Open Access Original Research Article

Phenology, Thermal Integral and Agronomic Yield of Cotton (Gossypium arboreum L) at a Function of Date of Planting in Dry Weather

J. M. Loeza-Corte, E. Díaz-López, I. Brena-Hernández, A. Morales-Ruíz, J. M. E. Aguilar-Luna, B. Laureano-López, J. A. Linares-García

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/AJEA/2016/21054

The aim of this study was to know the effect of planting date (early and late) on the phenology and thermal integral of an accession of Gossypium arboreum L. to evaluate fiber and seed yields and harvest index. Design randomized complete block with four replications (4x3) = 12 experimental units was used. The experiment was carried out at the Universidad de la Cañada in Teotitlán de Flores Magón, Oaxaca, Mexico, from May to October 2012. The experiment was conducted in the field, fertilizing the soil and with a topological arrangement (0.30 x 0.30 x 1.0). Both seed and fiber yields were determined gravimetrically, and harvest index by the ratio between the agronomic yield and the biological yield. The results indicate that the highest seed yield, fiber and seed harvest index, was achieved in early planting dates and crop phenology was not altered by treatment effect. From this study it could be concluded that the cotton might be an option to plant under the conditions of the tropical dry forest of Oaxaca.

Open Access Original Research Article

Effects of Incision Variation Length on Heterobranchus bidorsalis Male Spawners to Extract Milt for Induced Breeding

T. A. Yisa, S. L. Lamai, S. M. Tsadu, R. J. Kolo

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/AJEA/2016/20510

Matured African catfish (Heterobranchus bidorsalis), size ranging from 1.40-2.00 kg average total body weight (TBW) and mean length 44.50 cm were procured from a private fish farm and transported in perforated 50 litre water holding capacity jerry can to the hatchery and maintained for 2 weeks. They were fed with 40% crude protein commercial diet with good water quality management before being used for breeding. Incision at variation length 2.50, 3.40 and 4.00 cm were made on the abdominal region (gonad position) of the male spawners after anaesthetic treatment using sterilized surgical instrument to extract milt to fertilize egg. The incised position was sutured using simple interrupted suture pattern with catgut chromic 2/0 stitch. The spent spawners after operation survived on gradual healing and recuperation within 14 days post- surgery. Fecundity, volume of milt extracted, percentage fertility and hatching differed significantly (P<0.05) among treatments. Treatment 3 (3.40 cm) was the most effective incision length that gave best results in term of percentage hatching (92.04a), weight gain (28.37), specific growth rate (2.36) and percentage survival (68.77±4.224a) of the bred hatchlings as compared to other treatments. The male spawners of H. bidorsalis could be incised (cut) on abdominal region (gonad position) at length of 3.40 cm to effectively extract milt to fertilize egg without adverse effect on the fish to enhance fingerling production. 

Open Access Original Research Article

Cultivars Response to Morphological and Yield Attributes of Okra at Sylhet Region

S. R. Saha, A. F. M. S. Islam, M. M. Rahman, M. M. Hasan, R. Roy

Journal of Experimental Agriculture International, Page 1-7
DOI: 10.9734/AJEA/2016/20799

An experiment was conducted at the field laboratory of Department of Crop Botany and Tea Production Technology, Sylhet Agricultural University from May to October 2013 with a view to select the superior Okra cultivar (s). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. A total of 8 cultivars viz. BARI Dherosh-1 (control), Orka Onamika, Bankim, Durga, JO (Japanese Okra)-1, JO-2, JO-3 and JO-4 were evaluated in relation to morphological and yield attributes in acidic soil conditions. Significant variations were observed in almost all parameters. Results revealed that high yielding cultivar Bankim exhibited taller plant at final harvest, produced early flowers with maximum fruit setting (%) and fruit length. The cultivar JO-3 produced maximum number of branches and leaves at final harvest. Local check cultivar showed highest internodes number and length along with maximum number of flowers and 100 seed weight. The cultivars JO-1 and JO-4 showed highest individual fruit weight and maximum fruit diameter, respectively. The cultivars Bankim was proved to be promising cultivars in acid soil conditions of Sylhet considering overall performance of morphological and yield attributes.

Open Access Original Research Article

Effect of Planting Date and Plant Densities on Yield and Yield Components of Sweet Corn (Zea mays L. var saccharata)

Atena Rahmani, Majid Nasrolah Alhossini, Saeed Khavari Khorasani

Journal of Experimental Agriculture International, Page 1-9
DOI: 10.9734/AJEA/2016/19592

An experiment was carried out to investigate the effect of planting date and plant densities on yield and yield components of sweet corn at agricultural and resources research center of Razavi Khorasan, Iran during 2009 growing season. A split plot experiment, based on randomized complete block design with four replications performed using SC 403 cultivar. The main plots belonged to three planting dates (D1: May 15, D2: July 4, D3: July 25) while subplots belonged to different plant densities (P1: 66600, P2: 83300 and P3: 111000 plants ha-1). There was significant different between planting dates in respect of plant height, ear height, leaves number, leaves number above ear, stalk diameter, de-husked ear yield, conservable grain yield, ear number per plant, grain rows per ear, ear length and diameter, grain depth, 1000- grains weight and harvest index. The highest (18.27 t ha-1) and lowest (0.93 t ha-1) conservable grain yield produced at D1 and D3 respectively. Delay cropping resulted in lower grain yield due to lower growth duration, lower temperatures and solar radiation at late season. There was significant difference between different plant densities in respect of ear yield, de-husked ear yield and fresh forage yield. The highest (8.86 t ha-1) and lowest (7.69 t ha-1) grain yield observed for P3 and P1 respectively. Harvests invest affected by interaction between planting date and plat density. The highest conservable grain yield produced at May 15 at the highest plant density level (111000 plants ha-1).

