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Nigel Warwick
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Agriculture, Biological Sciences & Forestry

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 1 
EFFECT OF TWO SEAWEED PRODUCTS ON RADISH (RAPHANUS SATIVUS) GROWTH UNDER GREENHOUSE CONDITIONS Ramal Yusuf; Paul Kristiansen; Nigel Warwick
AGROLAND: The Agricultural Sciences Journal Vol 2, No 1 (2015)
Publisher : Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.243 KB)

Abstract

Several studies have revealed a wide range of beneficial effects of seaweed products applications on plants growth and development. Seaweeds may cause different effect in plant responses because there are a range possible factors acting in concert. These factors may include to the amount of plant growth regulator (PGR) and nutrients present in the products. PGR activity in two seaweed products (Maxicrop® and Seasol®) was investigated using Radish (Raphanus sativus). Treatments included a control, standard concentrations of the seaweed Products (SS1 and MC1), 2 and 4 times the recommended rates (SS2, SS4, MC2 and MC4) ashed seaweed products (SS-ash and MC-ash), and equivalent amounts of N, P and K to that found in seaweed products (SS-NPK and MC-NPK). The results obtained show that both Maxicrop® and Seasol® can significantly increase crop performance. Maxicrop® increased chlorophyll content and root and shoot growth, while Seasol® only increased the chlorophyll content
EFFECT OF TWO SEAWEED PRODUCTS ON RADISH (RAPHANUS SATIVUS) GROWTH UNDER GREENHOUSE CONDITIONS Ramal Yusuf; Paul Kristiansen; Nigel Warwick
AGROLAND: The Agricultural Sciences Journal Vol 2, No 1 (2015)
Publisher : Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Several studies have revealed a wide range of beneficial effects of seaweed products applications on plants growth and development. Seaweeds may cause different effect in plant responses because there are a range possible factors acting in concert. These factors may include to the amount of plant growth regulator (PGR) and nutrients present in the products. PGR activity in two seaweed products (Maxicrop® and Seasol®) was investigated using Radish (Raphanus sativus). Treatments included a control, standard concentrations of the seaweed Products (SS1 and MC1),    2 and 4 times the recommended rates (SS2, SS4, MC2 and MC4) ashed seaweed products (SS-ash and MC-ash), and equivalent amounts of N, P and K to that found in seaweed products (SS-NPK and MC-NPK). The results obtained show that both Maxicrop® and Seasol® can significantly increase crop performance. Maxicrop® increased chlorophyll content and root and shoot growth, while Seasol® only increased the chlorophyll content.   Key Words: Plant growth regulator, radish, seaweed.
BIOASSAY DEVELOPMENT USING PEA (Pisum sativum L.) Ramal Yusuf; Paul Kristiansen; Nigel Warwick
AGROLAND: The Agricultural Sciences Journal Vol 1, No 1 (2014)
Publisher : Tadulako University

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Abstract

The term bioassay is used to describe the use of living material to test the effect of known and putative biologically active substances. In places where advanced analytical equipment is not available, rapid screening using simple, affordable methods is needed. Seeds of Seeds of peas were germinated (Arditti and Dunn, 1969) and grown in the dark at 20°C for 2 days. Five pre-germinated seeds immersed in 30 mL solution containing test solutions of auxins (IBA), cytokinins (kinetin) and a gibberellin (GA3) all seeds were distributed at randomly to Petri dishes containing the test solution. Auxin activity peak was equivalent to 0.005 µM, while cytokinin activity peaked at 0.5 µM, and gibberellin at 0.5 to 5 µM based on root measurement.   KeyWords : Bioassay, elongation, Pea.
Bioassay Development Using Pea (Pisum sativum L.) Ramal Yusuf; Paul Kristiansen; Nigel Warwick
AGROLAND The Agricultural Sciences Journal (e-Journal) Vol 1 No 1 (2014): June
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/agroland.v1i1.288

Abstract

The term bioassay is used to describe the use of living material to test the effect of known and putative biologically active substances. In places where advanced analytical equipment is not available, rapid screening using simple, affordable methods is needed. Seeds of Seeds of peas were germinated (Arditti and Dunn, 1969) and grown in the dark at 20°C for 2 days. Five pre-germinated seeds immersed in 30 mL solution containing test solutions of auxins (IBA), cytokinins (kinetin) and a gibberellin (GA3) all seeds were distributed at randomly to Petri dishes containing the test solution. Auxin activity peak was equivalent to 0.005 µM, while cytokinin activity peaked at 0.5 µM, and gibberellin at 0.5 to 5 µM based on root measurement.
Effect of Two Seaweed Products on Radish (Raphanus sativus) Growth Under Greenhouse Conditions Ramal Yusuf; Paul Kristiansen; Nigel Warwick
AGROLAND The Agricultural Sciences Journal (e-Journal) Vol 2 No 1 (2015): June
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/agroland.v2i1.333

Abstract

Several studies have revealed a wide range of beneficial effects of seaweed products applications on plants growth and development. Seaweeds may cause different effect in plant responses because there are a range possible factors acting in concert. These factors may include to the amount of plant growth regulator (PGR) and nutrients present in the products. PGR activity in two seaweed products (Maxicrop® and Seasol®) was investigated using Radish (Raphanus sativus). Treatments included a control, standard concentrations of the seaweed Products (SS1 and MC1), 2 and 4 times the recommended rates (SS2, SS4, MC2 and MC4) ashed seaweed products (SS-ash and MC-ash), and equivalent amounts of N, P and K to that found in seaweed products (SS-NPK and MC-NPK). The results obtained show that both Maxicrop® and Seasol® can significantly increase crop performance. Maxicrop® increased chlorophyll content and root and shoot growth, while Seasol® only increased the chlorophyll content.
Co-Authors Paul Kristiansen Ramal Yusuf