The effect of soil mulching and spraying with plant extracts on the vegetative growth, yield and morpho-physio-chemical qualities of tomato
A field experiment was carried out in the Experimental Station of the Department of Horticulture and Landscaping, College of Agriculture, Diyala University in the spring season 2016to study the effect of three types of soil coverings (without coverage, black polyethylene coverage and white polyethylene coverage) and spraying with plant extracts (Imperata cylindrical, Cyperusrotundus, Allium cepa and Sorghum halepense) on the vegetative growth of the tomato plant. The individual and combine effect all these used materials was observed on plant length, stem diameter, number of leaves, leaf area, dry weight of the plant, production kg/ha-1, acidity of fruits and TSS. The experiment was applied according to split-plot in the Randomized Complete Block Design (RCBD) with three replicates. In results, the soil mulching showed a positive effect on all studied vegetative growth properties of tomato crop particularly black color covering. The spraying of the plant extracts separately resulted in a significant and significant reduction in all studied vegetative growth properties. The spray treatment with cyperus extract was characterized by increasing the reduction rate in the measured vegetative growth measurements.