02.2004 - 31.12.2008

Professor                       : 01.01.2009 - Till date



Stations worked
Station From To
RARS, Pattambi 17.10.1984  10.08.1987
KVK, Pattambi 11.08.1987  30.09.1988
AMPRS, Odakkali 01.10.1988  31.08.1989
RRS, Moncompu 01.09.1989 05.10.1991
AMPRS, Odakkali 06.10.1991 26.12.1999

Ph.D. Study leave, CoH, Vellanikkara

27.12.1999  30.11.2000
AMPRS, Odakkali 01.12.2000  17.06.2002
RARS, Pattambi 18.06.2002  07.06.2003
AMPRS, Odakkali 08.06.2003  28.02.2010

PRS, Vazhakulam (16.10.2009 i/c)

01.03.2010 28.02.2018


Expertise:   Rice, Pulses, Medicinal & Aromatic Plants, Fruit crops

                        Agronomy, soil and water conservation,

                        Water, nutrient, weed and cropping system management

                        Research project, Database, Web and ICT management


Research and Development Contributions

Pulses (1984-87)

Identified promising varieties and developed agronomic practices of pulses in Kerala and included in KAU Package of Practices.

In pulse variety evaluation trials V-16 and DPI-1243 cowpea types were found to be high yielders during both kharif and rabi.

Optimum time of planting of grain cowpea was found to be from 30 June to 15 July.

Consumer preferred red seeded Krishnamony Cowpea was the best for summer rice fallows. IIHR-6-1-B was a superior vegetable cowpea.

Irrigation followed by weed control and fertilizer application significantly increased grain yield of summer cowpea while rhizobium inoculation and plant protection did not have significant effect.

LBG-17 black gram was an excellent yielder and resistant to pulse beetle in rabi.

Relay cropping of kharif rice with rabi black gram was the best for moisture scarce areas.

Rice (1989-91 & 2002-03)

Developed various herbicide technologies for weed control in transplanted and direct sown rice; green manuring and integrated nutrient management practices for Kuttanad and Palakkad and included in KAU Package of Practices.

In PMT, Rice responded to applied fertilizers only during rabi. Only N produced a significant response. Straw incorporation and lime application had no measurable effect on yield. Soil test recommendation over-predicted the need for lime and it appeared less economic.

2,4-D 0.8 kg ai/ha at 20 DAS/T and pyrazo sulfuron ethyl 0.01 kg ai/ha 6 DAS/T effectively controlled broad-leaved weeds and sedges whereas their combinations with butachlor 1.5 kg ai/ha at 6 DAS/T sprayed on a thin film of water controlled a broad spectrum of weed flora both in direct sown and transplanted rice. Oxadiazon was effective in direct sown rice. Pretilachlor 0.75-1.0 kg ai/ha and anilophos 0.4-0.6 kg ai/ha at 6 DAT were very useful in transplanted rice but they caused severe scorching in direct sown rice.

Time of K application significantly improved grain and straw yields during kharif, with K applied at Basal + Tillering yielding the maximum. Levels had no difference.

Applying butachlor 50 EC at 1kg ai/ha 6 DAT was most economical for controlling weeds in transplanted rice. Continuous application of same/similar herbicides may lead to infestations of tolerant weeds particularly perennials which were difficult to control with herbicides. Hence, herbicides should not be considered as substitute for other weed control practices but as supplements. Therefore, integrated weed control practices were essential not only for satisfactory weed control but also for minimizing establishment and spread of perennial weeds. 

Line sowing + 100% NPK recorded higher grain yield which was on par with the treatments involving NPK indicating that  inorganic fertilizer is inevitable for boosting the yield of upland rice Swarnaprabha.

Transplanting with green leaves 5t/ha, Factomfos 100 kg/ha basal and Urea 45 DAT recorded the highest yield of 4262 kg/ha. 50% of the recommended N was sufficient for both very early and early varieties in kharif season.  Under very early type, IET-16933 gave the highest yield of 2790 kg/ha which was on par with 2758 kg/ha produced by local check Annapoorna.  Among the early varieties IET-17037 recorded the highest grain yield of 2647 kg/ha which was on par with 2588 kg/ha produced by the local check Kanchana.

