Agriculture

Field trials were conducted during the rainy seasons of 2005, 2006 and 2007 at the Research Farm of Institute for Agricultural Research Samaru  (11⁰ 11^/ N, 07⁰ 38^/E, and 686m above sea level) to study the yield and economic returns of sesame as influenced by poultry manure, nitrogen, and phosphorus. The experiment consisted of four rates of poultry manure (0, 5.0, 10.0, and 15.0 t ha^-1), three levels of nitrogen in the form of urea (0, 60, and 120 kg N ha^-1) and three levels of phosphorus in the form of single super phosphate (0, 13.2 and 26.4 kg P ha^-1). The thirty six treatment combinations were laid out in a split-plot design with three replications. The factorial combinations of N and P were assigned to the main plot while poultry manure was assigned to the sub-plot. Yield of sesame per unit area and economic returns were better at 5 t ha^-1, 60 kg N ha^-1 and 13.2 kg P ha^-1 of poultry manure, nitrogen and phosphorus respectively. Applications of 5 t ha^-1 of poultry manure, 60 kg ha^-1 of nitrogen and 13.2 kg ha^-1 of phosphorus seems to be the ideal rates for sesame production in this agro ecology and is therefore recommended.

This project has been conducted in New Zealand in 1999, as a requirement for feed production companies to control salmonella in feed by Ministry of Agriculture and Fisheries (MAF). Feed is the most important factor in poultry production enterprises because of its impact on cost and health. Many chicken producing companies realize that, reducing salmonella in poultry meat is one of the difficult tasks, because there are several factors affecting this process. Producing Salmonella negative birds is the aim of many countries, because of the government regulations, public health concern, and competition between companies. It is impossible to reduce or eliminate salmonella in bird’s guts if the litter is used more than one time, especially if the litter is salmonella positive. It takes the feed about two minutes to reach the 80 ºC. The feed could be recycled if didn’t reach the 82-83 ºC planned. Steam temperature was stable and around 130ºC. This temperature could be optimized to reduce energy cost without affecting the pelleting process through tracing the feed in temperature (ingredients) one can say, that some of the steam is entering to the feed in tube and raising the feed-in temperature. The incoming feed temperature is between 46-50 ºC.

The energy use and influences of energy inputs on output levels in corn grain production were investigated. For this purpose, the data on 100 corn grain production farms in the Khozestan province, Iran, were collected and analyzed. The output level was specified as a function inputs and output, and ordinary least squares were employed to estimate equation parameters. The results indicated that total energy input for corn grain production was about 392323 MJha–1; Chemical fertilizers (with 44 %) and electricity (with 27 %) were amongst the highest energy inputs for corn grain production. The energy ratio, energy productivity, specific energy and net energy were 2.6, 0.18 kgMJ–1, 5.66 MJkg–1 and 59248.58 MJha–1 respectively. The regression results indicated that the contribution of energy inputs on crop yield was significant. Sensitivity analysis indicates that the major MPP was drawn for seed and chemical fertilizers energy. Economic analysis indicated that the total cost of production for one hectare of corn grain production was around 1955 $. Accordingly, the benefit–cost ratio was 1.75. The total amounts of CO2 for corn grain production was calculated as 1.54 tonha-1, which indicated the high CO2 output in this cultivation. The use of diesel fuel and chemical fertilizer is in excess for corn grain production, causing an environmental risk problem in the region. The high rate of non-renewable energy utilization in this region can be controlled by using farmyard and green manure instead of chemical fertilizers.

Fruits and vegetables are high value commercial crops grown in an area of about 16.19 million hectares with a production of 243.47 million tones in India in 2012-13. Over the years (2001-02 to 2013-14), there is an increase in area, production and productivity of fruits with compound growth rate of 5.71, 6.31 and 1.08 percent respectively. In addition, there is an increase in area, production as well as productivity of vegetables with compound growth rate of 3.99, 6.20 and 2.13 percent respectively. Seasonal variability in fruits and vegetables has shown inverse relationship between arrivals and prices. At the time of harvesting, there is glut in market that adversely affects the prices because of which seasonal indices for arrivals are maximum and corresponding prices are relatively low. Pre-harvest losses occur due to attack of insect- pest, rodents, birds and infestation of weeds and diseases. Post harvest losses for fruits and vegetables occur in different stages of marketing viz. picking/ plucking, assembling, grading, packing, storage, loading/ unloading, transport etc. In India, the scientific storage capacity is only 30 percent of the required capacity. Cold storage facility is available for only 10 percent of fruits and vegetables. Only 2-3 per cent of the produce is processed in India. Due to lack of proper handling (cleaning, sorting, grading and packaging) facilities at the village level with about 30 percent of fruits and vegetables and 10 percent of spices are lost before reaching the market. There is a wide scope of increase in processing capacity for fruit and vegetable industry.

Stable isotopes of hydrogen (?²H) and oxygen (?¹⁸O) in groundwater, streams and Volta Lake collected in southwestern margin of the Volta Lake were investigated. While the spatial distribution of ?¹⁸O in groundwater (-3.61 to -2.17 ‰ vs VSMOW) showed that most of the heavy-isotope depleted samples were located in the higher portion of the study area (northeastern) on the Kwahu Plateau, more positive values (from -2.62 to -2.17‰ vs VSMOW) were found in areas in proximity of the Volta Lake. The isotope composition of streams (?¹⁸O) varied closely from -2.80 to -2.61‰ vs VSMOW with most depleted being the most forested stream. The Volta Lake showed relatively enriched and homogenous isotope composition (?¹⁸O between -0.66 and -0.43) reflecting high evaporation of the Lake. Stable isotope signature of the water samples point to meteoric origin of recharge to groundwater in the area also show possible intrusion of Volta Lake into the aquifers near the banks of the Volta Lake.

