No abstract

The effect of K nutrition on the growth in sand culture of young tomato plants, cv. Amberley Cross, was examined and the concentrations of K in the nutrient feed and in the leaves associated with maximum flower number, fruit set and yield were determined. The distribution of K between and within fruit trusses of normal and K-deficient plants, cv. Amberley Cross and Moneymaker grown in peat/loam was also studied. Total dry weights of 6-wk-old plants grown in sand were maximal when the nutrient feed contained 0.53-5.03 me K+/1, although plants receiving 10.23 me K+/1 retained more water in the foliage and therefore had the greatest foliage fresh weight. Both peduncle length and height of the basal truss were increased by K in the feed up to 10.23 me/l, the highest concentration used. Flower development was retarded below 0.53 me K+/1, and fruit setting efficiency was reduced below 2.03 me K+/1. Fruit ripened faster on plants receiving low concentrations of K. Maximum fruit yields were produced on plants grown ill sand receiving 5.03 or 10.23 me K+/1.

No abstract

Lettuce plants grown in beds of soil previously fumigated with methyl bromide accumulated water-extractable bromide, the amount present in the tissues depending on the concentration of inorganic bromide produced in the soil by the breakdown of the fumigant. Samples of lettuce plants from commercial nursery soils fumigated with methyl bromide at rates of 1-2 lb/ IOO ft2 (49-98 g/m2) gave rise to soil bromide levels of I 1-61 ,ug/g. The corresponding bromide concentrations in the plants ranged from 1.6 to

No abstract