Graduates oppotunities

Crop Science & Biostimulant Field Officer

Job details

• Job location: Zanzibar
• Job category: Agriculture
• Job type: Full Time
• Job posted: September 2, 2026
• Job deadline: September 12, 2026

About this role

The positions are intended to support C-Weed Mwani’s expanding activities in seaweed cultivation, marine resource management, laboratory quality control, R&D, agricultural biostimulants and product development.

Purpose of the position

To support C-Weed Mwani’s development and validation of seaweed-based agricultural biostimulants through scientifically designed plant, soil and field trials.

The person will be responsible for planning, implementing, monitoring and evaluating bioassays and bioefficacy trials to determine how biostimulant products affect plant growth, root development, shoot development, crop productivity and plant resilience under different conditions.

This is intended to be a practical plant science + field research + data analysis role.

Key responsibilities

• Design and implement laboratory, greenhouse, nursery and field bioassays for biostimulant products.
• Develop appropriate experimental designs, controls, treatment groups and application
• Evaluate the effects of biostimulants on plant growth and
• Monitor and quantify root growth and root
• Monitor shoot growth, plant height, biomass and other relevant growth
• Evaluate effects on crop yield and yield-related
• Assess plant responses to environmental or other controlled stresses where
• Conduct comparative trials against untreated controls and, where appropriate, existing commercial/reference products.
• Establish appropriate trial protocols and ensure consistency between
• Collect accurate experimental and field data at defined
• Maintain trial records, photographs, measurements and other supporting
• Analyse and interpret bioefficacy data and identify meaningful treatment
• Prepare technical reports and communicate trial findings to the R&D
• Identify suitable crops, application rates, application methods and growth conditions for biostimulant evaluation.
• Support development and optimization of seaweed-based biostimulant
• Work with the laboratory team to correlate plant responses with physicochemical characteristics of the biostimulant.
• Support field demonstrations and farmer trials where
• Assist in generating scientific evidence to support product claims and future registration/commercialization.

Minimum qualifications

• Diploma or Bachelor’s Degree in Crop Science, Agronomy, Plant Science, Horticulture, Soil Science, Agricultural Sciences or a closely related discipline.

Required technical competencies

The candidate should demonstrate practical understanding of:

• Plant physiology and crop
• Soil–plant
• Plant
• Crop
• Experimental
• Plant growth bioassays/bioefficacy
• Data collection and
• Basic statistical analysis of agricultural trial
• Field trial
• Measurement of plant growth and yield

Strongly desirable knowledge

• Agricultural
• Seaweed-based biostimulants or seaweed
• Plant growth-promoting
• Root and shoot growth
• Abiotic stress tolerance/resilience
• Soil health and soil
• Greenhouse/nursery
• Field trial design and
• Statistical analysis and scientific

Added advantages

• Experience conducting commercial agricultural product efficacy
• Experience with seaweed extracts/biostimulants.
• Knowledge of plant growth
• Experience with soil and plant tissue
• Experience with GIS/GPS or agricultural field
• Experience working directly with
• Experience in agricultural R&D or product

General expectation for all three positions

Although each position has a different technical specialization, candidates should demonstrate the following general characteristics:

• Practical and field-oriented
• Ability to work independently and as part of a multidisciplinary
• Good technical documentation and reporting
• Ability to collect accurate and reliable
• Willingness to learn and work across C-Weed Mwani’s evolving R&D and production
• Good communication and interpersonal
• Professional integrity and attention to
• Willingness to work in environments that may require travel, field deployment or relocation depending on the position.