Operational use of agro-meteorological data and GIS to derive site specific nitrogen fertilizer recommendations based on the simulation of soil and crop growth processes

2005 ◽  
Vol 30 (1-3) ◽  
pp. 59-67 ◽  
Author(s):  
K.C. Kersebaum ◽  
K. Lorenz ◽  
H.I. Reuter ◽  
J. Schwarz ◽  
M. Wegehenkel ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Meteorological Data ◽  
Crop Growth ◽  
Growth Processes ◽  
Site Specific ◽  
Fertilizer Recommendations

scholarly journals A Site-Specific Fertilizer Recommendation Based on the Phosphorus and Potassium Status in Mempawah District, West Kalimantan

2020 ◽  
Vol 25 (2) ◽  
pp. 93
Author(s):  
Muhammad Hatta
Keyword(s):  
Soil Analysis ◽  
Nutrient Status ◽  
Soil Samples ◽  
Paddy Fields ◽  
Site Specific ◽  
West Kalimantan ◽  
Fertilizer Recommendation ◽  
Fertilizer Recommendations ◽  
Phosphorus And Potassium ◽  
A Site

The recommendations of Phosphorus (P) and Potassium (K) fertilization for rice are still not site-specific yet due to a lack of required soil data information.  The P and K status of the paddy fields that provide information on the low, medium, and high P and K nutrient status are very useful for determining recommended the site-specific fertilizer in the the district area. The purpose of the research was to determine the site-specific fertilizer recommendation for paddy field based on their P and K status. This research was based on the field survey and the soil analysis in the laboratory. The soil samples were taken using a grid system, and the P and K levels were assessed by using a 25% HCl extraction. Soil samples were taken in a composite manner on all paddy fields in which their status have been identified. The composite soil samples were determined from 10 - 15 individual samples (sub-samples) with a sampling distance of each sub-sample of 25-50 m in the field.  The soil samples were taken in the overlay with a depth of 0-20 cm. Taking sub-samples were done by a diagonal or a zigzag method according to the conditions of paddy fields. The results of the study presented that the nutrient status of P and K and the fertilizer recommendations in paddy fields for rice plants located in 9 sub-districts in Mempawah Dsitrict had shown that nutrient status of P, on average, were from moderate to high levels, meanwhile, the nutrient status of K was from low to high levels. Recommendations for fertilizing rice fields in several sub-districts in Mempawah Regency are mostly 150 kg NPK (15:15:15) ha-1, 200 kg Urea ha-1 and 25 kg KCl ha-1.

scholarly journals Evaluation of crop yield under different nitrogen doses of mineral fertilization

2010 ◽  
Vol 56 (No. 4) ◽  
pp. 163-167 ◽  
Author(s):  
Š. Matějková ◽  
J. Kumhálová ◽  
J. Lipavský
Keyword(s):  
Nitrogen Fertilizer ◽  
Total Yield ◽  
Yield Potential ◽  
Yield Variability ◽  
Production Potential ◽  
Mineral Fertilization ◽  
Winter Rape ◽  
Site Specific ◽  
Combine Harvester ◽  
Different Doses

Yields of winter wheat, winter rape and oats were evaluated in the field; the field was divided into the site-specific zones and treated with variable doses of nitrogen fertilizer in years 2004–2006. Measurements of the yields were carried out with a yield monitor placed in a combine harvester. The measured data were processed into the yield maps by means of ArcGIS 9.2 software. Variable application of fertilizer should balance yield potential of the field. Generally, total yield variability on the field after the application of various doses of experimental fertilizer was similar in the years 2004 (11.3%), 2005 (14.7%) and 2006 (11.7%) in comparison with the year 2003 (25.02%). Variable application of nitrogen in the site-specific zones, created on the basis of the yield levels, decreased the yield variability in comparison with the uniform dose. Different doses of nitrogen fertilizer also enabled to increase utilization of production potential of the experimental field.

