Biological Agriculture & Horticulture, Volume 4A B Academic Publishers, 1986 - Agriculture |
Contents
Volume 4 No 2 1986 | 179 |
Volume 4 No 3 1987 | 181 |
G Patriquin N M Hill D Baines M Bishop and G Allen | 198 |
Copyright | |
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activity agricultural amount applied arable areas authors biological biomass cereals changes chapter chemical classes clover compared composts considered contains contributing crop cultivation damage decomposition determined discussed economic effects environmental estimated Evans experiment fababeans factors farmers farming fertilizer field FIGURE given glucose green manures growth higher important included increase indicated infection Journal land leaf legume less levels litter London loss manure materials means measured methods mineral moisture natural nettle water nitrogen nutrient oats observed occurred organic matter period pest pesticides plant plots potential practices present problems production publication Publishers range rates recent reduced reference relation Report respectively roots rotation samples Science significant soil erosion species structure suggested surface Table techniques treatments types University values weeds winter yields