Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil nutrient status. Two commercially available, rapid analysis systems were evaluated for analysis of (NO3-) in aqueous standard solutions (AS), and in soil solution (SS), plant sap (PS) and fertigation nutrient solutions (NS) obtained from tomato crops. The systems were the Merck RQFlex reflectometer and the Hanna Instruments C115 Grow Master colorimeter. (NO3-) in AS covered the analytical range of each instrument, being 0.3-3.2 and 0.3-16.1 mmol/L, respectively, for the reflectometer and colorimeter. (NO3-) were 5-14 mmol/L for SS, 2.3-33 mmol/L for NS, and 63-158 mmol/L for PS. Accuracy was evaluated using linear regression against (1) known...
A study was conducted in Arizona in 1997 with the objective of analyzing the accuracy of a recently ...
According to the EU Water Framework Directive the emission of nutrients and plant protection product...
Traditional methods of nitrate determination require costly equipment, a cold chain for sample prese...
Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil ...
Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil ...
A rapid analysis ion-selective electrode (ISE) system for measurement of [NO3−] in nutrient solution...
none5siOptimal crop nitrogen (N) management is required to minimize N losses to the environment in v...
Most vegetable farmers use nitrogen fertilizers to increase crop yield and quality. However, applyin...
One of the many gaps that needs to be solved by precision agriculture technologies is the availabili...
Sensitive and environmental friendly sequential method for the determination of nitrate in vegetable...
Nitrogen concentration in plants is normally determined by expensive and time consuming chemical ana...
The practical value of portable hand-held ion selective electrode sensors (ISE) for on-farm [NO3−] m...
The estimation of plant-available nitrate nitrogen (NO3-N) is essential for any nutrient-management ...
Current fertiliser recommendations for nitrogen are limited in their accuracy and may be improved by...
The usefulness of conventional tissue testing techniques is limited for monitoring and adjusting the...
A study was conducted in Arizona in 1997 with the objective of analyzing the accuracy of a recently ...
According to the EU Water Framework Directive the emission of nutrients and plant protection product...
Traditional methods of nitrate determination require costly equipment, a cold chain for sample prese...
Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil ...
Small analytical systems enabling rapid on-farm analysis may be useful for monitoring crop and soil ...
A rapid analysis ion-selective electrode (ISE) system for measurement of [NO3−] in nutrient solution...
none5siOptimal crop nitrogen (N) management is required to minimize N losses to the environment in v...
Most vegetable farmers use nitrogen fertilizers to increase crop yield and quality. However, applyin...
One of the many gaps that needs to be solved by precision agriculture technologies is the availabili...
Sensitive and environmental friendly sequential method for the determination of nitrate in vegetable...
Nitrogen concentration in plants is normally determined by expensive and time consuming chemical ana...
The practical value of portable hand-held ion selective electrode sensors (ISE) for on-farm [NO3−] m...
The estimation of plant-available nitrate nitrogen (NO3-N) is essential for any nutrient-management ...
Current fertiliser recommendations for nitrogen are limited in their accuracy and may be improved by...
The usefulness of conventional tissue testing techniques is limited for monitoring and adjusting the...
A study was conducted in Arizona in 1997 with the objective of analyzing the accuracy of a recently ...
According to the EU Water Framework Directive the emission of nutrients and plant protection product...
Traditional methods of nitrate determination require costly equipment, a cold chain for sample prese...