Comparing some Peanut Genotypes and Determining Phosphorus Fertilizer Dose for Spring Peanut in Tan Yen District, Bac Giang Province

Abstract

Two experiments were conducted at Tan Yen district, Bac Giang province to evaluate five peanut genotypes and to determine the rate of phosphorus fertilizer in 2008 spring cropping season. The peanut cultivar L20 showed significantly highest yield among the genotypes tested. The yield increased proportional with increased levels of phosphorus fertilizer. Among the P₂O₅  levels applied,   (0, 30,  60,  90 and 120 kg per ha) it was found that a rate of 90 kg P₂O₅ per ha and 120 kg P₂O₅ per ha gave the highest peanut yield. However, the highest effeciency of phosphorus was obtained with the rate  60  kg P₂O₅ per ha