
%0 Journal Article
%A Bolland, MDA 
%A Baker, MJ 
%T High phosphorus concentration in <I>Trifolium balansae</I> and <I>Medicago polymorpha</I> seed increases in herbage and seed yields in the field
%J Australian Journal of Experimental Agriculture
%D 1989/12/01
%V 29
%N 6
%P 791-795
%K 
%R https://doi.org/10.1071/EA9890791
%U https://www.publish.csiro.au/paper/EA9890791 
%X Seed of Trifolium balansae and Medicago polymorpha, of the same size (mean &#177; s.d., T. balansae 0.8 &#177; 0.01 mglseed, M. polymorpha 3.6 &#177; 0.05 mg/seed) but with increasing phosphorus (P) concentration in the seed (T. balansae 0.34 to 0.63% P, M. polymorpha 0.40 to 0.64% P), were sown in field experiments as singlestrain, dense, ungrazed swards on 2 different soil types (a sand and a lateritic gravel sand) in south-western Australia. Different amounts of superphosphate were drilled with the seed (5-40 kg P/ha for the sand, and 15-100 kg P/ha for the lateritic gravel sand). Increasing P concentration in seed increased yields of dried herbage measured at each harvest, and also increased seed yields (measured for M. polymorpha only). Increasing P concentration in the seed increased the effectiveness of superphosphate drilled with the seed, so that less fertiliser was required to produce the same yield as P concentration in the seed increased. 
