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SYSTEMS AND METHODS
PRACTICAL CROP PHYSIOLOGY
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acid aeration aggregate Ammonium sulphate amount apparatus areas asphalt beds Calcium nitrate Calcium sulphate carbon centimetres chemical chloride climatic colour commercial concentration containers crops cultivation distilled water drainage elements employed essential factors fertilizer flowers formulae germination gravel greenhouse growers growing medium grown growth holes humidity hydroponic hydroponic units hydroponica installations ions iron irrigation kilos layflat lettuces light liquid litres Magnesium sulphate manganese materials method metre wide millimetres mixture Monopotassium phosphate nitrogen normal nutrient solution nutrition operation ornamental plants phosphate phosphorus pipe placed plants plastic Potassium nitrate Potassium sulphate produce propagation pump quantities reservoir roots salts sand culture seed seedlings sodium Sodium nitrate soil soilless culture spray square metres sub-irrigation suitable sulphur sump Superphosphate supply surface tank technique temperature tion tomatoes toxic trays troughs tube types utilised vegetables vermiculite water culture