Tithonia Manure improves carrot yield and quality

A study on the effect of decomposed tithonia manure on growth, yield and quality of Carrot (Daucus carota L.) was undertaken in the Horticulture, Research and Teaching field, Egerton University for two seasons. The field experiment was laid out in a Randomized Complete Block design (RCBD), with 3 replications. The treatments consisted of four levels of decomposed tithonia manure (0, 1.5, 3.0 and 4.5 t/ha). Data was subjected to Analysis of Variance (ANOVA) and significant treatment means separated using the Turkey’s Honestly Significant Difference Test at P ≤ 0.05. Application of Tithonia diversifolia manure resulted in increase in total fresh root weight, dry root and shoots biomass and root volume compared to the control. Total yield of carrots subjected to 3.0 t/ha increased by 33% and 18% in season 1 and 2 respectively compared to control. The sweetness of carrot was influenced at the highest level of tithonia. Key words: Nutrient, Carrot yield, quality, brix content, biomass

Fluoridated Water, Effects and Green Removal Techniques

Fluoride is a naturally occurring mineral released by rocks into water, soil and air. It elicits dual effects to organisms. Its beneficial effects are effected through water fluoridation to adjust fluoride content in drinking water to acceptable levels that are deemed to prevent tooth decay. Moreover, fluoride itself may be dangerous at high levels. Excessive fluoride causes dental fluorosis and skeletal fluorosis or even severe form of fluorosis known as “crippling skeletal fluorosis,” characterized by muscle wasting, immobility and neurological problems. Studies on fluoride levels are important so as to protect organisms from the adverse effect of high fluoride exposure. Various conventional and sensor-based technologies have been applied, leading to the detection of fluoride in water systems across the globe, with some regions reporting levels above the World Health Organization (WHO) limits. This necessitates interventions to reduce the levels of fluoride in drinking water. Green technologies are emerging as viable options for fluoride remediation since they are associated with minimal environmental contamination. Knowledge on fluoride in the environment is a key and therefore, this chapter provides an overview of fluorides, their monitoring in the environment, benefits as well as health effects and removal technologies that range from conventional to green technologies