Trend of fertilizer application during the last three decades (Case study: America, Australia, Iran and Malaysia)

The Maltese agricultural sector faces many challenges including lack of organic matter in its soils. The use of organic fertilizers such as cattle or rabbit manure partly addresses this problem. Different doses of manure of rabbit and cattle manure at specific irrigation regimes were used to assess the growth of crops and production of fruit on aubergine and green pepper plants. The overall mean number of green peppers recorded was significantly different than the mean number of aubergine for all four doses of manure applied, using both rabbit and cattle manure, up to an optimum mean number of fruit produced, the optimum being reached at dose 3 for green peppers and dose 4 for aubergines. Additionally, the mean number of fruit was significantly higher when grown in rabbit than in cattle manure. The mean weight of fruit recorded varied significantly between green peppers and aubergines at the highest dose of rabbit manure. When Nitrogen Use Efficiency (NUE) was investigated, the highest nutrient efficiencies were achieved at the higher fertilizer application rates of rabbit manure while for aubergines, the weight increase was not as significant and it may therefore be possible to compromise yield for a better efficiency.

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Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan

Environments ◽

10.3390/environments8070065 ◽

2021 ◽

Vol 8 (7) ◽

pp. 65

Author(s):

Ruth Anne Gonocruz ◽

Ren Nakamura ◽

Kota Yoshino ◽

Masaru Homma ◽

Tetsuya Doi ◽

...

Keyword(s):

Land Use ◽

Solar Radiation ◽

Rice Yield ◽

Fertilizer Application ◽

Agricultural Crops ◽

Factors Affecting ◽

Photovoltaic Panels ◽

System A ◽

Upper Limit

Agrivoltaic systems, comprising photovoltaic panels placed over agricultural crops, have recently gained increasing attention. Emerging interest in these systems led us to investigate their influence on rice crops. Various factors affecting rice crop yield, including fertilizer application, temperature, and solar radiation, were directly observed, and measured to evaluate changes associated with the shading rates of photovoltaic systems installed above rice crops. The results suggest that the allowable upper limit of the shading rate for agrivoltaic installations ranges from 27 to 39%, which sustains at least 80% of the rice yield, a condition set by the Japanese Ministry of Agriculture, Forestry and Fisheries for these systems. If such systems are applied to rice paddies in Japan at 28% density, they could generate 284 million MWh/yr. This is equivalent to approximately 29% of the total Japanese electricity demand, based on 2018 calculations. This projection indicates the potential of agrivoltaic systems for efficient land use and sustainable energy generation.

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Case Study on the Use of the Leaf-Count Method for Drip Fertigation in Outdoor Cucumber Cultivation in Reconstructed Fields Devastated by a Tsunami

Agriculture ◽

10.3390/agriculture11070656 ◽

2021 ◽

Vol 11 (7) ◽

pp. 656

Author(s):

Yuki Tashiro ◽

Tatsuo Sato ◽

Junjira Satitmunnaithum ◽

Hatsumi Kinouchi ◽

Jianlin Li ◽

...

Keyword(s):

Real Time ◽

Water Extract ◽

Test Site ◽

Fertilizer Application ◽

Tsunami Disaster ◽

Soil Water Extract ◽

Cucumber Yield ◽

Iwate Prefecture ◽

Drip Fertigation

Drip fertigation was tested in fields using a nitrogen fertilization method based on leaf increments, with the aim of increasing the cucumber yield in outdoor fields restored after the tsunami disaster in Rikuzentakata City, Iwate Prefecture, in 2011. The 2016 test site (Takata field) was restored as a paddy field, and there were problems with water retention and gravel contamination. The condition of the 2017 test site (Yonesaki field) was better than that of the 2016 site. The drip fertigation method increased cucumber yield by 93% and 27% in the Takata and Yonesaki fields, respectively, when compared to the yield from fields cultivated conventionally. Drip fertigation enables the constant supply of liquid fertilizer to the rhizosphere, and the easy application prevents the scarcity of fertilizer, especially at later stages of growth. In contrast, a real-time soil diagnosis, using the Dutch 1:2 soil–water extract method, was unsuccessful due to flooding, especially in the Takata field. As the purpose of this method is not to reduce the amount of nitrogen provided, but to increase the yield, and because it is difficult to precisely control the application of fertilizer due to precipitation, we suggest that the real-time soil diagnosis and feedback should be omitted to further simplify fertilizer application.

