(ii) Plant spacing of 75 cm x 15 cm which resulted in higher number of cobs/plant and higher grain weight be adopted in maize production.
Field experiments were conducted in 2011 and 2012 cropping seasons in the Teaching and Research Farm of Delta State University, Asaba Campus, Nigeria to evaluate the growth and yield responses of cucumber to five different rates of poultry manure. The study was carried out in a Randomized Complete Block Design (RCBD) with three replicates. Rates of poultry manure in tons per hectare were 0, 5, 10, 15 and 20, while the parameters investigated were vine length, number of leaves per plant, fruit diameter (cm), fruit length (cm), and fruit weight of 'Marketmore'variety of cucumber. The results of the study showed that parameters assessed were significantly influenced by the application of poultry manure. At 4, 6 and 8 weeks after planting, plants that received highest rate of poultry manure (20 tha-1) showed greatest performances. Based on the findings of the study, it was recommended that farmers in the study area can apply 20 tha-1 of poultry manure to increase growth and yield of cucumber.
Many commercial cowpea farmers control insect pests on cowpea with synthetic chemicals and may sometimes spray their farms during the growing season as many as 8 to 10 times. This leads to health hazards and environmental pollution. The present study was conducted to reduce the number of times, cypermethrin (conventional chemical) is applied before harvest and still, produce the expected cowpea grains. The experiments were carried out in two agro-ecological zones - Asaba and Abraka of Delta State during the late cropping season. The experiments consisted of 4 treatments - cowpea plots sprayed 4 times (at 7 days’ intervals), cowpea plots sprayed 5 times (at 10 days’ intervals), cowpea plots whose insect infestation were monitored before chemical application and control plots (without chemical treatment). Each treatment was replicated 3 times. The experiments were organised into a randomised complete block design (RCBD). The results indicated that cypermethrin controlled the major insect pests of cowpea. Second, grain yield was high at both locations; significant differences did not exist (P>0.05) in insect number and grain yield among the treatments. The study provides the evidence that (i) high cowpea grain yield is obtained at reduced number of chemical application of 4 or 5 times during the growing season (ii) Grain yield was significantly (P<0.05) higher at Abraka with1400.60kg ha-1 than Asaba (714.40kg ha-1) during the late cropping season
This study was carried out in the Teaching and Research Farm of Delta State. University, Asaba campus (Nigeria) from March 2008 to June 2010 to evaluate the nutrient content (% dry matter) of maize as affected by different levels of organic manure and inorganic fertilizer. The experiment was carried out in a Randomized Complete Block Design (RCBD) replicated three times in a factorial layout. Four different rates of poultry droppings, cattle dung and NPK 20: 10: 10 fertilizer were applied to three maize varieties sown at 75 cm x 15 cm spacing and the maize grains produced were evaluate for their nutrient content in percentage dry matter. The results obtained indicated that hybrid variety 9022-13 had the highest N, P and K contents (1.03, 1.68 and 0.26, respectively). Also, plants that received inorganic fertilizer had the highest values of 1.27% N, 1.64% P and 0.29% K. Based on rates of application, plants that received 450 kgha -1 NPK 20: 10: 10 fertilizer had the highest values of 1.74% N, 1.71% P and 0.49% K. The interaction effects showed that only variety, manure type and rates % application were significant (P < 0.05). Based on this study, it is recommended that (i) Hybrid variety, 9022-13, which was outstanding in its nutrient content be grown in the study area. Alternatively, farmers who prefer open-pollinated varieties could grow BR 9922-DMRSF 2 or Agbor local variety for people who prefer local varieties in maize production (ii) Spacing of 75 cm x 15 cm (88, 888 plants/ha) which resulted in better growth performance and yield should be adopted in maize production (iii) Farmers who prefer mineral fertilizer for increased growth and yield of maize should apply 450 kg ha -1 of NPK 20: 10: 10 (iv) Farmers who practice organic agriculture in Asaba agro-ecological zone should apply 30 tha -1 of poultry manure to enhance maize yield.
Field experiments were conducted in 2011 and 2012 cropping seasons in the Teaching and Research Farm of Delta State University, Asaba Campus, Nigeria to assess some growth and yield indices of six varieties of watermelon (Sugar baby, Charleston gray, Crimson sweet, Green gold, Jubilee, and Ice box) in Asaba area of Delta State, Nigeria. The experiments were carried out in a Randomized Complete Block Design (RCBD) with three replicates. Four parameters were assessed to achieve the objectives of the study-vine length, number of leaves/plant, number of branches /plant, and weight of fruits at 75 days after sowing. The results of the two-year evaluation indicated that Sugar baby variety was superior at 4, 6, and 8 weeks in the parameters tested with mean vine length of 63.4 cm, 133.1 cm, and 181.1 cm, respectively; mean number of leaves/plant of 30.5, 33.5 and 40.4 respectively; mean number of branches/plant of 5.0, 6.0, and 7.0, respectively; and mean weight of fruits of 1315.43 t ha-1 at 75 days after sowing in 2011 and 2012. Based on the findings of this study, it was recommended that farmers in the study area grow Sugar baby variety for increased growth and yield of watermelon.
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