Deficiencies of iron and manganese walk together in the coffee

The lack of micro-nutrients in coffee are most commonly related to lack of zinc, boron and copper from. However, in some cases, the lack of iron and manganese can damage the growth and productivity, although the effect is more familiar setting of their toxicity and nutrients, associated with acidity.
The deficiencies of manganese and iron commonly occur together, often showing more symptoms of one, however, when considering the levels of leaves are also low.
The work of research show that for every bag of coffee produced, the need, between the vegetation and the production is about 110 g of Fe and 10 g of Mn. Quantities greater than the other micro Zn (10 g), the Cu (8.8 g) and B (6.5 g).
The prevailing conditions for the onset of disability are the soil
excessively corrected by liming, with high pH, the lack of drainage, especially in periods of much rain, or the presence of density layers, and by lack effective in very sandy soils and whitish. In plants with roots severely attacked by nematodes or other pests / diseases root may also appear deficiencies, especially iron.
In iron deficiency symptoms are the presence of new leaves yellowish, initially of normal size, reaching almost to the color white and the veins keep the green normal.
As for manganese, the 2-3 pairs of terminals are presented yellowish leaves, the leaf is more smooth, ribbed less pronounced, with the presence of irregular green spots. Although the foliar levels are considered adequate in the range of 50-199 ppm, leaf symptoms are associated with levels below 10-20 ppm.
For faster means of correction of deficiencies in a less time is spraying salt and the correction can be done by subsoiling, drainage, use of acidifying fertilizers, etc, trying to correct the causes.
A new information that was recently observed that the lack of iron can be very critical and even then, the short term, the plant bear still good fruit, as can be seen on the picture presented here.

Coffee with symptoms of deficiency of Fe and Mn by cause of low soil depth, being aggravated by layer limestone in Bocaiúva-MG, which can be seen the coffee even with load, and improvement in that it raises the ground and is more profound.

Branch with typical symptoms of deficiency of Mn, right next to the normal on the left.

J. B. Matiello and A.W.R. Garcia, Agronomist MAP / PROCAFÉ