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Articles

DYNAMIC CONTROL OF PHOTOSYNTHETIC PHOTON FLUX FOR LETTUCE PRODUCTION IN CELSS

Article number

440_2

Pages

7 – 12

Language

Abstract

A new dynamic control of photosynthetic photon flux (PPF) was tested using lettuce canopies growing in the Minitron II plant-growth/canopy gas-exchange system.
Canopy photosynthetic rates (Pn) were measured in real time and fedback for further environment control.
Pn can be manipulated by changing PPF, which is a good environmental parameter for dynamic control of crop production in a Controlled Ecological Life-Support Systems CELSS. Decision making that combines empirical mathematical models with rule sets developed from recent experimental data was tested.
With comparable yield indices and potential for energy savings, dynamic control strategies will contribute greatly to the sustainability of space-deployed CELSS.

Publication

International Symposium on Plant Production in Closed Ecosystems

Authors

C. Chun, C.A. Mitchell

Keywords

bioregenerative life-support system, computer control, Lactuca sativa L., PPF

Full text

https://doi.org/10.17660/ActaHortic.1996.440.2

Online Articles (117)

2. APPLICATION OF C₂ 3A CHAMBERS : GROWTH AND ALLOMETRY

M. André

3. DYNAMIC CONTROL OF PHOTOSYNTHETIC PHOTON FLUX FOR LETTUCE PRODUCTION IN CELSS

C. Chun | C.A. Mitchell

4. PROVIDING CONTROLLED ENVIRONMENTS FOR PLANT GROWTH IN SPACE

R.J. Bula | R.W. Ignatius

5. RECYCLING CROP RESIDUES FOR USE IN RECIRCULATING HYDROPONIC CROP PRODUCTION

C.L. Mackowiak | J.L. Garland | J.C. Sager

6. BIOMASS ACCUMULATION IN HYDROPONICALLY GROWN SWEETPOTATO IN A CONTROLLED ENVIRONMENT: A PRELIMINARY STUDY

7. ELEVATED CARBON DIOXIDE INFLUENCES YIELD AND PHOTOSYNTHETIC RESPONSES OF HYDROPONICALLY-GLOWN SWEETPOTATO

8. EFFECTS OF SONIC WAVE UPON GROWTH OF ALGAE

M. Hoki | K. Sato | A. Noro | M. Nakatani | I. Sugahara

9. RESIDUAL FLOWS MANAGEMENTIN ENCLOSED AGROECOSYSTEMS AS A PROBLEM IN FEEDBACK CONTROL

C.-M. Liao | W.-Z. Lin | T.-S. Wang

10. GROWTH OF PHOTOSYNTHETIC ALGAE EUGLENA IN HIGH CO₂ CONDITIONS AND ITS PHOTOSYNTHETIC CHARACTERISTICS

11. RATES OF ETHYLENE RELEASE, PHOTOSYNTHESIS AND TRANSPIRATION OF RICE MEASURED IN CLOSED-TYPE CHAMBER

T. Saito | A. Tani | M. Kiyota | M. Ohe | H. Sato

12. EFFECT OF VAPOR PRESSURE DEFICIT ON SPINACH GROWTH UNDER HYPOBARIC CONDITIONS

K. Iwabuchi | G. Saito | E. Goto | T. Takakura

13. NUTRIENT MANAGEMENT EFFECTS ON SWEETPOTATO GENOTYPES UNDER CONTROLLED ENVIRONMENT.

P.P. David | C.K. Bonsi | A.A. Trotman | D.Z. Douglas