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Determinants of child Labour in Crop Production (A Case Study of Anambra State of Nigeria).

Sustainability Agri Food and Environmental Research ◽

10.7770/safer-v6n1-art1354 ◽

2018 ◽

Vol 6 (1) ◽

Author(s):

Ume Smiles ◽

C I Ezeano ◽

A. K.O. Nnadozie

Keyword(s):

Crop Production ◽

Sampling Technique ◽

Probit Model ◽

Fertilizer Application ◽

Child Labour ◽

Rural Household ◽

Anambra State ◽

Access To Credit ◽

Household Heads

Determinants of child Labour use among rural household crop farmers in Anambra State of Nigeria were studied. A multistage random sampling technique was used to select one hundred (100) respondents for the detailed study. A structured questionnaire was used to elicit information from the respondents for the study. Percentage response was used to capture objective i and iii. Objective ii was capture using Probit model analysis. The result showed that majority of the respondents were married, youthful, had moderate household size, educated and highly experienced in farming. The determinant factors to the use of child labour among rural household were relationship between the child and household heads, access to credit and educational level. The major operations accomplished by the children in the study area were bird scaring, fertilizer application and planting. The child right act should be enforced by appropriate government agencies and the offenders brought to book, free education to all children and social mobilization on change of attitude to use of child labour were recommended. Keywords; Determinants, Child Labour, Crop Production, Anambra State, Nigeria

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Analysis of the fertilizer application status in root vegetables and potentials of saving energy and reducing emission – a case study of Hebei province

Acta Horticulturae ◽

10.17660/actahortic.2017.1192.21 ◽

2017 ◽

pp. 185-192

Author(s):

Z.M. Sun ◽

X. Wang ◽

H. Liu ◽

Y. Wang ◽

X.X. Zhang ◽

...

Keyword(s):

Fertilizer Application ◽

Hebei Province ◽

Saving Energy ◽

Root Vegetables

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Vulnerability of groundwater to pollution from agricultural diffuse sources: a case study

Water Science & Technology ◽

10.2166/wst.2002.0191 ◽

2002 ◽

Vol 45 (9) ◽

pp. 1-7 ◽

Cited By ~ 9

Author(s):

H. Muhammetoğlu ◽

A. Muhammetoğlu ◽

S. Soyupak

Keyword(s):

Fertilizer Application ◽

Agricultural Activities ◽

Pollution Problem ◽

Different Types ◽

Different Depths ◽

Total Salinity ◽

Nitrogen Phosphorus ◽

Model Approach

Kumluca, near Antalya in Turkey, is an important plain with its intensive agricultural activities employing greenhouses. The chemical fertilizer application practices caused excessive increases of the nitrogen, phosphorus and salinity within groundwater. A study has been initiated to assess the present state of the groundwater pollution problem of Kumluca Plain. A total of nine measurement and sampling stations have been selected to represent different depths groundwater table, different types of agricultural activities and different soil types. The magnitudes of the parameters: temperature, salinity and conductivity, nitrate, nitrite, ammonia, orthophosphate and fecal coliform were determined for groundwater. Soil samples collected from the stations have been analyzed for several parameters such as texture, total salinity, total nitrogen, and total phosphorus. The measurement and analyses results of the groundwater showed wide spatial variations depending on factors such as the quality of irrigation water, depth groundwater, soil characteristics, type and age of agriculture and hydrology. Groundwater vulnerabilities to pollution have been analyzed using the SEEPAGE Model approach. Furthermore the soil, aquifer and groundwater characteristics, which will be utilized to establish “cause” and “effect” relationships in future, have been clarified.

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