1. Direct drilling and reduced cultivations;Allen,1981
2. Winter barley;Anon,1985
3. Cultivation requirements for winter barley;Anon,1985
4. Cereal production with broadcast seed and reduced tillage: a review of recent experimental and farming experience;Ball;J. Agric. Eng. Res.,1986
5. Soil and winter barley responses to cultivations and nitrogen fertiliser rates on a stony loam in Berwickshire, 1980;Ball;Scott. Inst. Agric. Eng., Dep. Note SIN/341,1982