FYM 10 t/ha had significant effect on grain yield.  Maximum grain yield was recorded when fertilizers were applied at 150% (of 70:35:35 kg/ha) both in kharif and rabi seasons for Jyothi.

Inter cropping with green manure was feasible in dry sown rice.  Growing cowpea, green gram and horse gram ensured green matter addition to the soil. SSP, Rajphos and Udaiphos were on par for irrigated rice.

Pyrazosulfuron ethyl 50WP, 0.025 kg ai/ha 8-10 DAT and Butachlor (Machete) 20WP, 0.938, 3 DAT followed by Almix 50EC, 0.004, 21-25 DAT were the choice herbicides for transplanted rice. Butachlor 1.25 kgai/ha+1hand weeding, Pretilachlor 0.7kgai/ha + Butachlor post emergent, Line sowing 20x10cm + Pretilachlor + row weeding controlled weeds efficiently. Butachlor +Propanil, Pyrazosulfuron ethyl and Halosulfuron methyl  though showed slight  crop toxicity  were  effective for weed control in puddled direct sown rice.  Toxicity was low with Almix. Halosulfuron methyl 75WG was effective against sedges and broad leaved weeds.  NC-319 75WG @ 45 g ai/ha and @ 37.5 g ai/ha at 6DAT were on par with two hand weeding at 15 and 30 DAT in transplanted rice.

Herbicide treatments pretilachlor (0.75 kg ai/ha) and anilophos (0.4 kg ai/ha) were more economical than hand weeding based on marginal benefit-cost ratio in transplanted rice.

Medicinal and Aromatic Plants (1988-89, 91-99, 2000-02, 03-10)

Optimum seed rate, viability of seeds, planting density, methods of planting, fertilizers and manuring practices, nutrient uptake and requirement, weed control measures, nursery techniques, harvesting stage and techniques, post-harvest handling requirement etc. of many aromatic and medicinal plants were standardized and included in KAU Package of Practices.

Both mother and finger rhizomes could be utilized for planting in kacholam. Use of seed bits of size 5-7g was found to give maximum yield of rhizome and would economize the seed rate.

Cinnamon (Cinnamomum verum Presl.) type collection of 234 accessions at Aromatic and Medicinal Plants Research Station, Odakkali was evaluated for growth, yield and quality. The yields of eugenol and leaf oil were primarily associated with leaf yield which was positively correlated with canopy spread and plant height.  Large leaf size and intense purple colour of flushes were by and large wild characteristics in cinnamon. Selection for improvement in leaf oil or eugenol yield could be attempted indirectly using leaf yield which was governed mostly by canopy spread.  The accession ODC-130 was identified to be the most promising followed by  ODC-10 and ODC-67. A eugenol-rich leaf oil yielding cinnamon variety Sugandhini (ODC-130) with a leaf oil yield of 300 ml/tree/yr, oil recovery 1.6% on fresh weight basis (3.7% on dry weight basis) and eugenol 94% was developed and released and included in KAU Package of Practices. 

Distillation methods for various essential oil yielding crops were standardized. Methods of long term storage of essential oils were developed.   

A herbal garden comprising of about 450 species of medicinal plants was established. Suitability of cultivation of various medicinal plants in coconut garden was demonstrated.

The ICAR project on Standardization of agrotechniques in lesser known aromatic and medicinal plants of Zingiberaceae could evolve the package of practices for Alpinia calcarata, Curcuma zedoaria and Kaempferia rotunda of Zingiberaceae and included in KAU Package of Practices. Twelve species of Zingiberaceae available in the Western Ghats were collected and established in the herbal garden of the Aromatic and Medicinal Plants Research Station, Odakkali. Growth, yield and quality parameters of selected species were studied. Market survey and quality evaluation of crude drug of selected species were undertaken. The status of research on zingiberaceous plants was reviewed. Future areas of research were also suggested.