Open Access Original Research Article

Assessment of Rural Infrastructural Development Projects in Ondo State: Case Study of Ondo State Community and Social Development Agency

B. O. Akinwalere, M. O. Ajibola

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/AJEA/2016/20041

This study was conducted to assess the impact of rural infrastructural projects in Ondo State using the bottom-up approach (Community Drive Development) through the Ondo State Community and Social Development Agency (ODCSDA). A multi-stage sampling technique was used. In the three(3) senatorial districts that constitute Ondo State, six (6) local government areas (LGAs) were randomly selected from existing eighteen (18) LGAs on the basis of two (2) LGAs from each of the senatorial district, and six (6) Communities were purposively selected from each of the selected LGAs based on the presence of fully completed and functional projects. Ten (10) respondents were randomly selected in each of the communities making a total sample size of sixty (60) respondents. A likert scale perception tool was used to investigate respondents’ level of project identification, project planning and implementation, socio-economic impacts of projects and its sustainability. Descriptive statistic, Pearson correlation and Relative Importance Index (RII) were used for analysis. Results showed that more than eighty percent (80%) of the respondents were fully involved in project identification, planning and implementation in their respective communities. Level of community contribution and participation project identification, planning and implementation, location of project, standard of project implemented were found to have positively affected their perception of project sustainability. Study also showed that community participation and sustainability of infrastructural projects were significantly related.

Open Access Original Research Article

Assessing Efficiency and Economics of Different Sources of Phosphorus in Alkaline Calcareous Soils for Wheat Production

Fatma Bibi, Ifra Saleem, Shabana Ehsan, Abid `Niaz, Shakeel Ahmad Anwar, Sadia Sultana, Zahid Ashfaq Ahmad

Journal of Experimental Agriculture International, Page 1-8
DOI: 10.9734/AJEA/2016/20455

Phosphorus (P) is an essential nutrient needed for plant growth, root development and grain production. Application of humic acid (HA) is considered to improve the plant growth and enhances stress tolerance. The decrease in amount of arable land and hiking prices of chemical fertilizers are a huge challenge for farmers. The prices of phosphatic fertilizers, especially the diammonium phosphates (DAP) urge the need to explore the cheaper sources of P. Therefore a three year field study was conducted to compare the efficiency and economics of phosphoric acid (PA) with two other traditional sources of P viz. single super phosphate (SSP) and DAP for optimum wheat grain production. Six treatments applied were Viz. Control, recommended dose (RD) of P from SSP, RD of P from DAP, RD of P from phosphoric acid (PA), RD of P from SSP + HA, RD of P from DAP + HA. These P fertilizers were applied at the recommended rates for wheat (90 kg ha-1) from SSP, DAP and PA. HA was also applied at the rate of 15 kg ha-1. PA was applied at first irrigation of wheat crop. The experiment was conducted at Soil Chemistry Section, ISC&ES, Faisalabad, Pakistan, using RCBD with three repeats during (2011-14). Basic soil analysis showed that the field was free from salinity and sodicity hazards with low organic matter status while available P was in the range of low to marginal and extractable K was adequate. Maximum grain yield (4.98 t ha-1) was obtained with the use of DAP fertilizer. The Cost Benefit Ratio (CBR) of DAP (3.0) proved it as most profitable P fertilizer with the maximum benefit return. Further the fertigation of PA did not proved better in terms of CBR while the application of HA with SSP and DAP significantly lowered the CBR.

Open Access Original Research Article

Contributions of Rhizobium Inoculants and Phosphorus Fertilizer to Biological Nitrogen Fixation, Growth and Grain Yield of Three Soybean Varieties on a Fluvic Luvisol

A. L. A. Aziz, B. D. K. Ahiabor, A. Opoku, R. C. Abaidoo

Journal of Experimental Agriculture International, Page 1-11
DOI: 10.9734/AJEA/2016/20072

An experiment to identify an efficient strategy to optimize biological nitrogen fixation (BNF) in three soybean varieties {Jenguma (TGx1448-2E), Anidaso and Quarshie (TGx1445-2E)} was conducted in the experimental field of the CSIR-Savanna Agricultural Research Institute, Nyankpala, Northern Region, Ghana. The experiment had a split-split plot design with three replications and interactions tested were inoculation rate (0, 50 and 100% inoculation) (main plot), soybean variety (sub-plot) and phosphorus rate (0, 22.5 and 45.0 kg P2O5/ha) (sub-sub plot) using maize as a reference crop. The soybean was sown at two seeds per hill at a spacing of 50 cm x 10 cm. The results showed that inoculating soybean with the commercial inoculant Legumefix (Bradyrhizobium strain 532c) had no effect on plant height, nodule number, nodule dry weight, shoot dry weight, pod number, grain yield and 100-seed weight. However, the soybean varieties showed significant differences in pod number, 100-seed weight and phosphorus uptake efficiency (PUE). The amount of N2 fixed (measured by Total Nitrogen Difference method) ranged between 52.3-71.0 kg N/ha. Phosphorus applications of 22.5 and 45.0 kg P2O5/ha increased grain yield by 35.4 and 33.9%, respectively and also increased N2 fixation by 49.39 and 69.82%, respectively over the unfertilized control. The interactions among these treatments did not significantly influence the parameters measured except PUE for which there were significant differences among the soybean varieties and the phosphorus rates. Inoculation did not therefore increase nodulation and BNF of the three soybean varieties but phosphorus application increased the growth and grain yield of the soybeans.q