A slow-release fertilizer is important to improve soil conditions and enhances food security through continuous plant supply. With urea as a nitrogen source, kaolin carrier, acrylic acid reaction monomer, potassium persulfate an initiator, N, N '- methylene bisacrylamide crosslinking agent, under the action of cyclohexane sorbitan monostearate, based was synthesized by reverse suspension method...

Controlled-release fertilizers (CRF) use a controlled-release technology to enhance the nutrient use efficiency of crops. Many factors affect the release of nutrients from the waterborne polymer-coated CRF, but the effects of thermal post-treatments remain unclear. In this study, a waterborne polyacrylate-coated CRF was post-treated at different temperatures (30 °C, 60 °C, and 80 °C) and durati...

Belowground fertilization is a prevalent strategy for considerable grain yield and N utilization. However, the optimal depth remains uncertain in paddies, especially slow/controlled release fertilizers. This study aimed to clarify effect of deep “controlled-release blended fertilizer” (CRBF) on rice (Oryza sativa L.) Two N-fertilizer types were selected (a) urea (b) CRBF, both combined at three...

To investigate the interacting effects of polymer coated urea (PCU) and polymer coated potassium chloride (PCPC) on cotton growth, an experiment was conducted with containerized plants in 2014 and 2015. There were two kinds of nitrogen fertilizer, PCU and urea, which were combined with PCPC at three application rates (40, 80 and 120 kg ha-1). The kinds of nitrogen fertilizer formed the main plo...

The invasive African black beetle Heteronychus arator F. is a serious pest of crops in Tropical and sub Tropical regions, including East Africa. Literature on ecology of this pest in Sub Saharan Africa is scarce. Dispersal and abundance of H. arator were determined in maize fields in Njombe Region, in the Southern highlands of Tanzania, from December 2013 to May 2014. Adults of H. arator were c...

Urea coating has been conducted using polylactic acid (PLA) blended with an industrial softwood kraft lignin. The latter was pre-functionalized via esterification or Mannich reaction. The coated urea becomes therefore a highly effective nitrogen fertilizer due to the controlled release after the coating, the slow release from the organically bound nitrogen structure formed after the Mannich rea...