Abstract
The effect of different preceding crops, cover crops and manure application on the agronomic performance of potato was studied in two consequantial years in an organic farming system. The effect of lucerne, field pea and spring barley as pre-crops, non legume and mixture used as cover crops were tested as well as the influence of farmyard manure application on potato yield and quality. The cover crop treatments were studied in comparison to control bare fallow. The overall yields of main crop potato remained significantly (P 65 mm in diameter) on average of two years. However, the tuber quality was generaly higher in 2010 than in 2011. Regarding tubers with potato virus Y, common scab, malformation, growth cracks and greening, the percentage was lower in 2010. Keywords: organic farming, nitrogen availability, potato yield, preceding crop, cover crop, manure application
Highlights
The potato (Solanum tuburasum L.) is one of the staple food of modern western civilization and is getting more important in developing countries
Tuber yield response mainly dependents on the rate at which nitrogen is released from preceding crops (Van Delden, 2001) or organic amendments such as animal manures or green manure crops (Neuhoff and Köpke, 2002)
The aim of this experiment was to study the growth of three different preceding crops followed by legume and non-legume catch crops and their residual effects with and without manure application on a succeeding potato crop
Summary
The potato (Solanum tuburasum L.) is one of the staple food of modern western civilization and is getting more important in developing countries. The potato is the fourth most important food crop in the world ranking at 365.8 million tons per year (Faostat, 2014) This crop can be highly productive, but since it has a relatively shallow root system it often requires substantial nutrient input to maintain tuber productivity and quality. Tuber yield response mainly dependents on the rate at which nitrogen is released from preceding crops (Van Delden, 2001) or organic amendments such as animal manures or green manure crops (Neuhoff and Köpke, 2002) The aim of this experiment was to study the growth of three different preceding crops followed by legume and non-legume catch crops and their residual effects with and without manure application on a succeeding potato crop
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