The application of rapid chemical tissue tests to the determination of mineral levels in cacao

Evans, H.; Murray, D.B.

A.R. Cacao Res. imp. Coll. trop. Agric, 27-31


Accession: 013860855

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The diagnosis of mineral malnutrition in cacao can now be made by three methods: (1) visual diagnosis from the symptoms on growth in sand and water culture and in the field; (2) by interveinal injections, with certain exceptions notably potassium; and (3) rapid tissue tests, as here described, for nitrate-nitrogen, phosphate, potassium, magnesium, calcium, manganese, aluminium, chloride, sulfate, iron, copper, zinc (provisional), boron and molybdenum.