An approach for assessing the effects of site-specific fertilization on crop growth and yield of durum wheat in organic agriculture

2014 ◽  
Vol 15 (5) ◽  
pp. 479-498 ◽  
Author(s):  
M. Diacono ◽  
A. Castrignanò ◽  
C. Vitti ◽  
A. M. Stellacci ◽  
L. Marino ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Organic Agriculture ◽  
Crop Growth ◽  
Growth And Yield ◽  
Site Specific

Increased Maize Yields through the Transdisciplinary Process with Site Specific Fertilizer Recommendation in Small Holder Farms in Uasin Gishu County, Kenya

2019 ◽  
pp. 1-10
Author(s):  
Arusey Chebet ◽  
Otinga A. Nekesa ◽  
Wilson Ng’etich ◽  
Ruth Njoroge ◽  
Roland W. Scholz ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Maize Yield ◽  
Soil Testing ◽  
Site Specific ◽  
Maize Grain Yield ◽  
Significant Difference ◽  
Fertilizer Recommendations ◽  
Maize Yields ◽  
Maize Grain

The objective of this study was to evaluate the effects of site-specific fertilizer recommendations on maize yield using the transdisciplinary (TD) process. 144 farmers participated in the study for the two seasons. Experiments were laid on the farmers’ fields at four sites (Kapyemit, Kipsomba, Ngenyilel and Ziwa, in Uasin Gishu County) using Randomized Complete Block Design in a 3 x 2 factorial arrangement. Treatments included farmers who participated in the TD process (TD2) and those who did not (TD1) in using the interventions for soil fertility improvement which were farmer own practices (ST1); farmers who applied government recommendations (ST2), and site-specific fertilizer recommendations (ST3) which was based on soil testing results. The Data collected was the dry weights of maize which were measured at the end of the seasons and subjected to Analysis of Variance using Genstat 14th edition. Means separation was done using Fischer’s unprotected Least Significant Difference.. There was a significant effect on maize yields by soil testing and participation in TD process p = 0.01. The mean maize grain yield for season one was 5.43 ton ha-1 while for season two was 5.73 ton ha-1. Control farmers (TD1) maize grain yield of 5.27 ton ha-1, had a significant difference (p = 0.05) from the yield of participating farmers (TD2) who had 5.96 ton ha-1. Maize grain yield was increased by the application of site specific fertilizer recommendations which gave an overall mean of 6.57 ton ha-1 for season one and 6.56 ton ha-1 for season two. Following (ST3) recommendations and participation in the TD process, improved soil nutrient content thus maize yield increased. We recommend soil testing and consequent site-specific fertilizer recommendations for any initiative in managing soil fertility.

Impact of site-specific fertilizing management in carbon and water footprint. The case of cotton under Mediterranean conditions

2020 ◽  
Author(s):  
Antonios Papadopoulos ◽  
Gerasimos Troyanos ◽  
Dionissios Kalivas ◽  
Maria Doula ◽  
Stamatios Kavasilis ◽  
...  
Keyword(s):  
Water Footprint ◽  
Meteorological Data ◽  
Ghg Emissions ◽  
Emission Factors ◽  
The Other ◽  
Chemical Pollution ◽  
Agricultural Practice ◽  
Site Specific ◽  
Specific Management

<p>In field homogenous application of fertilizers can be considered as a non-environment friendly agricultural practice as it ignores site specific variations of soil and plant properties. Conventional fertilizing management usually results in overfertilization guiding to burdens of the environment in terms of chemical pollution in soil-water system and Greenhouse Gas (GHG) emissions in the atmosphere. The effects are expected to be more severe in Mediterranean region under the evolving climate change. Site-specific fertilizing management on the other hand, poses a practice that is adapted to high precision spatial soil, climatic and plant conditions. In this sense, the agricultural practices are properly adjusted to the needs of the crops. The research is focused on the assessment of the impacts of conventional and site-specific management of nitrogen fertilization to carbon and water footprint at cotton cultivation in field level. The study area concerns two cotton fields in Central Greece that were monitored with the use of classical soil analytical methods and remote sensing sensors throughout a cultivation period. The monitoring process led to the delineation of the fields in different management zones needing variable fertilizing doses. Further, all conventionally applied practices were annotated concerning the last 4-year period in order to collect historical fertilizing data. In both cases (conventional and site-specific) the carbon and water (blue, green, grey) footprints of the two fields were calculated. Carbon footprint was calculated by assessing IPCC 2006 guidelines (updated in 2019) as regards direct and LULUCF emissions. For this, Tier 2 emission factors were used for the main emission categories, as these were defined by the Greek State, while for the other categories, emission factors of Tier 1 of IPCC guidelines were used. For the determination of water footprint, local meteorological data and cotton development stages concerning Greek conditions were used. The determination of the footprints was realized with the use of a software tool developed by the BalkanROAD project in the framework of INTERREG Balkan-Mediterranean 2014-2020 programme, which addresses territorial competitiveness and environment. Preliminary results show encouraging prospective for the improvement of carbon and water footprint when shifting from conventional to site-specific management.</p>

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