Effect of adding chemical and organic fertilizers and spraying seaweed extracts on NPKS concentrations and cauliflower yield

A field experiment was carried out in the agricultural season 2021-2022 one of fields Muqdadiya, Al-Harouniya district, located 40 km northeast Baquba district Diyala governorate. The agrarian soil classified as silty clay (Soil Survey Staff, 2006). It is at a longitude 53° 34’ N and latitude 56° 04° 45° S. aimed to study effect adding chemical organic fertilizers spraying seaweed extracts on NPKS concentrations cauliflower yield. investigation included three factors: fertilizer (buffalo waste) levels (0, 5 10)% terrace’s size, symbolized by M1, M2 3M, respectively. added depth 0-30 cm month before planting seedlings field. second factor addition NPK compound (20:20:20) two (0 full recommendation 300 kg H-1 when planted feed) 1 C 2 C, third extract with 4) ml L-1 illustrated A1, A2 according an RCBD randomized complete block design replications. results showed that (10% size terrace) led significant increase head’s weight, reaching 1.611 kg. weight head, it reached plant-1, sulfur concentration fruits 2.00 mg kg-1, nitrogen leaves 4.68%. phosphorous 25%, potassium 2.05%; fertilization also increased head from 1.385 Plant-1 1,108 Plant-1.There each 2.00% 1.53%, 4.60% 3.48% 0.37% 0.26% 2.78% 2.27 %, 4 mmol. which 1.282 Plant-1, 803% 2.58%.As for triple interaction .Keywords: fertilization, extracts, cauliflower.