14. DEVELOPMENT OF CENTRIFUGAL PHYTOTRON TO STUDY THE GRAVITY EFFECT ON VEGETABLE PLANT GROWTH

15. MEASUREMENT OF FE²⁺ ION BY COULOMETRY METHOD AT INCUBATION OF THIOBACILLUS FERROOXIDANS

I. Tsuda | K. Kato | K. Nozaki

16. OPTIMUM AND SUB-OPTIMAL TEMPERATURE EFFECTS ON STOMATA AND PHOTOSYNTHESIS RATE OF DETERMINATE SOYBEANS

A.K. Ghosh | M. Ichii | K. Asanuma | A. Kusutani

17. FURROW BOTTOM SEEDING UNDER ROW COVER TO ACCELERATE VEGETABLE GROWTH IN A COLD SEASON

K. Ozawa | M. Okada

18. LIQUID RADIATION FILTER GREENHOUSES (LRFGS) AND THEIR USE OF LOW QUALITY HOT AND COLD WATER, FOR HEATING AND COOLING

J. Gale | D. Feuermann | R. Kopel | S. Levi

19. POTENTIAL OF GROWTH AND FLOWERING IN SINGLE-STEMMED ROSE (ROSA HYBRIDA L.) PLANTS AS AFFECTED BY TOPOPHYSIS

N. Bredmose | J. Hansen

20. DECREASING THE ENVIRONMENTAL LOAD BY A PHOTOSYNTHETIC BASED SYSTEM FOR GREENHOUSE CLIMATE CONTROL

J.M. Hansen | N. Ehler | P. Karlsen | K. Høgh-Schmidt | E. Rosenqvist

21. DEVELOPMENT OF PLANT GROWTH APPARATUS USING BLUE AND RED LED AS ARTIFICIAL LIGHT SOURCE

22. EFFECTS OF BLUE, RED, AND BLUE/RED LIGHTS OF TWO DIFFERENT PPF LEVELS ON GROWTH AND MORPHOGENESIS OF LETTUCE PLANTS

T. Yanagi | K. Okamoto | S. Takita

23. CHARACTERIZING PHOTOSYNTHESIS AND TRANSPIRATION OF PLANT COMMUNITIES IN CONTROLLED ENVIRONMENTS

O. Monje | B. Bugbee

24. ENVIRONMENTAL MODIFICATION AND SHOOT GROWTH IN A CLOSED ECOSYSTEM TO EVALUATE LONG-TERM RESPONSES OF TREE SEEDLINGS TO STRESS

D.M. Olszyk | D.T. Tingey

25. NUMERICAL SIMULATION OF NEW MULTIPLE LAYER PLANT CANOPY MODEL:APPLICATION TO THE SOIL-PLANT-ATMOSPHERE SYSTEM

K. Nakaya | K. Shoji | T. Okano

26. SIMULATION OF SUPPLEMENTAL LIGHT CONTROL STRATEGIES IN A SINGLE TRUSS TOMATO PRODUCTION SYSTEM

H.C. Chiu | K.C. Ting | G.A. Giacomelli | D.R. Mears

27. COMPUTERISED MANAGEMENT OF GREENHOUSES

28. DESIGN OF A WIND TUNNEL FOR PLUG SEEDLINGS PRODUCTION UNDER ARTIFICIAL LIGHTING

Y.H. Kim | T. Kozai | C. Kubota | Y. Kitaya

29. THE PURSUIT OF OPTIMUM ENVIRONMENTS IN AUSTRALIAN GREENHOUSES

G. Connellan

30. AFFORDABLE GREENHOUSE TECHNOLOGY FOR PLANT PRODUCTION

S.C. Mohapatra | C.W. Suggs | Y. Kitaya

31. AN ANALYSIS OF CROP GROWTH UNDER PLASTIC FILMS WITH DIFFERENT LONG-WAVE RADIATION TRANSMITTANCE

T. Hamasaki | M. Okada

32. EFFECTS OF CARBON DIOXIDES AND/OR RELATIVE HUMIDITY ON THE GROWTH AND THE TRANSPIRATION OF SEVERAL PLANTS

H. Shimizu | Y. Fujinuma | K. Omasa

33. SIMULATION OF LIGHT ENVIRONMENT WITH FLUORESCENT LAMPS AND DESIGN OF A MOVABLE LIGHT MOUNTING FIXTURE IN A GROWING ROOM

