| Numerical Results of the Field Experiments 1969 | -2 |
| Contents | 2 |
| Conventions | 6 |
| 69/R/BK/1 - Broadbalk - Wheat, Potatoes & Beans | 8 |
| 69/R/HB/2 - Hoosfield - Barley, Potatoes & Beans | 14 |
| 69/R/WF/3 - Wheat and Fallow - Wheat | 20 |
| 69/R/EX/4 - Exhaustion Land - Barley | 21 |
| 69/R/PG/5 - Park Grass - Grass | 22 |
| 69/R/AG/6 - Agdell - Grass | 24 |
| 69/R/BN/7 - Barnfield - Potatoes, Sugar Beet & Beans | 27 |
| 69/R/GC/8 - Garden Clover - Clover | 36 |
| 69/S/RN/1 - Rotation 1 - Wheat, Beans, Sugar Beet & Barley | 38 |
| 69/S/RN/2 - Rotation 2 - Potatoes, Sugar Beet & Barley | 42 |
| Rotation Experiments - | 47 |
| 69/R/RN/1&2 - Ley and Arable Rotations - Old Grass, Leys, Oats, Wheat, Potatoes & Barley | 47 |
| 69/W/RN/3 - Ley and Arable Rotations - Leys, Potatoes, Rye, Carrots & Barley | 67 |
| 69/W/RN/4 - Market Garden Experiment - Beans | 75 |
| 69/R/BN/5 - Arable Reference Plots - Old Grass, Barley, Ley, Potatoes, Wheat & Kale | 78 |
| 69/W/RN/6 - Arable Reference Plots - Old Grass, Fruit, Sugar Beet, Barley, Ley, Potatoes & Oats | 82 |
| 69/R/RN/7 - Residual Phosphate Rotation - Potatoes, Barley & Swedes | 86 |
| 69/R/RNO - Cultivation Weedkiller Rotation - Beans, Wheat, Potatoes & Barley | 89 |
| 69/R/RN/9 - Cereal Disease Reference Plots - Beans, Oats & Wheat | 96 |
| 69/R/RN/11 - Irrigation - Barley & Potatoes | 98 |
| 69/W/RN/12 - Organic Manuring - Leys & Sugar Beet | 101 |
| 69/W/RN/13 - Intensive Cereals - Ley, Potatoes, Wheat & Barley | 106 |
| 69/W/RN/14 - Long Term Phosphate - Barley & Potatoes | 118 |
| 69/W/RN/15 - Rotation & Fumigation - Potatoes, Sugar Beet & Barley | 121 |
| 69/R/CS/1 - Levels of N & K - Potatoes | 126 |
| Crop Sequence Experiments - Crops in 1969 - | 126 |
| 69/R/CS/2 - Grazed Reference Plots - Old Grass | 129 |
| 69/R/CS/6 - Wheat After Intensive Barley - Wheat | 131 |
| 69/W/CS/8 - Forestry Reference Plots - Sitka Spruce | 133 |
| 69/W/CS/9 - Forestry Forms of Fertiliser - Sitka Spruce & Grand Fir | 135 |
| 69/W/CS/10 - Long Term Liming - Fallow | 137 |
| 69/W/CS/11 - Soil Structure - Beans | 138 |
| 69/R/CS/12 - Formalin & N (2 Sites) - Winter Wheat | 140 |
| 69/R/CS/13 - N Levels to Old Grass - Old Grass (Park Grass Plot 6 Microplots) | 143 |
| 69/R/CS/14 - Npy to Old Grass - Old Grass (Park Grass Plot 5 Microplots) | 145 |
| 69/W/CS/15 - Direct Seeding - Winter Wheat | 154 |
| 69/W/CS/16 - Irrigation & Eelworms - Potatoes | 156 |
| 69/W/CS/17 - Cereal Cyst Nematode - Barley | 160 |
| 69/R/CS/18 - Lucerne Virus Control - Lucerne & Lucerne/COCKSFOOT | 164 |
| 69/W/CS/20 - Placement of Fumigant - Potatoes | 166 |
| 69/W/CS/21 - Nematicides (Ploughsole Dd) - Barley | 168 |
| 69/R/CS/22 - Soil Sterilants - Winter Wheat | 170 |
| 69/R/CS/23 - Simulated Grazing - Old Grass | 172 |
| 69/R/CS/24 - P, K & Take-all - Barley | 186 |
| 69/R/CS/25 - Insecticides & Molluscicides - Old Grass | 188 |
| 69/R&W/CS/27&31 - N Fixation - Lucerne & Ryegrass | 190 |
| 69/W/CS/28 - Fumigants & Irrigation - Barley | 201 |
| 69/W/CS/29 - Forms of Magnesium - Potatoes | 203 |
| 69/W/CS/32 - Ibdu - Ryegrass | 205 |
