Zinc experiments on potatoes in the San Luis Valley of Colorado

Effect of current-season application of calcitic lime and phosphorus fertilization on potato tuber phosphorus concentration and leaf chemical composition

“…Iron concentration significantly increased over time in experiment F1 (Table 5). In contrast, Soltanpour et al [36] for the cultivar Red McClures, reported that Fe concentrations in 4 th and 5 th leaves from the top decreased from 308 -342 mg kg 21 at 59 days after planting to 68 -72 mg kg 21 88 days after planting. In contrast, Soltanpour et al [36] for the cultivar Red McClures, reported that Fe concentrations in 4 th and 5 th leaves from the top decreased from 308 -342 mg kg 21 at 59 days after planting to 68 -72 mg kg 21 88 days after planting.…”

Zinc Fertilization Increases Ascorbic Acid and Mineral Contents of Potatoes

“…Fertilizer mixtures containing micronutrients have been used to improve yields, especially on soils that have been intensively cropped (Langille and Batteese, 1974). Although field studies by Hawkins et al (1941) indicated that zinc application did not affect potato yields, other works by Brown and Leggett (1964) and Soltanpour et al (1970) era1 composition of potato tubers as a result of specific mineral fertilizers have not been investigated.…”