Determination of leaf area in lemongrass from leaf length and breadth was standardized for small sample (L x B x 0.6132) and for large samples (Leaf dry weight x 164.9444). Cymbopogon flexuosus was most suited and adapted to Kerala than Jammu C. pendulus – RRL-16 and American C. citratus – OD-439.

Planting lemongrass slips followed by transplanting 25 days old seedlings was better than broadcasting or dibbling. Application of inorganic fertilizers though increased herb yield, did not increase oil yield significantly. Application of lime in palmarosa had no response, might be tolerant to acid soils, pH 5.5-6.5. Among N fertilizers, slow release coated fertilizers had no advantage over urea. Application of 40 kg each of P2O5 and K2O increased oil yield though not significantly. Thathimalangatha grass was a promising source of geraniol and a substitute for palmarosa.

The project on Agrotechnological practices for quality crude drug production in nilappana (Curculigo orchioides Gaertn.) developed Package of Practices for Curculigo orchioides. It was established that nilappana had an active growth phase for 7 months, after which it could be harvested for quality rhizome. Panamkuzhi biotype was comparatively better for cultivation and quality drug formulations. It was a shade loving plant and its growth, yield and quality were best under 25% shade at 10 x 10 cm spacing. Organic manure and fertilizer in 75:25 proportion was ideal for best yield and quality. Poultry manure was the best nutrient source for highest rhizome yield. With this agrotechnology, over  2.5 t ha-1 of fresh (1.0 t dry) good quality rhizome could be produced. Black musli or Nilappana rhizome developed upward. It was slow growing, less competitive and poor yielding. It could not withstand weed competition and rodent attacks. Hence, appropriate control measures were essential for successful cultivation. There existed large variability in the market samples and there was need for proper standardisation of quality in crude drug. Crude drug from High Ranges of Kerala was superior in quality.

In the ICAR project on Development of lemongrass oleoresin for flavouring, the extraction of oleoresin from lemongrass was standardised, including the part of the plant, pre-processing requirements, type of solvent and the time of extraction. The 450 lemongrass accessions were evaluated for oleoresin, the best types identified and its agronomic practices were developed. Dried fine powder of leaf lamina and leaf sheath was found to be best suited for oleoresin extraction. Among the solvents tried methanol gave highest yield of oleoresin (17.9%). Methanol with 75 minutes boiling, 10 minutes rinsing and one time washing was the best method for hot extraction of lemongrass oleoresin. Protocols were developed for the extraction of oleoresin from lemongrass which could be adopted for the pilot scale extraction of lemongrass oleoresin. Cold extraction of oleoresin could be advocated for flavouring beverages like tea.  The lemongrass accession OD-410 can be put to commercial cultivation for the large scale extraction of oleoresin of best quality. Agronomic practices including the optimum time of harvest and fertiliser management practices could be adopted in the commercial cultivation of lemongrass intended for oleoresin extraction. A review of current status of research on lemongrass is also included in the report.

Developed CD on medicinal plants, conducted workshops, agri-clinics, imparted training to farmers, broadcast radio talks,  maintained amprs website (http://www.kau.edu/amprs). Prepared Lemongrass (Cybopogon citratus) datasheet for Crop Protection Compendium of CABI, Nosworthy Way, Wallingford, Oxfordshire, OX10 8DE, UK

Published books and Souvenir of National Workshop on Grower-Industry Linkage for Promotion of Medicinal and Aromatic Plants Cultivation. Conducted Agri-clinics, workshops,  imparted training to farmers, broadcast radio talks,  distributed  publications  and maintained good liaison with farmers, traders and user industries, maintained amprs website (http://www.kau.edu/amprs).

In the NMPB Project, Agrotechnology for cultivation of Bacopa monnieri was developed and GAP monograph prepared.

Fruits (2010-2018)

Pineapple breeding for yield & quality was conducted to develop pineapple varieties suitable for processing and table purpose through hybridization. The traditional pineapple verities of Kerala, ie, Kew and Mauritius were hybridized and F1 hybrids were planted in the field and selections were made based on favorable yield and qualitative characteristics. The suckers of superior types were subsequently planted in the field and the evaluation carried out continuously. Fruit weight with and without crown, crown weight and TSS were being taken and the data were utilized for the selection of superior types (T3).

