Premium
Effects of type of potash and rates of nitrogen, phosphate and potassium in fertilisers on growth, yield and quality of potato crops
Author(s) -
Henderson R.
Publication year - 1965
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740160812
Subject(s) - potash , potassium , yield (engineering) , dry matter , chemistry , agronomy , nitrogen , phosphate , crop , biology , metallurgy , materials science , organic chemistry
Eleven experiments were made in Scotland to compare the effects of fertiliser sulphate and muriate of potash on the growth, yield and quality of potato crops. Potassium bicarbonate was also tested in nine of the experiments. There were two rates of nitrogen and potash in all cases and of phosphate in six. In general, sulphate gave more seed, less ware and more total crop than muriate, indicating that both the number and the size of tubers were affected by the exchange, number more than size. There were large differences between sites in the exchange effect, but the reasons for this were not clear. Sulphate generally gave a drier potato with higher content of dry matter and higher specific gravity than muriate, and also a mealier product when cooked. Intersite differences in quality were very large. The higher nitrogen rate reduced seed and total yields but the higher phosphate rate increased yield. The higher potassium rate reduced the weight of seed but increased ware and total yields.