American Journal of Agricultural Research

  • Development and Test of Grain Mass Flow Monitoring System Based on Pressure Sensor

    In view of the technical development requirements of digital agriculture and the requirement of operation parameter regulation in the operation process of grain harvester. An on-board grain mass flow monitoring system based on pressure sensor was developed. The mathematical model of grain mass and grain flow pressure was established, which realized the real-time measurement, display, and storage of grain dry/wet quality information during the operation of grain harvester. An indoor bench test was carried out with the independently developed grain flow monitoring test bench. The results showed that the output error of the grain mass flow monitoring system was less than 4.25% under the conditions of indoor bench test, which meets the accuracy requirements of grain flow monitoring and provides the decision basis for variable seeding and variable fertilization.

  • Identifying the Topographic Slope Characteristics Most Preferred By Wild Olive Trees in Al-Bahah Region, Saudi Arabia

    The aims of this research were to identify the topographical slope characteristics most preferred by wild olive trees in the Al-Bahah region. This study successfully identified the degree of the slope preferred for wild olive groves. The findings revealed that the majority (72.9%) of wild olive trees in Al-Bahah region occupy slopes of 5–30°. However, the patterns in Qelwa and Al-Mekhwah districts are a bit different where most of the wild olives were found on steeper slopes of 20–40°. This is probably because these sub-regions have a medium to steep slope, descending gradually toward the west, the altitudes ranging from 200 (400) to 2001 and 2200 m west of Al¬-Bahah city and Uwera, and between 2000 and 2100 m west of Baljurashi. The results further depicted that the wild olive with the medium-large crown diameter mostly occupied the gentler slopes of 0–25° compared to those with small crown diameters at steeper slopes of 5–35°. This indicates that the wild olive trees grow better on gentler slopes. These findings can be regarded as theoretically revealing the potential landform suitable for olive plantation. As a basis for olive plantation site suitability, these factors are the essential prerequisites to be considered. However. In addition, it is obvious that site suitability is subject to the temporal dynamics of environmental variables.

  • Research Status of Power Allocation of Combine Harvester

    The development of combine harvester has greatly promoted the development of global agricultural mechanization, In this paper, a large number of research results related to power allocation of combine harvesters were collected, The development status of combined harvester transmission system and power test system is summarized through analysis and selection, It is found that there are few researches on the power distribution of the combine harvester, so it is necessary to further study the related research of the combine harvester.

  • Construction of GIS-based Agricultural Machinery IoT Service Platform

    In recent years, as the information technology becomes mature gradually and the modernized agriculture develops rapidly, the important role of agricultural mechanization in the development of the Internet era has gradually become prominent. As an important part of modernized agriculture development, the agricultural mechanization is also facing management problems caused by the information technology in the Internet era. The information shows new characteristics in the development of agricultural mechanization in the Internet era, such as rapid increase in the amount of information, faster data transmission and processing, more diverse data acquisition and processing methods, more and more complex technologies involved in information processing, and more and more extensive fields. As the information becomes diversified, complex and massive, the traditional agricultural machinery service management model shows greater limitations, such as low management efficiency, backward management methods, and low quality levels, etc.. The GIS technology has brought unprecedented development opportunities for the development of agricultural informatization. It plays an important role in promoting the improvement of agricultural machinery informatization to develop the agricultural machinery IoT service system by using the GIS technology.

  • In-vitro Antioxidant Capacities and Genetic Classification of Indonesian Selected Pigmented Rice

    Rice is a world-famous cereal food divided into pigmented and non-pigmented rice. Pigmented rice is popular as healthier food than non-pigmented rice due to its potency as an antioxidant. Nevertheless, the potential of pigmented rice has not been widely studied. Indonesian selected pigmented rice protein’s antioxidant potential and the non-protein compound were in-vitro studied. The antioxidant potencies were evaluated by extracting fresh seeds of nine pigmented rice (Aek Sibundong, Beureum Taleus, Gogo Niti-2, Lamongan-1, Merah SP, Merah Wangi, Mota, Ketan Hitam-2, and Super Manggis) and non-pigmented rice (IR-64) as control. Various free radical scavenging methods to determine the antioxidant activity (ABTS•+, DPPH•, OH• and O2-) were conducted. Meanwhile, the genetic classification was performed by a simple sequence repeat (SSR) marker to determine the relationship between varieties. The results showed that protein of Ketan Hitam-2 had the highest ABTS•+ radical scavenging (98.06%), followed by Beureum Taleus (42.54%). Ketan Hitam-2 protein also showed the highest OH• and O2- activities (43.49% and 6.02%, respectively). The highest DPPH• potency of the non-protein compounds also shown by Ketan Hitam-2 (32.23%) with the activity of OH• and O2- (20.63% and 14.56%, respectively). These results showed that Ketan Hitam-2 has the highest potency as an antioxidant, which could be recommended as a nutraceuticals compound.

