Open Access Original Research Article

Effect of Sulphur and Irrigation Regimes on Potato Common Scab Development in Khartoum Area

Awadalla I. A. Irabi, Siddig M. Elhassan, Mohamed Y. A. Abubaker, Abdalla M. Ali

Asian Research Journal of Agriculture, Page 1-10
DOI: 10.9734/ARJA/2017/31196

Potato common scab development was assessed under the traditional farming system (TFS) and modern farming system (MFS) using irrigation interval and side dressing of Sulphur-based fertilizer application along the ridge. The 4-day irrigation interval starting with the tuber formation suppressed the disease development significantly producing 33.6% and 22.2% reductions in scab incidence and severity, respectively. Sulphur applications [Wettable Sulphur and (NH4So4)] resulted in a significant decrease in incidence of 50 and 73% in TFS and MFS respectively; severity was also decreased by 44% and 60% in TFS and MFS respectively. The effect was particularly pronounced when Sulphur was applied at tuber initiation and to a lesser degree when it was applied at planting. The combined effect of short irrigation interval and Sulphur application under TFS had a synergistic significant impact on scab development resulting in ~ 60% and 55.6-58.3% reductions in incidence and severity, respectively. Significant increases in tuber yield of 138% and 91-103% were obtained under TFS and MFS, respectively, when Sulphur was applied at planting. However, the yield was comparatively less when Sulphur was applied at tuber initiation. These results indicate that the common scab of potato in Sudan can practically be managed through short irrigation interval and application of Sulphur-based fertilizers during the early stages of tuber formation at planting or tuber initiation.

Open Access Original Research Article

Callus Induction from Zygotic Embryos of Coconut MATAG F2

A. R. Zuraida, G. Sentoor Kumaran, N. Ahmad, M. S. Syahirah Farhanah, O. Ayu Nazreena

Asian Research Journal of Agriculture, Page 1-6
DOI: 10.9734/ARJA/2017/31258

The effect of 2,4-D (in concentrations of 5.0, 10.0, 20.0 and 40.0 mg/L) applied in combination with BAP (1.0, 10.0 and 20.0 mg/L) on callus induction in coconut MATAG F2 zygotic embryos cultured on Murashige and Skoog (MS) medium was investigated. The effects of IBA, TDZ and NAA combined with 2,4-D were also tested. The best callus formation (20%) was obtained on MS medium supplemented with 2,4-D at 10.0 mg/L. The induced calli were yellowish in colour and structurally compact. Different portions of the zygotic embryo were also compared for callus induction when used as explants and cultured on MS medium supplemented 10.0 mg/L 2,4-D. The incidence of callus formation (up to 83%) was highest from the middle portion of the embryos.

Open Access Original Research Article

Performance Evaluation of Five Boro Rice Cultivars Based on Some Morpho-chemical Characters

M. H. Yesmin, B. C. Sarker, Md. Omar Kayess, Md. Shafiul Azam Sagor, Md. Imanur Rahman, Md. Rakibul Alam

Asian Research Journal of Agriculture, Page 1-11
DOI: 10.9734/ARJA/2017/31039

Aim: To study the performance of five Boro rice cultivars based on some morpho-chemical characters.

Design: The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications.

Place and Duration of Study: The experiment was carried out at the research filed of the department of Agricultural Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during the period of February to May, 2014.

Methodology: The morpho-chemical performance of five selected Boro rice cultivars viz. BINA dhan 7, Hybrid SL-8H, Poshusail, Jirasail and Swarna were evaluated.

Results: The experimental results elucidate that leaf Proline content as well as mineral content was varied amongst the studied cultivar at pre-flowering stage. Results of the study revealed the morpho-chemical, yield and yield attributes were significantly differ of the studied cultivars. The hybrid cultivars showed short plant height, high tillering ability, much leaf number and higher number of grains panicle-1 which support superior growth characters and yield (8.42 t ha-1). Among the cultivars, hybrid rice cv. SL-8H produced the highest yield and higher chlorophyll-a, phosphorus content.

