Efficiency of sokoto rock phosphate as a fertilizer source for maize production in Southwestern Nigeria

Autor:	E. A. Aduayi, R. A. Sobulo, Akinyemi Olayinka, M. O. Akande
Rok vydání:	1998
Předmět:	Physiology Phosphorus chemistry.chemical_element engineering.material Phosphate chemistry.chemical_compound Soil series Phosphorite chemistry Agronomy Oxisol engineering Poaceae Fertilizer Tonne Agronomy and Crop Science Mathematics
Zdroj:	Journal of Plant Nutrition. 21:1339-1353
ISSN:	1532-4087 0190-4167
DOI:	10.1080/01904169809365487
Popis:	The study on agronomic efficiency of Sokoto Rock Phosphate (SRP) and water Soluble Single Super Phosphate (SSP) as a phosphorus (P) fertilizer sources for maize (Zea mays L. Van TZSRY) was carried out on Iwo Soil Series (Oxic Tropudalf) in the field. The initial (1989) and residual (1990) effects of the two sources of P were assessed. The treatment consist of the control. Two P sources applied at the rates of 25, 50, 100, and 200 kg ha‐1 and their mixtures in equal ratios at the rates of 50 and 100 P ha‐1. The available P was slowly released from SRP in the first year of trial. In the second year however, the SRP supplied significantly higher P than the SSP. The effectiveness of the different rates of SRP in increasing maize grain yields in the initial experiment followed the order of SRP25 > SRP50 > SRP100 > SRP200 while the residual effect after one year on yield was as follows: SRP50 > SRP100 = SRP200 > SRP25. The optimum grain yields of 5.9 and 5.1 tonnes ha‐1 were obtained with SSP at the ra...
Databáze:	OpenAIRE
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