When deposited on land the vinasse can promote improvement in fertility, however, often fertilizer application occurs in areas considered homogeneous, without taking into account the variability of the soil. The objective of this study was to evaluate the effect of vinasse application on potassium content in two classes of soils cultivated with sugarcane, and characterize the spatial variabilit...

The kinetics of phosphorus (P) desorption in soils is important from plant nutrition and environmental perspectives. An experiment was conducted on the field plots that received 100 t ha of solid dairy manure 1 (DM), sewage sludge (SS), or urban solid waste compost (UC) and one rate of chemical fertilizer (CF) for 1, 3 or 5 consecutive years to investigate the residual and cumulative effects of...

In the conditions of a long stationary experiment conducted in Saratov region on Southern Chernozem, it was found that for eight rotations six-field grain-pair crop rotation (48 years) variant without fertilization, carbon losses from 0-40 cm layer were highest. Fertilizers N32P16K7 and N38P13K8 per 1 ha area reduced its by 29-32%. When applying N54P17K7, an increase migration organic into unde...

Microbial biomass nitrogen and carbon were studied in long-term field experiments with continuous cultivation of silage maize and with crop rotation. a positive effect of organic fertilizers on the microbial biomass nitrogen and the carbon content in soil was observed. Statistically significant effect of organic fertilizers on the higher content of microbial biomass C and n was established in t...

Phosphorus (P) is one of the primary nutrients generating eutrophication in aquatic systems1. To prevent eutrophication, municipal or agricultural wastewaters are treated to reduce the phosphorus concentrations in the wastewater reaching surface water streams. While unregulated P is a pollutant in a water body, phosphorous is a useful resource in agricultural fertilizers, food supply, and indus...

There seems to be conflicting information about foliar fertilizers and their timing of application to cotton. Much of the confusion lies in the variety of fertilizer products available. A cotton fanner now has a choice of applying foliar fertilizers (according to fertilizer labels) beginning at the first true leaf stage and continuing until defoliation. This newsletter will focus on available i...

Calcium is the third most crucial nutrient for andean blackberry; however, its absorption limited in acid soils, and low mobility plant decreases effects on fruits. Therefore, effect of foliar fertilizers with calcium blackberry fruits was estimated. In three locations, experiments were established five sources (Ca chelate, CaB nitrate, Ca oxide, CaBZn gluconate) a control without calcium, appl...

Nitrogen is the most important essential nutrient that plays a major role in achieving maximum crop yield in agriculture. Therefore, nitrogen fertilizers such as ammonium sulfate and urea have been extensively used in modern agriculture. These fertilizers are generally oxidized to nitrate via nitrite by nitrifying microorganisms in the agricultural field (4, 10, 11). The serious environmental p...