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A first application offoliar diagnosis to the study of trace elements in the coffee tree in
Application of comparative foliar diagnosis to the coffee tree in the Daloa and Bingerville dis
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20 plants Aboisso absent absorption Agric Akandje Gagnoa Daloa Akandje station anions arabica batch Bingerville boron calcium Campinas cations chemical chlorosis Coffea arabica Coffea canephora coffee bean coffee crop Coffee Parchment Pulp coffee plant complete solution composition control plot cotyledons curve December deficiency symptoms distinctly dry coffee dry matter effect of manuring envelopes experiment favourable February fertilizer figures foliar diagnosis Franco and Mendes g K2O growth increase iron content iron deficiency Ivory Coast Jaques-Felix laterisation leaf leaf analysis litre magnesium Magnesium deficiency manganese Manganese deficiency method milliequivalents months necroses nitrate nitrogen content NPK plot nutrient solutions nutrition parchment and pulp percentage of dry phosphate phosphorus phosphorus deficiency plantation potash potassium rainfall ratio region Robusta coffee trees roots samples seed-envelopes September shows solution 11 sulphate terminal leaves trace elements Treatment NP uptake variation varied weight yellow zinc zone