The screening of 114 groundnut (Arachis hypogaea L.) genotypes (61 advanced breeding lines and 53 releasedcultivars) was undertaken in the plots to identify iron-efficient tolerant lime-induced ironchlorosis.The crop grown intensity chlorosis top five leaves rated for visual chlorotic rating(VCR) score on a 1-5 scale percentage plants showing deficiency symptoms at 10, 20, 30 65 daysafter emerg...

One method for refining nitrogen (N) application in corn is use of in-season crop sensing. To aid producers in making decisions regarding N rate adjustments, a calibrated relationship between sensor-derived information and expected N application need should be established. Nitrogen rate trials were conducted at multiple sites across Iowa in 2001-2003. Nitrogen was applied at or shortly after co...

In Hungary, irrigation determines the success of water-intensive beet cultivation. Taking into account guidelines circular economy, we investigated effect with pre-treated nutrient-rich effluent from an intensive catfish-farm on growth stages sugar and fodder beet. two-year-experiment (2020, 2021), two (‘Helenika’, ‘Grandiosa’) (‘Rózsaszín Béta’, ‘Béta Vöröshenger’) cultivars were grown. additi...

Abstract—Nitrogen fertilizer is the most used and often the most mismanaged nutrient input. Nitrogen management has tremendous implications on crop productivity, quality and environmental stewardship. Sufficient nitrogen is needed to optimum yield and quality. Soil and in-season plant tissue testing for nitrogen status are a time consuming and expensive process. Real time sensing of plant nitro...

We report on the first implementation of a single photon avalanche diode (SPAD) in 130nm CMOS technology. The SPAD is fabricated as p+/nwell junction with octagonal shape. A guard ring of p-well around the p+ anode is used to prevent premature discharge. To investigate the dynamics of the new device, both active and passive quenching methods have been used. Single photon detection is achieved b...

Abstract The objective of this research was to evaluate the technical feasibility SPAD index in diagnosis N status ‘Esmeralda’ peach. field trial, with five rates applied soil (0, 40, 80, 120 and 160 kg ha-1 as urea form) conducted a randomized block design four replications. During years 2014, 2015, 2016 2017, readings were carried out Minolta SPAD-502 chlorophyll meter, leaf middle part, 40 l...

In this work we investigate operation in the Geiger mode of the new single photon avalanche photo diode (SPAD) SAP500 manufactured by Laser Components. This SPAD is sensitive in the range 400-1000 nm and has a conventional reach-through structure which ensures good quantum efficiency at the long end of the spectrum. By use of passive and active quenching schemes we investigate detection efficie...