W. Fang | R.C. Jao

34. GREENHOUSE SPINACH PRODUCTION IN A NFT SYSTEM

A.J. Both | A.R. Leed | E. Goto | L.D. Albright | R.W. Langhans

35. STUDY OF THE MICROBIAL DYNAMICS IN THE ROOT ENVIRONMENT OF CLOSED, HYDROPONIC CULTIVATION SYSTEMS FOR TOMATO USING PHOSPHOLIPID FATTY ACID PROFILES

36. WATER UPTAKE AND GROWTH OF CUCUMBER PLANTS (CUCUMIS SATIVUS L.) UNDER CONTROL OF DISSOLVED O₂ CONCENTRATION IN HYDROPONICS

S. Yoshida | M. Kitano | H. Eguchi

37. EFFECT OF DISSOLVED OXYGEN CONCENTRATION ON LETTUCE GROWTH IN FLOATING HYDROPONICS

E. Goto | A.J. Both | L.D. Albright | R.W. Langhans | A.R. Leed

38. DYNAMICS OF FRUIT GROWTH AND WATER RELATIONS IN TOMATO PLANTS (LYCOPERSICON ESCULENTUM MILL.) AS AFFECTED BY ROOT WATER CONDITION

M. Kitano | H. Eguchi

39. THE CONTROL OF CHEMICAL COMPONENTS OF THE NUTRIENT SOLUTION IN HYDROPONICS WITH NANOFILTRATION MEMBRANE

T. Ohtani | S. Sase | L. Okushima

40. ENHANCEMENT OF ASPARAGUS SEEDLING GROWTH THROUGH ARBUSCULAR MYCORRHIZAL FUNGUS INOCULATION

Y. Matsubara | T. Harada

41. NUTRIENT SOLUTION COOLING AND ITS EFFECT ON TEMPERATURE OF LEAF LETTUCE IN HYDROPONIC SYSTEM

S.W. Nam | M.K. Kim | J.E. Son

42. THE EFFECTS OF KAOLIN CLAY ON CUTICLE TRANSPIRATION IN TOMATO

A. Nakano | Y. Uehara

43. INVESTIGATION OF THE EFFECTS OF PEROXYACETYL NITRATE (PAN) ON PLANTS

K. Tobe | K. Omasa

44. EXPERIMENTAL ANALYSIS OF INFLUENCE OF AIR TEMPERATURE, VENTILATION AND SHADING ON COOLING LOAD AND CO₂ CONCENTRATION IN ZONE COOLING SYSTEM IN GREENHOUSE

H. Nishina | M. Ohtsuka | K. Umakoshi | Y. Hashimoto

45. CARBON DIOXIDE FIXATION RATE CHARACTERISTICS OF A GRAFTED SEEDLING IN AN ACCLIMATION PROCESS

Y. Nishiura | H. Murase | N. Honami | T. Taira | A. Wadano

46. PREDICTIVE CONTROL OF CONCENTRATION OF NUTRIENT SOLUTION ACCORDING TO INTEGRATED SOLAR RADIATION DURING ONE HOUR IN THE MORNING