Conclusion: From the present study it may be concluded that Hybrid SL-8H showed the highest yield potential than those of Boro rice cultivars. Therefore, it can be suggested that Hybrid SL-8H might be selected for cultivation in Northwest Bangladesh using modern agronomic practices due to its high yield potential but further study is suggested.

Open Access Original Research Article

Understanding Farmers' Perceptions and Adaptations to Climate Change and Variability in Rice Production at the Kaski and Chitwan Districts, Nepal

Sridhar Khanal, Rishi Ram Kattel

Asian Research Journal of Agriculture, Page 1-12
DOI: 10.9734/ARJA/2017/29761

This study was conducted to access perception of farmers about climate change particularly to access the effect of climatic variables on yield of rice crops based on regression model for 1999-2013 climatic data and yield data. The other objective include to learn adaptation strategies to climate change and assess factor influencing adaptation strategies adopted by farmers in hill (Kaski) and terai (Chitwan) of Nepal. Primary data were obtained through Focus Group Discussions (FGDs) and field survey. Descriptive statistics, time series regression model, logit model and seemingly unrelated regression (SUR) model were used. About 87.5 percent of the respondent perceived the change in weather parameter such as temperature and rainfall. A majority of respondents (96%) perceived the increase in temperature and 83% respondents from Kaski perceived decreasing rainfall trend whereas about 86% respondents from Chitwan perceived increasing rainfall trend. The major climate change adaptation strategies used by the respondents include; rice variety change (61%), better irrigation management (59%), changing cropping pattern (43%), terrace improvement (37%) and direct seeded rice (DSR) adoption (23%) in the study area. The SUR model revealed that age, education, household income were positively and statistically significant on different climate change adaptation strategies for rice cultivation. Time series regression model reveled that total seasonal rainfall for rice cultivation had positively and significantly determined to rice production area, production and yield, but total annual rainfall had negative determination on area, production and yield of rice. Empirical results analysis showed that improved crop varieties and irrigation as the most important adaptation measures. It also revealed that farmers lacked the capacity to implement the highly ranked adaptation practices. Results revealed that farmers facing negative impact of climate change due to low household income and lack of information on adaptation methods. This analysis of adaptation practices and constraints at farmer level will help facilitate government policy formulation and implementation.

Open Access Original Research Article

Factors Influencing Udder and Milk Yield Characteristics of Indigenous Goats in North - West Nigeria

I. M. Sam, G. N. Akpa, C. Alphonsus

Asian Research Journal of Agriculture, Page 1-9
DOI: 10.9734/ARJA/2017/31593

The udder conformation and milk yield characteristics of  agropastoral goats were evaluated using records obtained from a total of 250 does at two locations (Jigawa and Katsina States) over a period of one year. The udder conformation characteristics measured were udder circumference(UC), udder height (UH), distance between teats (DT), teat length (TL), and teat circumference (TC).While the milk yield characteristics were initial yield (IY), average daily yield (ADY), total yield (TY), peak yield (PY), peak day (PD), lactation length (LL) and last day yield (LDY). The effect of  age, parity, breed and coat colour on udder conformation and milk yield characteristics were determined using GLM procedures of SAS; the phenotypic relationship between the udder conformation and milk production characteristics were equally determined. The phenotypic correlation  amongst the milk production traits were significantly positive (P˂0.05; r = 0.261-0.926), similarly phenotypic correlation between udder conformation characteristics and milk yield characteristics were positive except the correlation between PD and  udder conformation characteristics which were negatively weak (r = 0.007 to  -0.007). It was concluded that age, parity,breed and coat colour were factors constituting variations in udder conformation and milk yield characteristics in goats; and morphological characteristics of udder had strong relationship with milk yield, and can be use as selection criteria for improvement of milk yield in goats.