Between these two groups of provenances there is a difference of about 145 cm3 per tree in foliar area , which is equivalent to 179 % ( Table 7 ) . This large difference in foliar area does not appear to be related to the initial growth ...

forming not only the nitrogen it requires for itself by the root nodules but also yielding very considerable ... the N - content of the coffee leaves and make the plants grow better than the control plants ( van der Veen 1940 , p .