TAILIEUCHUNG - The application for fertilizer-yield relationships of the ET–yield response factor equation

Many attempts have been made to understand the plant response to water using plant growth models. The effects of fertilizer on crop yield are greater than those of water. Therefore, some models that have been developed for the evaluation of water–yield relationships can also be used for fertilizer-yield relationships. | Turkish Journal of Agriculture and Forestry Research Article Turk J Agric For (2014) 38: 732-738 © TÜBİTAK doi: The application for fertilizer–yield relationships of the ET–yield response factor equation Ahmet ERTEK* Department of Irrigation, Faculty of Agriculture, Süleyman Demirel University, Isparta, Turkey Received: Accepted: Published Online: Printed: Abstract: Many attempts have been made to understand the plant response to water using plant growth models. The effects of fertilizer on crop yield are greater than those of water. Therefore, some models that have been developed for the evaluation of water–yield relationships can also be used for fertilizer–yield relationships. The purpose of this study was to develop an equation to use in fertilizer applications similar to one used to evaluate crop production under adequate and deficit water supply regimes. The equation can be rewritten for the fertilizer consumed by plants instead of the evapotranspiration (ET). Sample applications showed that the resulting ET–yield response factor equation can be used successfully in the evaluation of fertilizer–yield relationships. Thus, the yield loss per unit of fertilizer deficiency can be determined more precisely by the equation. Key words: Yield–response factor, fertilization, relative yield decrease, fertilizer uptake 1. Introduction The upper limit of yield is set by soil fertility, climatic conditions, management practices, and genetic potential of the crop. Where all of these are optimal throughout the growing season, yield reaches its maximum value. Any significant decrease in soil water storage has an impact on water availability for a crop and, subsequently, on actual yield and actual evapotranspiration (Moutonnet, 2000). The extent to which this limit can be reached will always depend on how adequately the water supply meets the biological needs of

• Nông nghiệp
• Yield response factor
• Relative yield decrease
• Fertilizer uptake
• Water yield
• Soil fertility
• Soil fertility gradient
• Nutrient uptake
• Nutrient uptake and soil fertility
• Soil fertility gradient experiment
• Basis of crop yield
• Soil fertility mapping
• Soil fertility status
• Available calcium
• Magnesium in soil
• Fertility mapping using GPS
• GIS techniques of dharmaur micro watershed
• Owk mandal
• Soil fertility maps
• Identification of soil related constraints
• GPS and GIS based soil fertility maps
• GIS based soil fertility maps
• Soil fertility and sustainability
• Beneficial effects of PGPR
• Noble liquid manures
• Enhancing soil fertility
• Enhancing soil fertility and sustainability
• Bhudargad tehsil
• GPS GIS based soil fertility maps
• Based soil fertility maps
• Available nutrients
• Gradient crop
• Green fodder
• Sorghum and yield
• Fodder yield of sorghum
• Artificial soil fertility gradient strategy
• Acacia nilotica
• Wheat based agroforestry system
• Varying soil depths
• Acacia nilotica on soil fertility status
• Canopy of acacia nilotica
• Bodi block organic carbon
• Soil fertilty status
• Fertility indices of bodi block
• Fertility indices
• Geo information based soil fertility status
• Geo information based
• Prepare GPS GIS based
• Respect to soil pH
• Soil fertility map
• Excel free formshapes polygon
• DEXCEL map
• Soil properties
• Prepare soil fertility map
• Soil survey
• Soil physico chemical properties
• Fertility status of Jantapur 1 microwatershed
• Deficient in zinc
• Soil acidity
• Nutrient index
• Villages of lahowal block
• Assessment of soil fertility
• Soil fertility and nutrient uptake
• Maize yield and soil fertility
• Organic manure on maize yield
• Different levels of fertilizer application
• Kharif onion
• Physiological weight loss
• Residual fertility status of soil
• Inorganic source
• Yield attributing characters
• GIS techniques
• Soil fertility and correlation study
• Mapping of soil fertility status
• Korasagu 4 micro watershed
• Geo spatial techniques
• Physico chemical characteristics
• Soil fertility of golpura village
• Golpura village
• Location specific conditions promoting nutrient
• Seed yield
• Nutrient content
• Soil fertility after harvest of mustard
• A integrated nutrient management
• Integrated nutrient management strategies
• Contribution to soil fertility
• Available sulphur
• PSB in combination
• Phosphorus on the enrichment
• Yield of green gram
• Macro and micro nutrients
• Micro nutrients
• Sugarcane growing soils
• Soil Mapping
• Soil Fertility Testing
• Natural Forests
• Main Edaphic Properties
• Grid method
• Arc GIS
• Tatrakallu village
• Soil fertility constraints
• Different cropping systems
• Hill zone acid soils
• Soil fertility status as influenced
• Moderately acidic in range
• Soil fertility status of Mandal block
• Mandal block
• Slightly alkaline to strongly alkaline
• Water soluble cations
• Soil fertility status of Majhwa block
• Soils was higher as compared to sub surface
• Physico chemical properties