Effects of suboptimal plant density and non-uniformity in plant spacing on grain yield of raingrown sunflower

摘要: The effects of suboptimal plant density and non-uniformity in spacing on grain yield raingrown sunflower were examined using regression analysis. This involved quantifying the parabolic relationship between weight per area plant. A term for uniformity was added, based proximity neighbouring plants within row. Multiple accounted 50% total variation amongst 1071 analysed. 3 constants considered to indicate potential crop, proportion space available not utilised at low density, most scarce resource denied individual high relative an equivalent even spacing. technique permitted quantification levels unevenness, percentage reductions attributable Reductions unit mainly due a lack densities, unevenness densities. is proposed surveying crop establishment, estimating over range crops. Further experimentation warranted, determine whether found this are generally applicable.