  • The social and economic diversity of the coffee-banana farming system and technology uptake in Central Uganda

    Food systems of the future that will guarantee food and nutrition security of millions of poor farming households will have to be both economically and socially diverse. Diversity of farming systems acts as a catalyst for innovation, commercialisation as well as technology adoption. This study sought to find farm typologies and explore the social, enterprise and economic diversity of the various farm types based on a promoted Growing Bananas with Trees and Livestock (GBTL) technology system that was implemented by National Agricultural Research Organisation and Bioversity International in three districts of Central Uganda, Kiboga, Nakaseke and Ssembabule. Using Principal Component Analysis (PCA) and Cluster Analysis (CA), typologies were created in which two distinct clusters of farming households were revealed. Further analysis of the clusters through Food Consumption Scores, food classes, and other descriptive statistics indicated that the two clusters were socially and economically diverse. Findings indicated that Cluster 1 is made up of smaller farms with high crop diversity. Families in Cluster 1 sell more of their produce and subsequently have lower food security compared to the land-abundant, off-farm earning and more food secure Cluster 2. We failed to reject the hypothesis that socially and economically diverse farmers adopt technologies more given that the level of GBTL adoption was about 25% and about 70% for Banana + Goats within both clusters.

  • Evaluating the Potential for Improved and Sustainable Adoption of Conservation Agriculture in Northern Namibia

    The study evaluated the potential for improved and sustainable adoption of conservation agriculture in five regions in Namibia namely, Omusati, Kunene, Oshikoto, Ohangwena, and Oshana. Conventional system of farming involves, monoculture and deep soil tillage with ox-drawn ploughs with limited mechanisation. These practices are unproductive and unsustainable given increased uncertainty due to climate change.Therefore, conservation agriculture was introduced in the regions through the Food and Agricultural Organisation’s (FAO) assisted programme. The aim of the programme was to lower vulnerability by increasing the resilience of the smallholder farmers in the selected regions to adapt to climate change risks through the implementation of Conservation Agriculture (CA) and other complementary Good Agricultural Practices (GAPs). The hypothesis is that increased CA knowledge would enhance improved outcomes. An empirical estimation of the relationship between the farmers learned CA skills, and the level of CA outcome was carried out using econometrics method. One hundred and forty-four farmers were sampled from the selected regions. The result indicates that additional CA knowledge may result in farmers’ improving their General Agricultural Practices. In order words, farmers are more likely to improve weeding than not, the area planted is more likely to increase than decrease and fertilizer application is more likely to increase significantly than not. There is an increase in the ordered log-odds of moving from a lower to a higher outcome level. For instance, a one-unit increase in the farmers’ CA knowledge will result in 0.05 unit increase in ordered log-odds of being in the higher category for the ‘area planted’ outcome variable while the other variables in the model are held constant. The same relationship applies to other outcome variables for farmers’ improved knowledge. In addition, the sustainability of the CA project was investigated. Using a probit probability choice model, it was found that CA adoption will…

  • Development of a General-Purpose Test Platform for Agricultural Navigation

    Field tests are necessary in establishing navigation models and algorithms for agricultural vehicle robots. And it costs much to use tractors or combine harvesters as the platform in terms of system modification, routine maintenance and fuel consumption. The objective of this research was to develop a general-purpose test platform for conducting experiments in agricultural autonomous navigation at a low cost based on a commercially available electric vehicle. A brushless motor was utilized as the power source for automatic steering. An analog PID controller was designed to compare steering commands and actual steering angle and calculate an appropriate voltage signal as the input of the motor driver. A rotary encoder was attached to the driving wheel and a digital PID controller was implemented to determine the throttle value in real-time in maintaining the test platform at a desired speed. A CAN-bus network was established to integrate the automatic steering system and the speed control system as two nodes for information communication. And a CAN node interface was reserved for receiving commands from autonomous navigation systems to be evaluated. Field tests showed that RMS errors were 2.6 cm and 0.054 m·s-1 for lateral offset and speed control, respectively, in tracking straight paths, which indicated that the newly developed test platform met requirements for agricultural navigation experiments.

  • Active ingredients for weed control of food and vegetable crops in northern Côte d’Ivoire

    Agriculture in the north of Côte d’Ivoire, like the rest of the country, is undergoing genuine development. This situation is leading producers to adopt new cultivation techniques, including the use of herbicides for weed control. Herbicides have advantages and disadvantages in their handling. Knowing how dangerous these products can be, identifying them would be advantageous, hence this study. The main objective of this study is to establish a list of herbicides used on vegetable and food crops in the study area. In the departments of Boundiali, Ferké, Korhogo, and Séguéla directed interviews were conducted with traders, producers, and firms. They focused on the active ingredients of the herbicides, the type, and the mode of use. At the end of the study, seventy-seven herbicides divided into twenty-two active ingredients were identified. Glyphosate was the most present followed by nicosulfuron. To conclude, it should be noted that herbicides are present in the habits of the producers in our study area. They still do not use the products according to the standards. These results will help improve the quality and sustainability of agriculture.

  • Design of Twin Screw Feather Extruder and Study of Screw Parameters

    Poultry feathers are rich in amino acids and keratin resources, which is a kind of protein feed raw materials with high nutritional value. A twin-screw extruder was designed to deal with the environmental damage caused by the shortage of rapidly developing protein feed and the large amount of feather waste in China’s livestock breeding industry. The bulking machine can break the disulfide bond and hydrogen bond in feather keratin to form crude protein which can be absorbed by livestock. A kind of high-protein feed feather powder was developed while protecting the environment. The combination mode and rotation direction between two screws are discussed, the relationship between the key basic parameters of the twin screw is derived by combining the motion principle of the twin screw and the relative geometric position. It provides theoretical basis for determining screw parameters and working condition parameters in the following experimental research.