M.Y. Roh | Y.B. Lee

47. FORCING CULTURE OF FREESIA AND DUTCH IRIS USING SPOT COOLING SYSTEM

H. Hirai | G. Mori

48. STORAGE OF TOMATO SEEDLING PLANT PLUGS UNDER FAINT IRRADIATION AND LOW TEMPERATURE

H. Nishina | K. Yoshida | N. Masui | Y. Hashimoto

49. VISUALIZATION OF AIRFLOW FIELDS IN AGRICULTURAL STRUCTURES BY COMPUTER GRAPHICS TECHNIQUE

L. Okushima | S. Sase | T. Shina | T. Ohtani

50. AN ANALYSIS OF WIND FORCE COEFFICIENTS FOR STRUCTURAL DESIGN OF GREENHOUSES

S.G. LEE | H.W. LEE

51. COMPUTER SIMULATION OF PPF DISTRIBUTION UNDER BLUE AND RED LED LIGHT SOURCE FOR PLANT GROWTH

S. Takita | K. Okamoto | T. Yanagi

52. THE INFLUENCE OF SPECTRAL COMPOSITION ON GROWTH AND DEVELOPMENT OF CHRYSANTHEMUM PLANTS

V.K. Reddy | N.C. Rajapakse | R.E. Young

53. ROSE FACTORY DESIGN

P.A. van Weel

54. SIMULATION OF THERMAL ENVIRONMENT IN PLANT FACTORY BY USING MATHEMATICAL MANIPULATION SYSTEM

T. Honjo | T. Mitani

55. A COMPUTER CONTROLLED CHAMBER SYSTEM DESIGNED FOR GREENHOUSE MICROCLIMATIC MODELLING AND CONTROL

J.M. Hansen | K. Høgh-Schmidt

56. DESIGN OF AN ACCLIMATION SYSTEM CAPABLE OF CONTROLLING CARBON DIOXIDE CONCENTRATION

Y. Nishiura | H. Murase | N. Honami | T. Taira | A. Wadano

57. USE OF COMPUTATIONAL FLOW DYNAMICS CODE FOR MODELING THE BEHAVIOUR OF AIRBORNE DUST ON THE SURFACE OF SOLAR CELL FOR MAXIMIZING SOLAR ENERGY FOR CONTROLLED ENVIRONMENT

J.T. Mailutha | H. Murase | N. Honami

58. EFFECTS OF DIURNAL CONTROL IN THE MINERAL CONCENTRATION OF NUTRIENT SOLUTION ON TOMATO YIELD AND NUTRIENT ABSORPTION IN HYDROPONICS

T. Higashide | H. Shimaji | M. Takaichi

59. CONTROL OF AMOUNT AND FREQUENCY OF IRRIGATION ACCORDING TO INTEGRATED SOLAR RADIATION IN CUCUMBER SUBSTRATE CULTURE

M.Y. Roh | Y.B. Lee

60. QUANTITATIVE DIFFERENCES IN BIOLOGICALLY ACTIVE COMPONENTS AMONG HYDROPONICALLY CULTURED LETTUCE AND ENDIVE CULTIVARS

K. Amimoto | H. Fukui

61. EXPERIMENTAL MODEL AND NEURAL NETWORK BASED ELECTRICAL CONDUCTIVITY ESTIMATION IN SOILLESS CULTURE SYSTEM

J.E. Son

62. EFFECT OF NO₃, Cl AND SO₄ RATIOS IN THE NUTRIENT SOLUTION ON YIELD AND GROWTH OF SEMI-FORCED STRAWBERRIES GROWN IN CLOSED ROCKWOOL SYSTEM