| 69/W/CS/33 - Rates of Nematicides Dosage - Potatoes | 207 |
| 69/R/CS/41 - Cultivations & Soil Invertebrates - Grass | 209 |
| 69/R/CS/42 - Effect of Invertebrates on Yield - Grass | 211 |
| 69/R/CS/43 - Aqua Ammonia - Grass | 214 |
| 69/R/CS/44 - Break Crops & Wheat - Cereals & Legumes | 218 |
| 69/W/CS/45 - Nematicides in Rows - Sugar Beet | 220 |
| 69/R/CS/47 - Thiourea - Spring Wheat | 224 |
| 69/S/CS/1 - Intensive Wheat - Beans & Wheat | 226 |
| 69/S/CS/2 - Phosphate & Potash - Lucerne | 228 |
| 69/S/CS/3 - Rates, Forms and Times of N - Grass | 231 |
| 69/S/CS/4 - P and K Residues - Spring Wheat After Clover | 233 |
| Annual Experiments - Winter Wheat - | 235 |
| 69/R&W/W/1 - Varieties & N - | 235 |
| 69/R&W/W/2 - Deep-drilled Fertiliser - | 238 |
| 69/R/W/4 - Cultivations & Bulb Fly - | 243 |
| 69/R/W/5 - Gaines, Seed Rates & N - | 245 |
| 69/R/W/6 - Ccc Treated Seed & N - | 247 |
| 69/R/W/ 10 - Chemical Control of Take-all - | 249 |
| Annual Experiments - Spring Wheat - | 251 |
| 69/R/W/11 - Gaps - Spring Wheat | 251 |
| 69/R/W/12 - Varieties, N & Ethirimol - Spring Wheat | 253 |
| 69/R/W/13 - Paths & Blank Rows - Spring Wheat | 255 |
| 69/R&W/B/1 - Varieties, N & Ethirimol - Barley | 257 |
| Barley | 257 |
| 69/R&W/B/2 - Deep-drilled Fertiliser - Barley | 260 |
| 69/R&W/B/3 - Deep-drilled Urea & 'nitro-chalk' - Barley | 263 |
| 69/R/B/4 - Early & Late Mildew - Barley | 265 |
| 69/R/B/5 - Paths & Blank Rows - Barley | 267 |
| 69/S/B/1 - Varieties, N & Ethirimol - Barley | 269 |
| 69/S/B/2 - Ibdu - Barley | 272 |
| Beans | 274 |
| 69/R/BE/1 - B-nine, N, Row Spacing and Seed Rate - Beans | 274 |
| 69/W/BE/1 - Fumigation & N - Beans | 276 |
| 69/R/BE/2 - Growth Regulators - Beans | 278 |
| 69/W/BE/2 - Insecticide & Sitona - Beans | 280 |
| 69/R&W/BE/3 - Rhizobium Strains - Beans | 282 |
| 69/R&W/BE/4 - Deep-drilled Fertiliser - Beans | 284 |
| 69/R/BE/5 - Aphids - Beans | 287 |
| 69/R/RA/2 - Seed Rates, Row Spacing, N & Ccc - Spring Oilseed Rape | 289 |
| Spring Oilseed Rape - | 289 |
| 69/R/RA/3 - Insecticides & Beneficial Insects - Spring Oilseed Rape | 293 |
| Potatoes - | 295 |
| 69/R&W/P/1 - Seed Stocks, Diseases & Fungicide - Potatoes | 295 |
| 69/R/P/2 - Chemicals & Seed-borne Fungi - Potatoes | 301 |
| 69/W/P/2 - Nematodes & Verticillium - Potatoes | 304 |
| 69/W/P/3 - Verticillium, Varieties & Ccc - Potatoes | 306 |
| 69/W/P/4 - Chemicals & Scab - Potatoes | 309 |
| 69/R/P/6 - Blight Reference Plots - Potatoes | 311 |
| 69/W/P/6 - Deeply Injected Fertiliser - Potatoes | 313 |
| 69/R/P/7 - Comparison of Fungicides - Potatoes | 315 |
| 69/R/P/8 - Growth Regulators - Potatoes | 317 |
| Oats | 319 |
| 69/R/0/1 - Growth Regulators & N - Oats | 319 |
| Grass | 321 |
| 69/R/G/1 - Anhydrous & Aqueous Ammonia - Grass | 321 |
| Sweet Corn | 323 |
| 69/G/SC/1 - Seed Spacing, Phorate & N - Sweet Corn | 324 |
| Mixed Crop | 327 |
| 69/R&W/M/2 - Inocula & N - Beans and Spring Wheat - Mixed Crop | 327 |
| Miscellaneous Data | 333 |
| 69/E/1 - Meteorological Records - Rothamsted, Woburn & Saxmundham | 333 |
| Conversion Factor | 336 |
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