Open Access Original Research Article

Inter & Active Effect of Tillage and Nitrogen Fertilizer on Maize (Zea mays L.) Performance on a Humid Alfisol Southwestern, Nigeria

Michael Rotimi Olojugba, Ibiloye, John Olufemi

Asian Journal of Soil Science and Plant Nutrition, Page 1-11
DOI: 10.9734/ajsspn/2019/v4i330044

A field trial was conducted in 2017 to investigate the interactive effect of the land preparation methods and different rates of nitrogenous fertilizer on maize performance and yield southwestern Nigeria. The experiment was a 3 by 3 factorial; conducted in a Randomized Complete Block Design (RCBD) in a split plot management with tillage systems (T): Convectional tillage (CT), Reduced tillage (RT) and No-tillage (NT) as the main plot while nutrient amendments (N) rates (0, 50, and 120 Kg N.Ha-1) as sub-plots factor and all treatments were replicated three times. Growth and yield parameters were subjected to analysis of variance (ANOVA). No tillage had the least plant height, stem diameter and stover weight but had the highest grains yield. Grain yield were not statistically different in all the tillage practices at different N rates applied but 60 kg N ha-1 seems  best for maize production in the study area.

Open Access Original Research Article

Effect of Biofertilizer on Growth and Yield Characteristics of Zea mays L. in Different Ecological Zones in Kenya

Ashmitha S. Kumar, Wekha N. Wafula, Nicholas K. Korir

Asian Journal of Soil Science and Plant Nutrition, Page 1-7
DOI: 10.9734/ajsspn/2019/v4i330045

In order to reduce the dependence on chemical fertilizers, alternative methods should be developed which will provide nutrients to plants. The increased cost of inorganic fertilizers, including their inability to condition the soil and their polluting effect on the environment, has directed attention towards other sources of soil fertilization to enhance maize production. Hence, this study was carried out to determine the effect of Effective Micro-organisms (biofertilizer) comprising Pseudomonas spp, Saccharomyces spp, Bacillus subtilis and Lactobacillus spp. on the growth and yield components of Zea mays L. The trial plots measured 4 m×3 m and the experimental design was randomized complete block design (RCBD) with 4 treatments namely; Biogrovit (biofertilizer) alone; conventional fertilizer alone, Biogrovit plus conventional fertilizer combined and the control. It was replicated three times. Biogrovit was soil drenched in plants at an interval of 14 days in crops established at two sites in Kirinyaga and Machakos County. Significant differences were observed in the leaf area where application of the biofertilizer had the largest (995 cm2) while the least was under the control (529 cm2). The grain yield was notably influenced by application of treatments at both sites, where the highest was recorded under the biofertilizer in Kirinyaga (8.6 t/ha) and Machakos (7.77 t/ha) which was not significantly different from that of the conventional fertilizers in Kirinyaga and Machakos at 7.55 t/ha and 6.87 t/ha respectively. The control had the lowest grain yield in both sites. The 1000-grain mass, ear length, cob weight, number of cobs per plant and the number of kernels per cob directly influenced the actual grain yield as they were higher for both biofertilizer and chemical treatments. The application of Biofertilizer and conventional fertilizer combined at full rates were antagonistic as most of the parameters tested had lower counts than when independently applied. Therefore, the findings of this study suggest that biofertilizers enhance the growth of maize and as such its use should be encouraged because it is eco-friendly.

Open Access Original Research Article

Impact of Trichoderma Enhanced Composting Technology in Improving Soil Productivity

M. A. Matin, M. N. Islam, N. Muhammad, M. H. Rahman

Asian Journal of Soil Science and Plant Nutrition, Page 1-19
DOI: 10.9734/ajsspn/2019/v4i330046

Objectives: The study was conducted to determine (i) suitable waste, its quantity and dose of Trichoderma harzianum suspension and (ii) the impact of tricho-compost application on soil productivity.

Materials and Methods: Soil properties were tested before and after application of Trichoderma enhanced composting technology at five different districts of North-West Bangladesh. RCBD was used in the experiment where six biodegradable substratum were used and mixed with Trichoderma suspension in each pit. These six substratums were mixed with five doses of Trichoderma suspension i.e., 0, 250, 500, 750 and 1000 ml per 100 kg substratum with three replications and therefore 90 pits were prepared to conduct the experiment. Nutrient content like N, P, K, B, S, Zn, soil pH and organic carbon were analysed in the laboratory.