A. Nukaya | H. Hashimoto | H. Kunimatsu

63. EFFECTS OF AIR CURRENT SPEEDS ON THE MICROCLIMATE OF PLUG STAND UNDER ARTIFICIAL LIGHTING

Y.H. Kim | T. Kozai | C. Kubota | Y. Kitaya

64. CONDITIONS, DEMANDS AND TECHNOLOGY FOR AUTOMATIC HARVESTING OF FRUIT VEGETABLES

Th.H. Gieling | E.J. van Henten | E.A. van Os | O. Sakaue | A.T.M. Hendrix

65. EFFECT OF POTASSIUM AND CALCIUM CONCENTRATION IN THE NUTRIENT SOLUTION ON GROWTH AND NUTRIENT UPTAKE OF ROSE PLANTS.

M. Terada | T. Goto | Y. Kageyama | K. Konishi

66. EFFECT OF BLUE AND RED LIGHT INTENSITY ON PHOTOSYNTHETIC RATE OF STRAWBERRY LEAVES

T. Yanagi | K. Okamoto | S. Takita

67. AN AUTOMATED PLANT MONITORING SYSTEM USING MACHINE VISION

G.A. Giacomelli | P.P. Ling | R.E. Morden

68. VISUAL SENSING ALGORITHM FOR CHRYSANTHEMUM CUTTING STICKING ROBOT SYSTEM

N. Kondo | Y. Ogawa | M. Monta | Y. Shibano

69. WATER STRESS ESTIMATION OF TOMATO CANOPY BASED ON MACHINE VISION

K. Kurata | J. Yan

70. NEURAL NETWORK EVALUATION OF CHARGE SIMULATION RETINA FOR 3-D IMAGE ACQUISITION AND PROCESSING

C. Kanali | H. Murase | Y. Nishiura | H. Takigawa | N. Honami

71. FINITE ELEMENT RETINA FOR PLANT GROWTH MONITORING

H. Murase | Y. Nishiura

72. CHILLING EFFECTS FOR NORMAL GROWTH OF TULIP BULBS ESTIMATED BY MRI

M. Iwaya-Inoue | K. Motooka | N. Ishida | M. Koizumi | H. Kano

73. MONITORING OF THE CHANGE IN FRESH WEIGHT OF PLANTS GROWN IN WATER CULTURE

M. Takaichi | H. Shimaji | T. Higashide

74. DETERMINING THE RATE OF WILTING OF A GRAFTED SEEDLING IN AN ACCLIMATION PROCESS USING A MACHINE VISION SYSTEM

Y. Nishiura | H. Murase | N. Honami | T. Taira | A. Wadano

75. MACHINE VISION SYSTEM FOR MEASUREMENT OF THE RATE OF JOINING OF GRAFTED SEEDLINGS

76. DIFFERENTIATION OF SPINACH PLANT (SPINACIA OLERACEA L.) DEVELOPMENT USING LASER INDUCED FLUORESCENCE (LIF)

J. Norikane | T. Takakura | H. Tsuchiya | A. Yamazaki

77. QUANTIFICATION OF LIGHTING SPECTRAL QUALITY EFFECT ON LETTUCE DEVELOPMENT USING MACHINE VISION

S. Sase | P.P. Ling

78. MEASUREMENT OF LEAF TEMPERATURE ON PLANTS AT STEADY-STATE

H. Hedlund | O. Hellgren

79. GENERALIZED SYSTEM FOR PLANT GROWTH ANALYSIS USING INFRARED LED

H. Shimizu | M. Yamazaki

80. DYNAMIC STATE OF WATER CHARACTERIZED BY ¹H-NMR RELAXATION TIMES (T₁) AND SPECTRA FOR PRE-CHILLED TULIP PLANTS IN GROWTH AND DEVELOPMENTAL STAGE

G. Watanabe | M. Iwaya-Inoue | A.H. Molla | K. Matsui

81. APPLICATION OF SYSTEM IDENTIFICATION TO DIAGNOSIS OF RECOVERY OF ROOT FROM TRANSPLANTING INJURY

T. Torii | T. Okamoto | T. Mukai

82. DEVELOPMENT OF PHOTOSYNTHESIS AND RESPIRATION MEASUREMENT SYSTEM USING MASS SPECTROMETRY

E. Goto | T. Takakura | N. Okamura | I. Nishi | J. Futami

83. TEXTURAL FEATURES-BASED NEURAL NETWORK MODEL VS. SOIL COVERAGE MODEL FOR BETTER ADAPTABILITY IN NON-DESTRUCTIVE GROWTH MEASUREMENT OF PLUG SEEDLINGS COMMUNITY

