Studies in potato agronomy. II. The effects of variety and time of planting on growth, development and yield

Abstract

1. A factori al experiment involving four varieties (Ulster Chieftain, Arran Pilot, Craig's Royal and Ulster Torch) and three times of planting (28 March, 13 April and 2 May) was undertaken with a view to investigating the effects on growth development and yield of these factors. Only a limited amount of data was obtained in respect of Craig's Royal, because of its extreme variability in the first two times of planting. In addition, data in respect of King Edward and Majestic planted on the second date in an adjacent experiment are discussed.2. In general, yields from Ulster Torch were about twice as great as those from Ulster Chieftain, with the other varieties occupying intermediate positions. The total yield of Ulster Chieftain increased with delay in planting, while in Arran Pilot, Craig's Royal and Ulster Torch, yield was greatest at the intermediate planting date, slightly lower than this at the first, and lowest at the third. Ware yield as a proportion of the total increased with delay in planting.

Temporal dynamics of tuber formation and related processes in a crossing population of potato (Solanum tuberosum)

“…The same was observed for the cultivars. These results contrast with the observations made by Milthorpe (1963), Ivins & Bremner (1965), Bremner & Radley (1966) and Ewing & Struik (1992), based on a limited number of cultivars, on the determinant influence of tuber initiation on the development of the potato plant. Ivins & Bremner (1965) and Slater (1963) indicated that the rate of tuber growth and the time to foliage senescence were related to the size of the canopy present at tuber initiation.…”

Effects of Planting Date on the Growth and Yield of Two Potato Cultivars Grown from Microtubersand Conventional Seed Tubers

“…Tuber fresh yield is closely related to leaf area duration (Bremner and Radley, 1966;. The shortening of the growing period was the main cause of the lower tuber yield with the later planting date in this study.…”

Effect of High Temperature, Daylength, and Reduced Solar Radiation on Potato Growth and Yield

“…3). Also, tuber initiation makes diversion of assimilates to tuber, thus early tuber initiations cause small plants and leaf area leading to lower final yield (Ivins and Bremner, 1965;Bremner and Radley, 1966). Therefore, environmental conditions during the early growth (before tuber initiation and early tuber growth phase) may play crucial role for the late tuber growth.…”