ABSTRACT:

This research was conducted to assess the yield of cassava and the dynamics of nutrient limitations in relation to water availability and nutrient availability to obtain better insight of how crops respond to nutrient availability and application of fertilizer in two different states of Nigeria.. The four treatment combinations used for the two locations were N P K N P K N P K M N P K 1 1 1, 2 2 2, 3 3 3 + , 4 4 4 representing different levels of fertilizers combinations which are; N (0kg/ha), N (80kg/ha), N 1 2 3 (70kg/ha), N (90kg/ha), P level. P (0kg/ha), P (26kg/ha), P (26kg/ha), P (20kg/ha), K Level, K 4 1 2 3 4 1 (0kg/ha), K (160kg/ha), K (160kg/ha), K (75kg/ha) respectively. The yield parameters of cassava 2 3 4 across the two locations was influenced by different fertilizer treatments. In the two locations, the control treatment had the least in all the yield parameters while the treatments with fertilizer inputs had better yield performance. Again, the treatment with 70 kg/ha N, 26 kg/ha P O , 160 kg/ha K O 2 5 2 plus 3 tons/ha of poultry manure had the best performance in terms of cassava yield parameters such as biomass weight, stem bundle weight and fresh root weight. The growth and yield parameters of cassava were much better in Otobi than Dorowa due to difference in soil properties. Following the result of this trial, the best rate for better cassava performance in both locations is 70 kg/ha N + 26 kg/ha P O + 160 kg/ha K O + 3 tons/ha poultry manure. This gave significant impacts on growth 2 5 2 and yield of cassava in both locations and was recommended for adoption.