PDA News
The PDA publishes both technical News items and shorter Blog items. PDA News provides the latest up to date information on macronutrients and their use, while blog items are shorter and timelier.
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Some frequently asked questions about P and K
August 2009
Q: How much potash do I need to apply to raise my soil K Index to the target Index of 2-? A: This depends on soil type. Heavy soils will require more potash than light soils. When less potash is applied than is removed the K Index on light soils will fall more quickly than […]
Nutrient management risks for major crops
July 2009
About 70% of the income from arable cropping in the UK (excluding fruit and vegetables) comes from cereals and oilseeds. Given the primary importance of these crops it is surprising that such risks are taken with their performance. Figure 1 shows the area of winter wheat and of oilseed rape which received a dressing of […]
Cereal straw – nutrient contents
June 2009
Straw has always been an important by-product of cereal production, with its main use historically being as feed and bedding for livestock. This remains the primary use, but other markets have developed over recent years, particularly as a result of the low profitability of arable farming and the need to maximise returns through the sale […]