SSP-Enriched compost's effects were insignificant on sunflower post-harvest soil health for single season

A pot cultivation study was conducted on sunflower cultivar Sunbred to examine the impact of various levels of chemical fertilizers and different enriched organic composts on physical and chemical properties for a single season from April to July 2017 at the pot culture yard of the Department of Soil Science & Agricultural Chemistry, Annamalai University, Annamalainagar. The initial soil bulk density, pore space, water holding capacity, pH and EC were 1.41 Mg m^-3, 43.37%, 33.45%, 7.4 and 0.44 dSm^-1, respectively. The investigation encompassed five levels of factor-A (EC0-Control, EC1-EFYM, EC2-EWHC, EC3-ENLC, EC4-ESDC) and four levels of factor-B (CF0-Control, CF1-75% RDF, CF2-100% RDF, CF3-125% RDF), resulting in 20 treatment combinations, arranged in a factorial completely randomized design (FCRD) with three replications. Sunflower Cv. Sunbred was cultivated as a test crop using enriched composts and various fertilizer levels according to the treatment schedule. The recommended N:P₂O₅:K₂O dosage for sunflower is 60:90:60 kg ha-1, which may be administered using urea, SSP, or MOP. Using enriched composts with various quantities of chemical fertilizers resulted no significant changes on soil physical and chemical properties of soil.