73. Deriving application maps for precision fertilization from soil scans and historical NDVI maps

The soil fertility was degraded as a result of unreasonable tillage, therefore the application of site-specific nutrient replacement is necessary. It is essential for the application of precision fertilization to know the location, extension, soil properties and nutrient-supply of the different soil types ofcultivated areas.We collected soil samples from 580 hectares of land in 2006. Soil samples were collected from every 5 ha in 30 and 60 cm depths during Spring from 20.05.2006 to 12.06.2006 and again in Autumn from 09.19.2006 to 02.10.2006. Soil samples were analysed at the Department of Agricultural Chemistry and Soil Science of DE-ATC.The two examined soils are slightly calcareous, weakly saline, poor in zinc. The calcareous chernozem soil is slightly acid, the content of humus, nitrogen, phosphorus and potassium is medium in this soil. The meadow chernozem soil is slightly alkaline, and properly supplied with humus and potassium, and middling supplied with nitrogen and phosphorus. The meadow chernozem soil is more heterogenous in soil plasticity, lime, saline, nitrogen phosphorus and potassium content and less heterogenous in pH and zinc content than the calcareous chernozem soil.Standard deviation of measured values in pH, soil plasticity, humus and nitrogen content significantly differ between the examined soil types. The soil plasticity, pH, humus, nitrogen and zinc content significantly differ among calcareous chernozem soil and meadow chernozem soil, but the difference in phosphorus content can be statistically proven only in case of Spring soil sampling.

Download Full-text

BIOLOGICAL PECULIARITIES IN THE RESPONSIVENESS OF VEGETABLE CROP ROTATION TO PRECISION FERTILIZATION

Sel skokhozyaistvennaya Biologiya ◽

10.15389/agrobiology.2017.3.454eng ◽

2017 ◽

Vol 52 (3) ◽

pp. 454-463

Author(s):

A.I. Ivanov ◽

◽

V.V. Lapa ◽

A.A. Konashenkov ◽

Zh.A. Ivanov ◽

...

Keyword(s):

Crop Rotation ◽

Vegetable Crop ◽

Precision Fertilization

Download Full-text

Testing the use of an analytical and mechanistic C3 - biomass accumulation model for precision fertilization

Agricultural and Food Science ◽

10.23986/afsci.40938 ◽

2014 ◽

Vol 23 (2) ◽

pp. 89-105 ◽

Cited By ~ 1

Author(s):

Mikko Hakojärvi ◽

Mikko Hautala ◽

Laura Alakukku

Keyword(s):

Growth Model ◽

Nutrient Use Efficiency ◽

Model Performance ◽

Biomass Accumulation ◽

Growing Season ◽

Triticum Aestivum L ◽

Fertilizer Application ◽

Crop Growth ◽

Crop Growth Model ◽

Precision Fertilization

A single and uniform fertilizer application may lead to ineffective crop nutrient uptake and use. In order to enhance nutrient use efficiency the application should be adjusted according to the need of the cultivated crop. This task is challenging because weather is unknown and unpredictable over the upcoming growing season. One solution is site-specific fertilizer application in several separate events throughout the season. Such a precision fertilization method requires information on the current crop state (e.g. the availability of water and nutrients in the soil) and a crop growth model that aims to assess current crop growth and near future needs. A field experiment with varying radiation, precipitation and nutrient conditions was established to test our crop growth model performance. Spring wheat (Triticum aestivum L.) was grown using three fertilization rates with three precipitation and two radiation treatments within each fertilization treatment. The observed crop biomass accumulation in the highest fertilization treatment was considered as the highest possible in the prevailing conditions. The simulated (maximal) biomass accumulation was in agreement with the highest observed biomass yield. The results were found promising for further use of the model in crop growth evaluation during the growing season.

Download Full-text

SUSTAINABLE NURSERY PRODUCTION PRACTICES EXTENSION PROGRAMS: IPM AND BMP

HortScience ◽

10.21273/hortsci.41.3.499e ◽

2006 ◽

Vol 41 (3) ◽

pp. 499E-499

Author(s):

Amy Fulcher ◽

Dava Hayden ◽

Winston Dunwell

Keyword(s):

Host Plants ◽

Management Practice ◽

Extension Programs ◽

Best Management ◽

Production Practice ◽

Nursery Production ◽

Production Practices ◽

Precision Fertilization ◽

Program Components ◽

Extension Program

The objectives of Kentucky's Sustainable Nursery Production Practices Extension Program are for 1) the Kentucky nursery industry to continue sustained growth and 2) Kentucky growers to produce high quality plants, efficiently use pesticides, be stewards of their land and Kentucky's environment. Sustainable Nursery Program Components are 1) Integrated Pest Management (IPM): Nursery Scouting, Scout Training and Scouting Education for growers, Extension workers, and students; 2) Best Management Practice (BMP) Workshops: BMP VI: Disease Demolition Workshop; 3) Production Practice Demonstration: Pruning Training, Pesticide Handling, and Safety and Environmental Stewartship. 4.) Research: Pruning protocols; Media and media amendments; Precision Fertilization and Irrigation. The Kentucky Nursery Crops Scouting Program scouting guidelines were developed and contained: a weekly scouting/trapping guide; a listing of which pests to look for and on what host plants, and a detailed methodology of precisely how to look for the pest, its damage, and how to record this information such that comparisons could be made across nurseries and seasons.

Download Full-text