Rates of formulated organic liquid plant supplements for carrot (daucus carota) grown in farm under conversion to organic production

Abstract

The study was conducted to develop nutrient management strategies for carrot in farms under conversion to organic production. Specifically, the study determined: 1) the effects of formulated organic liquid plant supplements on the growth and yield of carrot in farm under conversion to organic production, 2) the best rate of the formulated organic liquid plant supplements for the production of carrot in farm under conversion to organic production, and 3) the effects of the formulated organic liquid plant supplements on some physical and chemical properties of the soil in farm under conversion to organic production. The effect of the different rates of formulated organic liquid plant supplements on carrot grown in a farm under conversion to organic production differed significantly in terms of the marketable and total yield of carrots. Application of formulated organic liquid plant supplements at the rate of 70:20:10, 20:70:10, and 10:20:70 during seedling, vegetative, and root bulking stage, respectively, produced the highest marketable and total yield. Application of formulated organic liquid plant supplements significantly affected the organic matter and total nitrogen content of the soil in farm under conversion to organic production wherein the rate 80:10:10 (SS)/ 10:80:10 (VS)/ 10:10:80 (RB) resulted to the highest organic matter content of the soil after harvest. The application of formulated organic liquid plant supplements at different rates did not differ significantly in terms of plant height, insect pest infestation, and powdery mildew infection, soil bulk density, soil pH, available phosphorus content, and potassium content.