Effects of foliar application of a byproduct of the two-step olive oil mill process on maize yield

Abstract

. Effects of foliar application of a byproduct of the two-step olive oil mill process on maize yield. Agronomie, EDP Sciences, 2003, 23 (7) Abstract -The main objective of this work was to study the effect of foliar fertilization at different doses with a byproduct of the two-step olive oil mill process on the productivity and quality of maize crops (Zea mays, L. cv. Tundra) located in Lora del Río, near Sevilla (Andalusia, Spain). Foliar fertilizer was applied four times during the season and three different concentrations were tested. Foliar fertilization increased leaf soluble carbohydrate contents, chlorophyll A and B and carotenoids, and increased the leaf concentrations of N, K, Fe, Mn and Zn. Yield was significantly increased by 24% to 14.9 t·ha -1 by the highest dosage of the byproduct, which also caused a 22% increase in kernel number and a 19% increase in grain protein content.

Influence of two organic amendments on the soil physical properties, soil losses, sediments and runoff water quality

“…This increase was especially evident for high doses of CC and at the end of the experimental period. These results are in agreement with those of Puget et al (2000) and Tejada and Gonzalez (2004, 2007, who found that a good soil structure was dependent on the content and nature of organic matter which promotes flocculation of clay minerals, the essential condition for the aggregation of soil particles. The decrease in soil structural instability was especially evident in CCamended soils at the end of the experimental period and, according to , this was probably due to the different chemical compositions of the wastes used (e.g., different humic and fulvic acidlike abundance).…”

Mill wastewater and olive pomace compost as amendments for rye-grass

“…Therefore, the addition of OWW and other agricultural and industrial organic materials to soil is becoming a more common agriculture practice, especially in Mediterranean conditions where the mineralisation is higher and the soil needs more organic matter. Finally, foliar applications of OWW from the centrifuge twostep olive oil mill process seem to increase yield, kernel number and grain protein content of maize [30].…”

Effects of different amendments for the reclamation of coastal saline soil on soil nutrient dynamics and electrical conductivity responses

“…Microbial metabolites can dissolve organic components as well as assimilate ions, which alters soil conductivity. Furthermore, the addition of organic amendments results in higher soil permeability (Tejada and Gonzalez, 2003, 2004Wang et al, 2011;Yazdanpanah et al, 2011;Sun et al, 2013), which in turn reduces evaporation and salt content at the soil surface and is conducive to plant germination (Haisheng et al, 2008).…”

“…While many researchers have studied the effects of amendments on the chemical (David and Dimitrios, 2002;Singh, 2004Gill et al, 2009Zhang et al, 2013) and physical (Tejada and Gonzalez, 2004;Gonzalez, 2004Tejada andGonzalez, 2004;Clark, 2007;Jacobs, 2010) properties of saline and sodic soils, little attention has been paid to the changes of electrical conductivity (EC) in different soil layers after the application of amendments. EC can be used as a direct indicator of soil salt content, and an increase of EC has adverse effects on soil structural stability, bulk density, and permeability .…”