粉煤灰磁化复合肥是一种新型肥料，为春对花生根瘤形成和产量的影响，在汝南县砂姜黑土上进行了试验，粉煤灰磁化肥在花生上一般用量的８４０ｋｇ／ｈｍ＾２左......

Plant growth promontory Pseudomonas strains were isolated from root nodules of five plant species, viz., Trifolium prete......