Mineral Fertilizer

RESULT

Effects of Cassava peel compost and Mineral fertilizer on Seed Yield attributes of soybean

The variability in number of pods per plant and percent pod set across all treatments was similar with the least value for both parameters obtained in the control treatment. The mean total pods per plant varied from 34.3 in control to 56.3 in 150 kg NPK ha-1 + 1.25 t ha-1 CPC. The order of increase in the mean number of pods per plants across the various treatments were 150 kg NPK ha-1 + 1.25 t ha-1 CPC > 100 kg NPK ha-1 + 2.5 t ha-1 CPC > 50 kg NPK ha-1 + 3.75 t ha-1 CPC > 200 kg NPK ha-1> 5.0 t ha-1 CPC > control. In case of pod filling, the plants treated with 150 kg NPK ha-1 + 1.25 kg CPC had highest mean number (51.3/ plant) of filled pods.

200 kg NPK ha-1 gave highest grain; husk (1:7) and followed by application of 5.0 t ha-1CPC. The mean value is 1:35 and range value is between 1:7 and 1:2. There was significant difference (p≤ 0.05) between control and 150 kg ha-1 NPK+ 1.25 t ha-1 CPC ha-1 CPC (Fig 2).

Effect of Cassava peel Compost and Mineral fertilizer on Soybean seed elemental Composition

Analysis of variance showed significant difference among the treatments applied with respect to soybean seed N, K and Cu content (Table 2). Seed N content was highest with non –fertilized plant followed by sole application of cassava peel compost while the least was obtained with use of 150 kg NPK ha-1 + 1.25 t ha-1 CPC. The seed K content varied significantly with applied fertilizer types but do not take any definite pattern. The K content obtained with 50 kg NPK ha-1 + 3.75 t ha-1 CPC treatment was not differed from those of 200 kg NPK ha-1 and 100 kg NPK ha-1 + 2.5 t ha-1 CPC treatments. The pattern of variability in seed Zn as response to applied fertilizer sources was almost the same observed for K; when 50 kg NPK ha-1 + 3.75 t ha-1 CPC was applied and produced the highest

The highest crude protein content (32.1%) was recorded with control treatment followed by the 5.0 t ha-1 CPC and 200 kg NPK ha-1. The least value was obtained with application of 150 kg NPK ha-1 + 1.25 t ha-1 CPC (29.4%). Seed treated with sole application of 200 kg NPK ha-1 gave the least value (18.75). Sole application of 200 kg NPK ha-1 had highest value of crude fibre and the least value was obtained at 5.0 t ha CPC. Seed ash content ranged from 3.5% in unfertilized control to 2.67% in 100 kg NPK ha-1 + 2.5 t ha-1 CPC treatment. The highest seed moisture was obtained with application of 100 kg NPK ha-1 + 2.5 t ha-1 CPC.

Influenced of cassava peel compost and Mineral fertilizer on Nutrient use efficiency

The nutrient use efficiency (NUE) varied significantly across the applied treatments (Table 3). Nutrient was found to be better utilized under combined application of NPK + 50% CPC and this was closely followed by NUE of 200 kg NPK ha-1. The mean NUE value ranged between 0.21 to 3.95 ha_1 with application of 100% NPK having the highest value of 3.95 ha-1. The order of increase in nutrient use efficiency followed 200 kg NPK ha-1 > 150 kg ha-1 1.25 t ha-1 CPC 200 kg NPK ha-1 > 5.0 t ha-1 CPC > 0 kg NPK ha-1 + 0 t ha-1 CPC