Grain number and its relationship with dry matter, N and P in the spikes at heading in response to N×P fertilization in barley

The aim of this work was to study the effects of nitrogen (N) and phosphorus (P) deficiencies and their interaction on spike N, P and biomass around flowering in barley (Hordeum vulgare spp. distichum L.) and its relationship with grain number and grain yield. Two experiments were carried out with microcrops grown in 200 l containers using malting barley (cv. Quilmes Palomar). Treatments were a factorial combination of two levels of N and two or...