Fruits are important elements of a healthy, balanced diet, be it as part of a main meal or as a snack. The quest for ready-to-eat fruits has resulted in cut-fruits such as pawpaw, watermelon and pineapple in the Ghanaian fruit market. However, the safety and quality of these products cannot be guaranteed due to the mode of preparation and packaging. These products have longer shelf life when properly preserved and, therefore, assure all year round availability of fruits in different forms. The objective of this study was to assess consumer knowledge, perception and acceptance of fresh-cut fruits and irradiated fruits in Ghana. This was a cross-sectional study involving respondents in Accra (a cosmopolitan city). Information was collected by an open-ended questionnaires administration. The responses were coded and analyzed using SPSS Statistical Software Version 16. The results revealed that consumption of fruits and cut-fruits in Greater Accra is relatively high. It showed that 94.5 % of the respondents like fruits of all kinds. Mango was the most preferred (40.5 %) and 79 % of respondents preferred the seedling (local) mango to the grafted (exotic) variety. More tertiary educated people (48 %) consume fruits than others. More people (69 %) always buy cut-fruits and more males (63.5 %) patronize cut-fruits than females. People between the ages of 21 – 30 years patronize more cut-fruits and only 52 % of the respondents have heard about irradiated fruits, however, only 47 % would buy irradiated fruits because they are hygienic and safe. Others associated irradiation with radioactivity. The knowledge of fruits irradiation is very low in Ghana however; the consumption of fresh cut- fruits is high.

Farming today has gone beyond subsistence farming that produces for the farmer and his household. Research shows that the consumption of grains or cereal crops is at an alarming rate in the world, so to encourage small farm holders a manually operated multi-crop hand push planter with changeable metering devices for cowpea, maize and soybean was designed, fabricated and evaluated to improve planting efficiency and reduce drudgery involved in manual planting method. The laboratory and field tests were conducted to determine weight of seeds discharged from the planter, seed percentage damage, field capacity, average depth of placement of seeds in furrow, average inter-row spacing of seeds and the emergence of the seedlings. Results revealed that the planter had field efficiency and field capacity of 76.3% and 0.39 ha/hr with seed rate of 0.25 kg/ha, 0.18 kg/ha and 0.21kg/ha respectively for cowpea, maize and soybean. Percentage difference between the seed damage of 3.54%, 2.32% and 1.32% of cowpea, maize and soybean respectively obtained was from an average spacing of 40.8cm and depth of 3.98cm. The single-row multi-crop planter is very simple to use and it is maintenance free, except for the bearings which needs to be lubricated from time to time to allow the planter's ground wheel to move freely. For this design, the drive shaft directly controls the seed metering mechanism which eliminates completely attachments such as pulleys, belt systems, and gears thereby eliminating complexities which increase cost, and increasing efficiency at a highly reduced cost which is the focus of this project work. The planter can be easily maintained without any technicality and all materials used for the fabrication are locally available in the case of worn - out parts.

The magnitude of heterosis in fifty crosses (F1s) made by crossing five sudan grass pollinators with ten cytoplasmic male sterile lines in a line x tester mating design in forage sorghum. Based on per se performance and heterotic response eleven crosses for resistance to shoot fly infestation over better parent and six crosses for total soluble solid, SP 55609 A x PC 8 for protein per cent, 2219 A x PC 8, 2219 A x CSV 15, MR 750 A2 x CSV 15 for HCN content and ICSA 469 x PC 5 for IVDMD per cent were appeared best cross combinations for all three kinds of heterosis and could be used for commercial exploitation of good quality forage sorghum after multilocation testing.

Ions concentration of seventeen wheat cultivars (Triticum aestivum L.) in NaCl salinity (16 dS m-1 and two weeks exposure) was assessed to evaluate the ability of these traits in salt screening. There was an increase in Na+ concentration and decrease in K+ concentration in salinity stress compared to control condition in shoot parts. Even thought, there was a clear relation between salt tolerance or salt sensitivity and Na+ concentration in shoot plant. It seems that the increase in concentration of Na+ concentration can be criteria to distinct salt tolerance in the shoot of early wheat plant. Therefore Na exclusion measurement can be applied with other trait such as yield and yield components to screen wheat cultivars in salinity condition.

The phenotypic correlations among egg weight, external and internal egg quality traits of two commercial egg type chickens, Isa brown and Harco black chickens were determined. A total number of 200 point of lay hens of 100 each of Isa brown and Harco black were used for the study. Data were collected on egg weight, egg length, egg content, shell weight, shell thickness, yolk weight, albumen height, albumen weight, yolk height, yolk length and yolk colour, from 960 eggs consisting 40 each of the strain analyzed on weekly bases for 12 weeks. Results shows a significant (P<0.05) effect between the measured parameters and the two strain of hens. Isa brown eggs had higher values of egg length (54.12mm), egg content (45.48g), shell weight (4.68g) and albumen length (5.75mm) than its counterpart Harco black eggs. The association between egg weight and other egg biometrical traits were found to be positive and very highly significant (r = 0.31- 0.80; p<0.0001) while other egg parameters were either positively or inversely correlated with each other for Isa brown strain. The relationship between egg weight and other egg biometrical traits were found to be very highly significant (p<0.0001; r = 0.73) while other egg variables were also either positively or inversely correlated with each other for Harco black strain .It can be concluded that Isa brown hens eggs was better than Harco black hens in respect to egg length, egg content, shell weight and albumen length while the phenotypic correlation coefficient results can be used in selection criteria.