Fertilizer Recommendation Methods for Precision Agriculture – A Systematic Literature Study

Abstract

Spatial variability management of soil chemical attributes is one of the approaches to be employed in the face of the constant challenge of increasing agricultural yield to meet world demand. In this sense, precision agriculture has as one of its tools the application of inputs at varying rates, which seeks to determine the ideal amount of fertilizer at each point of the crop, contrary to the conventional recommendation approach based on average values. In this context, this work studied the fertilizer recommendation methods used in site-specific nutrient management and the calculation methodologies for N, P, and K recommendations. For this purpose, a systematic literature study (SLS), consisting of systematic literature mapping, snowballing, and systematic literature review was performed. The analyzed studies were grouped into five domains (precision agriculture, soil fertility, site-specific nutrient application, fertilizer recommendation methods, and recommendation software for site-specific nutrient application). As a result, the SLS identified 12 methods for recommending N, nine for recommending P, and six for recommending K, in addition to five computer programs for precision agriculture that perform fertilizer recommendations at varying rates.

MOISTURE LIMITS AND POTASSIUM CONCENTRATIONS IN THE SOIL SOLUTION FOR CULTIVATION OF LISIANTHUS (Eustoma grandiflorum) FERTIGATED UNDER PROTECTED ENVIRONMENT CONDITIONS

“…The initial potassium concentrations in the soil solution needed to be established before transplanting the crop and starting the fertigation management, during the two lisianthus cultivation cycles. The methodology consisted of the application of volumes of fertigation solution with different potassium concentrations but with equal concentrations for the other nutrients (Beneduzzi et al, 2022). For this purpose, the nutrient solution of Hoagland & Arnon (1950) diluted to 25% was adopted.…”

Intelligent System for Monitoring Water Content and Solute Concentrations in Soil Cultivated with Fertigated Lisianthus

“…Worldwide, irrigated agriculture is facing serious problems with water scarcity [1,2], forcing many farmers to deal with biosaline agriculture, using unconventional such as saline/brackish or recycled water sources for crop production [3] and also to develop more precise methods of irrigation and water and fertilizer management systems [4][5][6][7][8].…”