T. Suzuki | H. Murase | Y. Nishiura | H. Takigawa | N. Honami

84. DEVELOPMENT OF A GRIPPER FOR A PLUG-IN GRAFTING ROBOT SYSTEM

Y. Nishiura | H. Murase | N. Honami | T. Taira | A. Wadano

85. NEURAL NETWORK INVERSE ANALYSIS FOR PLANT THERMAL BEHAVIOR

. | H. Murase | N. Honami

86. DISCRIMINATING AND CONTINUOUS MEASUREMENT OF PHOTOSYNTHESIS AND RESPIRATION BY MONITORING ¹³CO₂ AND ¹²CO₂ AS TRACERS

87. SERIAL HARVEST – A SYSTEM TO ENHANCE CARROT (DAUCUS CAROTA) SOMATIC EMBRYO CULTURE PRODUCTIVITY

H. Liyanage | K. Kurata

88. SEVERAL FACTORS AFFECTING BULBLET REGENERATION FROM THE CULTURE OF SCALE SEGMENT AND NODE-BUD IN FRITILLARY AS MEDICINAL BULBOUS PLANT

K.Y. Paek | N.S. Sung | C.H. Park

89. EFFECTS OF COLD PRETREATMENT, CARBOHYDRATE SOURCE AND GELLING AGENTS ON SOMATIC EMBRYOGENESIS FROM ANTHERS OF VITIS VINIFERA L. CVS. ‘REGINA’ AND ‘REICHENSTEINER’

Z.M. Bensaad | M.J. Hennerty | T.D. Roche

90. GROWTH OF GERBERA HYBRIDA IN VITRO AS AFFECTED BY CO₂ CONCENTRATION AND AIR EXCHANGE RATE OF THE VESSEL

B.R. Jeong | C.S. Yang | J.C. Park

91. COMMERCIAL-SCALE PHOTO-AUTOTROPHIC MICROPROPAGATION: APPLICATIONS IN IRISH AGRICULTURE, HORTICULTURE AND FORESTRY

T.D. Roche | R.D. Long | A.J. Sayegh | M.J. Hennerty

92. SIMPLE APPARATUS TO PERFORM PLANT TISSUE CULTURE BY TEMPORARY IMMERSION

93. A NEW METHOD ON MASS-PRODUCTION OF MICROPROPAGATED CHRYSANTHEMUM PLANTS USING MICROPONIC SYSTEM IN PLANT FACTORY

E.J. Hahn | Y.B. Lee | C.H. Ahn

94. MASS PROPAGATION OF POTATO MICROTUBERS IN JAR FERMENTORS

M. Hulscher | H.T. Krijgsheld | E. Jongedijk

95. STEM ELONGATION AND GROWTH OF MENTHA ROTUNDIFOLIA IN VITRO AS INFLUENCED BY PHOTOPERIOD, PHOTOSYNTHETIC PHOTON FLUX, AND DIFFERENCE BETWEEN DAY AND NIGHT TEMPERATURES

B.R. Jeong | T. Kozai | K. Watanabe

96. QUALITATIVE ANALYSIS OF LIQUID MOVEMENT WITHIN SHAKE CULTURE FLASKS USING A FLOW VISUALIZATION TECHNIQUE

K. Kurata | H. Mita

97. RELATIONSHIP BETWEEN SHAPE OF CARROT SOMATIC EMBRYOS AND THEIR GROWTH AND DEVELOPMENT

Y. Ibaraki | T. Shimazu | K. Kurata

98. DEVELOPMENT OF A SYSTEM FOR MASS PROPAGATION OF COLOCASIA ESCULENTA IN LARGE SCALE WITHOUT FORCED AERATION

M. Akita | Y. Ohta

99. EFFECTS OF CO₂ CONCENTRATION, PPFD AND SUCROSE CONCENTRATION ON CYMBIDIUM PLANTLET GROWTH IN VITRO

J.W. Heo | C. Kubota | T. Kozai

100. OPTIMIZATION OF PHOTOAUTOTROPHIC MICROPROPAGATION CONDITIONS FOR SWEETPOTATO (IPOMOEA BATATAS (L.) LAM.) PLANTLETS

T. Kozai | Y. Kitaya | C. Kubota | R. Kobayashi | S. Watanabe

101. EFFECT OF IN VITRO STORAGE CONDITIONS ON THE CONSUMPTION OF THE NUTRITIONAL CONTENTS AND THE VIABILITY OF LILIUM BULB-SCALE

