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| | Erosion and Productivity of Vegetable Systems on Sloping Volcanic Ash-Derived Philippine Soils -- Poudel et al. 63 (5): ... (Site not responding. Last check: 2007-11-01) |
 | | crops are planted in alternating strips on the contour (Morgan, 1986), |
 | | Strip cropping was also effective in lowering N, P, and K losses |
 | | The average ER was 1.2 for organic C, 4.7 for extractable P, 1.7 for Ca, and 1.7 for S. In contrast, the ER was 0.8 for K, 0.8 for Mg, and 0.85 for N. With the exception of K and Mg, |
| soil.scijournals.org /cgi/content/full/63/5/1366 (6510 words) |
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