Effect of cultivar and planting pattern on yield and apparent harvest index in soybean glycine max

Walker, A.K.; Fioritto, R.J.

Crop Science 24(1): 154-155


ISSN/ISBN: 0011-183X
DOI: 10.2135/cropsci1984.0011183x002400010036x
Accession: 005229962

Download citation:  

Article/Abstract emailed within 0-6 h
Payments are secure & encrypted
Powered by Stripe
Powered by PayPal

Three determinate soybean cultivars were recently released because of their yield superiority to indeterminate cultivars when planted in narrow rows. The objective of our study was to determine if this yield advantage was because determinate cultivars had higher apparent harvest indices (ratio of seed yield to mature plant weight) than indeterminate cultivars when planted in narrow rows. Eight indeterminate and 3 determinate cultivars were grown in 3 environments with 2 planting patterns. The wide-row planting pattern had 76-cm rows with 38.9 viable seeds/m2 and the narrow-row planting pattern had 19-cm rows with 52.7 viable seeds/m2. Characters examined were maturity, mature plant population, seed yield and apparent harvest index. Only seed yield had a significant cultivar by planting pattern interaction. Several indeterminate and the 3 determinate cultivars showed a high yield response to the narrow-row planting pattern. An 18% average yield increase resulted from decreasing row widths from 76 to 19 cm. The apparent harvest indices of the determinate cultivars were similar to the apparent harvest indices of several indeterminate cultivars in both planting patterns. Other factors such as total dry matter production and final plant population may be as important as apparent harvest index in determining seed yield for determinate cultivars.