Response of tomato and okra to nitrogen fertilizer in sole cropping and intercropping with cowpea

RESPONSE OF TOMATO (Lycopersicon esculentum Mill.) CULTIVARS TO NITROGEN LEVELS

“…Number of branches gradually increased with the increase of nitrogen [15]. Our observations are in line with Dass and Mishra [16] who observed the highest number of branches (15.5) at 150 kg N ha -1 .…”

“…However, tomato is highly responsive to N, but an excessive rate of N application is seldom adversely affects tomato quality [31]. Olasantan [32] also found that fruit yield of the tomato plant was reduced at higher N application rates. Sainju et al [33] concluded that marketable yields were maximized at N rates of 180 kg N ha -1 .…”

The Effects of Nitrogen Fertilization on Intercropped Strawberry and Broad Bean

“…Extensive evidence indicates that legume crops can release biologically fixed N to the non-legume crop (van Kessel and Hartley, 2000). Thus, the non-legume crop requires less applied fertilizer-N to produce its optimum yield (Olasantan, 1991). Absorption of mineral N by the non-legume crop reduces soil-N pools, thus stimulating N 2 fixation by the legume crop (Waterer, Vessey, and Stobbe, 1994).…”

Vegetable Production in Traditional Farming Systems in Nigeria

“…Adequate information about this beneficial effect of legumes on vegetables is therefore essential as it can be adopted as a cheaper alternative to nitrogen fertilizers. In recent experiments on intercropping of tomato or okra with grain legumes under different nitrogen levels the best fruit yields of the vegetables in the mixtures were obtained when 30 kg N /ha was applied, while in monoculture at least 60 kg N /ha was required (Olasantan, 1989). Earlier reports on intercropping these fruit vegetables with cow peas without applied nutrients indicated complementary effects between the intercrops (Olasantan, 1985b;Olasantan and Aina, 1987).…”