Prognosis and correction of iron chlorosis in peach trees: Influence on fruit quality

A floral analysis for iron (Fe) content allowed for the prognosis of the incidence of the Fe chlorosis on peach (Prunus persica L. Batsch) trees (c.v. 'Babygold 7' grafted on seedlings) with high reliability. From a total of 35 peach trees analyzed, six of them had floral Fe dry matter concentrations less than 133 ppm and these six trees later developed severe Fe chlorosis in their leaves. The early detection and correction of Fe deficiency permitted us to measure the influence of Fe chlorosis on fruit quality as Fe correction resulted in a doubling of fruit size and avoidance of the delay of fruit ripeness that occurred on the Fe-deficient trees.Peer Reviewe

Prognosis of iron chlorosis in apple trees by floral analysis

In populations of apple trees (Malus pumila Mill) affected by iron (Fe) chlorosis, the floral analyses permit to establish relationships between the Fe concentration in flowers and the chlorophyll content in leaves at 60 and 120 days after full bloom. The relationships between both parameters were highly significant with correlation coefficients of 0.603*** and 0.872 ***, respectively. As from previous research with peach trees, these high correlations permitted us to predict at a very early stage, the appearance of the Fe deficiency and its intensity. In our experimental conditions, the first visual symptoms of the Fe chlorosis appear in apple leaves with floral Fe concentrations below 310 ppm in dry matter.Peer Reviewe

Rendimiento de remolacha, trigo, alfalfa y maíz en relación con la profundidad de suelo para los "suelos pardos de costra caliza"

98 Pags.- Tabls.- Figs. Ejemplar original mecanografiado. Trabajo realizado en la EEAD-CSIC a propuesta del Instituto de Colonización ca. 1973.Siguiedo las recomendaciones del estudio en junio de 1.969, lea enayos se localizaron en la zona de Bardenas - Santa Anastasia - Pinsoro. Durante las épocas de crecimiento de las cosechas respectivas se recorrió la zona a la búsqueda de campos de ensayo adecuados, con buena nascencia e igualdad de densidad de siembra, homogeneidad en el crecimiento, ausencia de rodalas por otras causas (especialmente sales) y de modo que en ellos hubiera diferencias fuertes de profundidad de suelo.N