In the Evaluation of Fungicide Samarth (Hexaconazole 2% SC) against Pineapple Collar Rot & Other Diseases, Hexaconazole 0.5% is more efficient in disease control though it slightly affected plant growth in terms of plant height and leaf length in the early stages with no marked difference thereafter. Hexaconazole 0.4% is safest with good disease control efficiency.

In the Selection of High Yielding Superior Quality Pineapple Variety for Central Zone of Kerala in PTD mode, based on the total fruit yield for three years (2011-13) Mauritius performed the best followed by T3 and MD-2.  The most popular international pineapple variety MD-2 with cylindrical shape, flat eyes, narrow core, more pulp, better shelf life and less core browning was domesticated, evaluated and popularized. MD-2 suckers yield in one year and quality is comparable to Mauritius. However, it produces few suckers and slightly more susceptible to fungal disease in Kerala.

In the KSCSTE Project: Evaluation of Passion Fruit Types for Commercial Cultivation in Kerala, 14 promising passion fruit types out of 150 accessions obtained from different parts of South India were studied for its phenology, growth, yield and quality parameters. Among them, best purple accession 134P, a collection from Seven Mallay Estate, Tata Tea Ltd, Munnar, was selected based on growth, yield and quality parameters including organoleptic evaluation and recommended for commercial cultivation in the mid lands of Kerala. 134P had single fruit weight 104.54 g, juice recovery 33.54%, yield 24.92 fruits/plant/year, totally weighing 2.52 kg/plant/year or 2800 kg/ha/year, producing  937 kg/ha/year of juice as the mean of first two years.

KPM-Organic versus inorganic nutrient management of pineapple varieties. 3 varieties: Mauritius, Amritha, MD2; & 4 nutrient sources: control, organic, inorganic, integrated is ongoing. Cultivation of Vazhakulam Pineapple (Mauritius) with any source of nutrient application (Organic, inorganic or integrated) is statistically on par and any differentiation is not scientifically justifiable.  Considering the marginal benefit: cost ratio, cultivation of Mauritius pineapple with inorganic fertilizers (₹3.82) seems to be most economically viable which is most prevalently followed for pineapple cultivation in Kerala.

WhatsApp Groups for Pineapple and Passion fruit were started in 2017. These whatsApp groups help the members to interact with specialists, solve queries and share their experiences. 

More information at http://prsvkm.kau.in/article/pineapple-research-station-r-d


Outreach activities are effectively carried out through personal discussions, field visits, phones, emails, website, posts, radio, TVs, news papers, periodicals, brochures, publications, pineapple fests, seminars, Agri-clinics, workshops,  Student projects and trainings, etc and and maintaining good liaison with farmers, traders and user industries. Publications such as leaflets, palmlets, books, CDs, DVDs, etc covering various aspects of cultivation and utilization of the mandatory crops of the station are also being undertaken.

As part of extension activities, imparted training to farmers on various aspects of agriculture, conducted demonstrations, prepared audio-visual aids, published scientific books and articles, broadcast radio talks, TV programmes, organized science and youth clubs, conducted study tours and farm days , distributed seeds and publications, surveyed farm families and maintained good liaison with farmers, traders and user industries. Also functioned as the scientist i/c of Farm and Library, conducted Agri-clinics and training programmes, participated in national and international fairs and exhibitions, documented the research, extension and other activities of the research centre and created station websites (http://www.kau.edu/amprs, http://www.kau.edu/prsvkm, http://prsvkm.kau.in).

Motto: ‘Quality People, Infrastructure and Work culture for Quality Technology, Products & Services and Merit alone counts for Quality suitable for the purpose’.

To become the ultimate authority and provider of excellent quality technology, products and services in tropical fruit crops through concerted research and development efforts sustained by best human resource and infrastructure development.

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Pineapple Research Station
Kerala Agricultural University
Ernakulam Kerala 686670