T. Yoshihara | F. Goto

102. IN VITRO PROPAGATION OF HOSTA USING CULTURED SHOOT TIPS AND SOMACLONAL VARIABILITY OF REGENERANTS

K.Y. Paek | S.H. Ma

103. RAPID REGENERATION THROUGH OVARY CULTURE IN ALLIUM VICTORIALIS L. SSP. PLATYPHYLLUM HULT.

104. GASEOUS AND MEDIA-RELATED FACTORS INFLUENCING IN VITRO MORPHOGENESIS OF JERUSALEM ARTICHOKE (HELIANTHUS TUBEROSUS) ‘NAHODKA’ NODE CULTURES

T.D. Roche | A.C. Cassells

105. NEGATIVE PRESSURE IN THE APOPLAST OF ELONGATING TISSUE INDUCES WATER UPTAKE FOR CELL ELONGATION IN TISSUE-CULTURED PLANTS

H. Nonami | Y. Hashimoto

106. EFFECT OF CO₂ ENRICHMENT AND SUGAR-FREE MEDIUM ON SURVIVAL AND GROWTH OF TURFGRASS REGENERANTS GROWN IN VITRO

Y. Seko | T. Kozai

107. EFFECTS OF MAGNETIC FLUX DENSITY AND DIRECTION OF THE MAGNETIC FIELD ON GROWTH AND CO₂ EXCHANGE RATE OF POTATO PLANTLETS IN VITRO

M. Iimoto | K. Watanabe | K. Fujiwara

108. PHOTOAUTOTROPHIC GROWTH OF DIANTHUS CARYOPHYLLUS IN VITRO AS AFFECTED BY PHOTOSYNTHETIC PHOTON FLUX AND CO₂ CONCENTRATION

B.R. Jeong | C.S. Yang | E.J. Lee

109. RAPID ACCLIMATIZATION OF IN-VITRO EUCALYPTUS PLANTLETS BY CONTROLLING RELATIVE HUMIDITY EX VITRO

C. Kirdmanee | T. Kozai | J. Adelberg

110. SIMULATION OF THE EFFECTS OF PHOTOPERIOD AND LIGHT INTENSITY ON THE GROWTH OF POTATO PLANTLETS CULTURED PHOTOAUTOTROPHICALLY IN VITRO

G. Niu | T. Kozai | H. Mikami

111. THE EFFECTS OF ROOT MEDIA AND CO₂ ON ACCLIMATIZATION AND GROWTH OF MICROCUTTINGS OF ANTHURIUM, DIEFFENBACHIA, HOMALOMENA AND SPATHIPHYLLUM

B. Matysiak | J. Nowak

112. AN ASSESSMENT OF THE CONDITIONS FOR THE RAPID PROPAGATION OF IMPATIENS FLANAGANAE IN-VIVO AND IN-VITRO

R.V. Nikolova | N. Lall | A.J.N. Bosa

113. CONTRIBUTION OF RICE IN A TETRALEMMA

N. Ito

114. K PROJECT :PRODUCTION OF FOOD BY BIOLOGICAL FIXATION OF CO₂

J. Kondo | I. Aiga | Y. Nakano | K. Miyatake

115. THE PH-BUFFER ACTION OF WATER TREATED WITH SILICATE MINERALS

H. Nakamura | K. Ishikawa | Y. Okada | Y. Gejima

116. EXTENSION OF VASE LIFE OF CUT CARNATIONS BY STRUCTURED WATER

S. Oshita | Y. Seo | Y. Kawagoe | K. Koreeda | K. Nakamura

117. PROPERTIES OF WATER TREATED WITH GRANULAR CERAMICS AND ITS EFFECT ON PLANT GROWTH

K. Ishikawa | R. Tamura | J. Miyawaki | K. Tanabe