Results and Discussion: Among the composting materials potato plant, water hyacinth, cowdung and household waste produced better compost than rice stubble and bio-slurry. Trichoderma suspension dose on 100 kg substratum 750 and 1000 ml showed better efficacy than other doses in terms of decomposition time, quantity of produced composed and nutrient value. The status         of nutrient in soil were compared before and after interventions of Trichoderma suspension by means of using paired t-test and found that soil pH, K, S, Zn, N and B were increased significantly, where as organic carbon slightly increased but not significant changed and P decreased significantly.

Conclusion: There should be ample scope to be created tricho-compost everywhere for soil improvement for better crop production towards food security and improved livelihoods.

Open Access Original Research Article

Effect of the Organic and NPK Fertilizers on the Growth and Yield of Sweet Potato (Ipomoea batatas (L) Lam) in the Centre of Côte d’Ivoire

Bakayoko Sidiky, Konate Zoumana, Dibi Konan Evrard Brice, Kouassi Jean Hugues Martial

Asian Journal of Soil Science and Plant Nutrition, Page 1-14
DOI: 10.9734/ajsspn/2019/v4i330047

In Côte d’Ivoire, the sweet potato is little cultivated but stays however a culture of pension and a food mattering in certain regions. This study was conducted to assess the effect of the application of mineral (NPK 15-15-15, NPK 12-22-22) and organic (poultry manure) fertilizers on yield components of sweet potato (Ipomoea batatas (L) Lam). The experiment was conducted over two years (2016 to 2017) in experimental station of National Center of Agronomic Research (CNRA) of Bouaké in the centre of Côte d'Ivoire. The experiment was conducted following a split plot with 2 factors (variety and fertilizers) and 3 replicates. The main factor was variety with 2 levels (variety Irene and variety TIB-440060) and the subplot was fertilizers application consisted 13 levels (200, 300, 400, 500 kg ha-1 of NPK fertilizers combined 5, 10, 15 t ha-1 of organic fertilizer). Thirteen treatments based on poultry manure (T6, T7), chemical fertilizer NPK 15 15 15 (T1, T3, T4, T5) and NPK 12 22 22 (T8, T10, T11, T12) and their combination (T2 and T9) were tested. The experimental results revealed that that the effects of chemical fertilizer treatments, manure and their combination with mineral fertilizers did not influence the measured parameters. The results also showed that fertilizers improved all the agronomic parameters of sweet potato compared to the control treatment during two years of experiment. However, the Irene variety with a mean weight of 180 g tuberous roots was significantly different from the TIB variety with a mean weight of 138.73 g.

In the conditions of our study and over the two-year period, producers of sweet potatoes would benefit from using organic fertilizers with the Irene variety.

Open Access Original Research Article

Screening Winged Bean (Psophocarpus tetragonolobus (L) DC) Accessions Using Agronomic Characters

Lawal, Babatunde Akeem, M. A. Azeez, Egedegbe, Godfrey, Raji, Ibrahim Akintunde, A. M. Omogoye, Akintola, Ezekiel Kayode

Asian Journal of Soil Science and Plant Nutrition, Page 1-10
DOI: 10.9734/ajsspn/2019/v4i330048

Aim: This research aimed at screening winged bean accessions using morphological characters.

Study Design: The experiment was laid out in Randomized Complete Block Design and replicated three times.

Place and Duration of Study: The experiment was carried out at the Teaching and Research Farm, Ladoke Akintola University of Technology, Ogbomoso situated on longitude 8°7' N, latitude 4°14' E, and at altitude of 323.5 m above sea level.       

Methodology: Seeds of thirty-eight accessions of winged bean were obtained from the International Institute of Tropical Agriculture, Ibadan and were evaluated. Data were collected on germination count at 2, 3 and 4 weeks after planting (WAP), days to first and 50% flowering, days to first and 50% podding, top leaflet length, petiole length, secondary vine lengths at 8 and 9 WAP, pod length, and number of seeds per pod and were subjected to analyses variance.

Results: Accessions exhibited significant (P≤0.05) variation for flowering and podding dates, petiole length and top leaflet length. Days to first flowering varied from 68 to 114 days after planting (DAP) with an average of 76 days while days to 50% flowering ranged between 78 and 121 days with a mean of 83 days. Number of seeds per pod varied from 7 to 15 seeds per pod among the accessions with a mean of 12.5 seeds per pod while pod length varied from 12.3 cm to 25.6 cm with a mean pod length of 22.2 cm. Accessions TPT 26 and TPT 32 were consistent for early flowering and high seed yield and are therefore recommended for further adaptation and nutritional trials.